Actual source code: petscimpl.h

      1: /*
      2:     Defines the basic header of all PETSc objects.
      3: */
      4: #pragma once
      5: #include <petscsys.h>

      7: /* SUBMANSEC = Sys */

      9: #if defined(PETSC_CLANG_STATIC_ANALYZER)
     10:   #define PetscDisableStaticAnalyzerForExpressionUnderstandingThatThisIsDangerousAndBugprone(...)
     11: #else
     12:   #define PetscDisableStaticAnalyzerForExpressionUnderstandingThatThisIsDangerousAndBugprone(...) __VA_ARGS__
     13: #endif

     15: #if PetscDefined(USE_DEBUG) && !PetscDefined(HAVE_THREADSAFETY)
     16: PETSC_INTERN PetscErrorCode PetscStackSetCheck(PetscBool);
     17: PETSC_INTERN PetscErrorCode PetscStackView(FILE *);
     18: PETSC_INTERN PetscErrorCode PetscStackReset(void);
     19: PETSC_INTERN PetscErrorCode PetscStackCopy(PetscStack *, PetscStack *);
     20: PETSC_INTERN PetscErrorCode PetscStackPrint(PetscStack *, FILE *);
     21: #else
     22:   #define PetscStackSetCheck(check)         PETSC_SUCCESS
     23:   #define PetscStackView(file)              PETSC_SUCCESS
     24:   #define PetscStackReset()                 PETSC_SUCCESS
     25:   #define PetscStackCopy(stackin, stackout) PETSC_SUCCESS
     26:   #define PetscStackPrint(stack, file)      PETSC_SUCCESS
     27: #endif

     29: /* These are used internally by PETSc ASCII IO routines*/
     30: #include <stdarg.h>
     31: PETSC_EXTERN PetscErrorCode PetscVFPrintfDefault(FILE *, const char[], va_list);

     33: /*
     34:    All major PETSc data structures have a common core; this is defined
     35:    below by PETSCHEADER.

     37:    PetscHeaderCreate() should be used whenever creating a PETSc structure.
     38: */

     40: /*
     41:    PetscOps: structure of core operations that all PETSc objects support.

     43:       view()            - Is the routine for viewing the entire PETSc object; for
     44:                           example, MatView() is the general matrix viewing routine.
     45:                           This is used by PetscObjectView((PetscObject)obj) to allow
     46:                           viewing any PETSc object.
     47:       destroy()         - Is the routine for destroying the entire PETSc object;
     48:                           for example,MatDestroy() is the general matrix
     49:                           destruction routine.
     50:                           This is used by PetscObjectDestroy((PetscObject*)&obj) to allow
     51:                           destroying any PETSc object.
     52: */

     54: typedef struct {
     55:   PetscErrorCode (*view)(PetscObject, PetscViewer);
     56:   PetscErrorCode (*destroy)(PetscObject *);
     57: } PetscOps;

     59: typedef enum {
     60:   PETSC_FORTRAN_CALLBACK_CLASS,
     61:   PETSC_FORTRAN_CALLBACK_SUBTYPE,
     62:   PETSC_FORTRAN_CALLBACK_MAXTYPE
     63: } PetscFortranCallbackType;
     64: typedef size_t PetscFortranCallbackId;
     65: #define PETSC_SMALLEST_FORTRAN_CALLBACK ((PetscFortranCallbackId)1000)
     66: PETSC_EXTERN PetscErrorCode PetscFortranCallbackRegister(PetscClassId, const char *, PetscFortranCallbackId *);
     67: PETSC_EXTERN PetscErrorCode PetscFortranCallbackGetSizes(PetscClassId, PetscFortranCallbackId *, PetscFortranCallbackId *);

     69: typedef struct {
     70:   void (*func)(void);
     71:   void *ctx;
     72: } PetscFortranCallback;

     74: /*
     75:    All PETSc objects begin with the fields defined in PETSCHEADER.
     76:    The PetscObject is a way of examining these fields regardless of
     77:    the specific object. In C++ this could be a base abstract class
     78:    from which all objects are derived.
     79: */
     80: #define PETSC_MAX_OPTIONS_HANDLER 5
     81: typedef struct _p_PetscObject {
     82:   PetscOps      bops[1];
     83:   PetscClassId  classid;
     84:   MPI_Comm      comm;
     85:   PetscObjectId id; /* this is used to compare object for identity that may no longer exist since memory addresses get recycled for new objects */
     86:   PetscInt      refct;
     87:   PetscErrorCode (*non_cyclic_references)(PetscObject, PetscInt *);
     88:   PetscInt64        cidx;
     89:   PetscMPIInt       tag;
     90:   PetscFunctionList qlist;
     91:   PetscObjectList   olist;
     92:   char             *class_name; /*  for example, "Vec" */
     93:   char             *description;
     94:   char             *mansec;
     95:   char             *type_name; /*  this is the subclass, for example VECSEQ which equals "seq" */
     96:   char             *name;
     97:   char             *prefix;
     98:   PetscInt          tablevel;
     99:   void             *cpp;
    100:   PetscObjectState  state;
    101:   PetscInt          int_idmax, intstar_idmax;
    102:   PetscObjectState *intcomposedstate, *intstarcomposedstate;
    103:   PetscInt         *intcomposeddata, **intstarcomposeddata;
    104:   PetscInt          real_idmax, realstar_idmax;
    105:   PetscObjectState *realcomposedstate, *realstarcomposedstate;
    106:   PetscReal        *realcomposeddata, **realstarcomposeddata;
    107: #if PetscDefined(USE_COMPLEX)
    108:   PetscInt          scalar_idmax, scalarstar_idmax;
    109:   PetscObjectState *scalarcomposedstate, *scalarstarcomposedstate;
    110:   PetscScalar      *scalarcomposeddata, **scalarstarcomposeddata;
    111: #endif
    112:   void (**fortran_func_pointers)(void);             /* used by Fortran interface functions to stash user provided Fortran functions */
    113:   PetscFortranCallbackId num_fortran_func_pointers; /* number of Fortran function pointers allocated */
    114:   PetscFortranCallback  *fortrancallback[PETSC_FORTRAN_CALLBACK_MAXTYPE];
    115:   PetscFortranCallbackId num_fortrancallback[PETSC_FORTRAN_CALLBACK_MAXTYPE];
    116:   void                  *python_context;
    117:   PetscErrorCode (*python_destroy)(void *);

    119:   PetscInt noptionhandler;
    120:   PetscErrorCode (*optionhandler[PETSC_MAX_OPTIONS_HANDLER])(PetscObject, PetscOptionItems *, void *);
    121:   PetscErrorCode (*optiondestroy[PETSC_MAX_OPTIONS_HANDLER])(PetscObject, void *);
    122:   void *optionctx[PETSC_MAX_OPTIONS_HANDLER];
    123: #if defined(PETSC_HAVE_SAWS)
    124:   PetscBool amsmem;          /* if PETSC_TRUE then this object is registered with SAWs and visible to clients */
    125:   PetscBool amspublishblock; /* if PETSC_TRUE and publishing objects then will block at PetscObjectSAWsBlock() */
    126: #endif
    127:   PetscOptions options; /* options database used, NULL means default */
    128:   PetscBool    optionsprinted;
    129:   PetscBool    donotPetscObjectPrintClassNamePrefixType;
    130:   PetscBool    persistent;
    131: } _p_PetscObject;

    133: #define PETSCHEADER(ObjectOps) \
    134:   _p_PetscObject hdr; \
    135:   ObjectOps      ops[1]

    137: #define PETSCFREEDHEADER -1

    139: /*S
    140:   PetscObjectDestroyFn - A prototype of a function that can destroy a `PetscObject`

    142:   Calling Sequence:
    143: . obj - the `PetscObject` to destroy

    145:   Level: beginner

    147:   Note:
    148:   The deprecated `PetscObjectDestroyFunction` works as a replacement for `PetscObjectDestroyFn` *.

    150: .seealso: `PetscObject`, `PetscObjectDestroy()`
    151: S*/
    152: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode(PetscObjectDestroyFn)(PetscObject *obj);

    154: PETSC_EXTERN_TYPEDEF typedef PetscObjectDestroyFn *PetscObjectDestroyFunction;

    156: /*S
    157:   PetscObjectViewFn - A prototype of a function that can view a `PetscObject`

    159:   Calling Sequence:
    160: + obj - the `PetscObject` to view
    161: - v - the viewer

    163:   Level: beginner

    165:   Note:
    166:   The deprecated `PetscObjectViewFunction` works as a replacement for `PetscObjectViewFn` *.

    168: .seealso: `PetscObject`, `PetscObjectDestroy()`, `PetscViewer`, `PetscObjectView()`
    169: S*/
    170: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode(PetscObjectViewFn)(PetscObject obj, PetscViewer v);

    172: PETSC_EXTERN_TYPEDEF typedef PetscObjectViewFn *PetscObjectViewFunction;

    174: /*MC
    175:     PetscHeaderCreate - Creates a raw PETSc object of a particular class

    177:   Synopsis:
    178: #include <petsc/private/petscimpl.h>
    179:   PetscErrorCode PetscHeaderCreate(PetscObject h, PetscClassId classid, const char class_name[], const char descr[], const char mansec[], MPI_Comm comm, PetscObjectDestroyFn * destroy, PetscObjectViewFn * view)

    181:   Input Parameters:
    182: + classid    - The classid associated with this object (for example `VEC_CLASSID`)
    183: . class_name - String name of class; should be static (for example "Vec"), may be
    184:                `PETSC_NULLPTR`
    185: . descr      - String containing short description; should be static (for example "Vector"),
    186:                may be `PETSC_NULLPTR`
    187: . mansec     - String indicating section in manual pages; should be static (for example "Vec"),
    188:                may be `PETSC_NULLPTR`
    189: . comm       - The MPI Communicator
    190: . destroy    - The destroy routine for this object (for example `VecDestroy()`)
    191: - view       - The view routine for this object (for example `VecView()`), may be
    192:                `PETSC_NULLPTR`

    194:   Output Parameter:
    195: . h - The newly created `PetscObject`

    197:   Level: developer

    199:   Notes:
    200:   Can only be used to create a `PetscObject`. A `PetscObject` is defined as a pointer to a
    201:   C/C++ structure which satisfies all of the following\:

    203:   1. The first member of the structure must be a `_p_PetscObject`.
    204:   2. C++ structures must be "Standard Layout". Generally speaking a standard layout class\:
    205:      - Has no virtual functions or base classes.
    206:      - Has only standard layout non-static members (if any).
    207:      - Has only standard layout base classes (if any).

    209:      See https://en.cppreference.com/w/cpp/language/classes#Standard-layout_class for further
    210:      information.

    212:   Example Usage:
    213:   Existing `PetscObject`s may be easily created as shown. Unless otherwise stated, a particular
    214:   objects `destroy` and `view` functions are exactly `<OBJECT_TYPE>Destroy()` and
    215:   `<OBJECT_TYPE>View()`.
    216: .vb
    217:   Vec v;

    219:   PetscHeaderCreate(v, VEC_CLASSID, "Vec", "A distributed vector class", "Vec", PETSC_COMM_WORLD, VecDestroy, VecView);
    220: .ve

    222:   It is possible to create custom `PetscObject`s, note however that they must abide by the
    223:   restrictions set forth above.
    224: .vb
    225:   // OK, first member of C structure is _p_PetscObject
    226:   struct MyCPetscObject_s
    227:   {
    228:     _p_PetscObject header;
    229:     int            some_data;
    230:   };
    231:   typedef struct *MyCPetscObject_s MyCPetscObject;

    233:   PetscErrorCode MyObjectDestroy(MyObject *);
    234:   PetscErrorCode MyObjectView(MyObject);

    236:   MyCPetscObject obj;

    238:   // assume MY_PETSC_CLASSID is already registered
    239:   PetscHeaderCreate(obj, MY_PETSC_CLASSID, "MyObject", "A custom PetscObject", PETSC_NULLPTR, PETSC_COMM_SELF, MyObjectDestroy, MyObjectView);

    241:   // OK, only destroy function must be given, all others may be NULL
    242:   PetscHeaderCreate(obj, MY_PETSC_CLASSID, PETSC_NULLPTR, PETSC_NULLPTR, PETSC_NULLPTR, PETSC_COMM_SELF, MyObjectDestroy, PETSC_NULLPTR);

    244:   // ERROR must be a single-level pointer
    245:   PetscHeaderCreate(&obj, ...);
    246: .ve

    248:   Illustrating proper construction from C++\:
    249: .vb
    250:   // ERROR, class is not standard layout, first member must be publicly accessible
    251:   class BadCppPetscObject
    252:   {
    253:     _p_PetscObject header;
    254:   };

    256:   // ERROR, class is not standard layout, has a virtual function and virtual inheritance
    257:   class BadCppPetscObject2 : virtual BaseClass
    258:   {
    259:   public:
    260:     _p_PetscObject header;

    262:     virtual void foo();
    263:   };

    265:   // ERROR, class is not standard layout! Has non-standard layout member
    266:   class BadCppPetscObject2
    267:   {
    268:   public:
    269:     _p_PetscObject    header;
    270:     BadCppPetscObject non_standard_layout;
    271:   };

    273:   // OK, class is standard layout!
    274:   class GoodCppPetscObject;
    275:   using MyCppObject = GoodCppPetscObject *;

    277:   // OK, non-virtual inheritance of other standard layout class does not affect layout
    278:   class GoodCppPetscObject : StandardLayoutClass
    279:   {
    280:   public:
    281:     // OK, non standard layout member is static, does not affect layout
    282:     static BadCppPetscObject non_standard_layout;

    284:     // OK, first non-static member is _p_PetscObject
    285:     _p_PetscObject header;

    287:      // OK, non-virtual member functions do not affect class layout
    288:     void foo();

    290:     // OK, may use "member" functions for destroy and view so long as they are static
    291:     static PetscErrorCode destroy(MyCppObject *);
    292:     static PetscErrorCode view(MyCppObject);
    293:   };

    295:   // OK, usage via pointer
    296:   MyObject obj;

    298:   PetscHeaderCreate(obj, MY_PETSC_CLASSID, "MyObject", "A custom C++ PetscObject", nullptr, PETSC_COMM_SELF, GoodCppPetscObject::destroy, GoodCppPetscObject::view);
    299: .ve

    301: .seealso: `PetscObject`, `PetscHeaderDestroy()`, `PetscClassIdRegister()`
    302: M*/
    303: #define PetscHeaderCreate(h, classid, class_name, descr, mansec, comm, destroy, view) \
    304:   PetscHeaderCreate_Function(PetscNew(&(h)), (PetscObject *)&(h), (classid), (class_name), (descr), (mansec), (comm), (PetscObjectDestroyFn *)(destroy), (PetscObjectViewFn *)(view))

    306: PETSC_EXTERN PetscErrorCode PetscHeaderCreate_Function(PetscErrorCode, PetscObject *, PetscClassId, const char[], const char[], const char[], MPI_Comm, PetscObjectDestroyFn *, PetscObjectViewFn *);
    307: PETSC_EXTERN PetscErrorCode PetscHeaderCreate_Private(PetscObject, PetscClassId, const char[], const char[], const char[], MPI_Comm, PetscObjectDestroyFn *, PetscObjectViewFn *);
    308: PETSC_EXTERN PetscErrorCode PetscHeaderDestroy_Function(PetscObject *);
    309: PETSC_EXTERN PetscErrorCode PetscComposedQuantitiesDestroy(PetscObject obj);
    310: PETSC_INTERN PetscObjectId  PetscObjectNewId_Internal(void);

    312: /*MC
    313:   PetscHeaderDestroy - Final step in destroying a `PetscObject`

    315:   Synopsis:
    316: #include <petsc/private/petscimpl.h>
    317:   PetscErrorCode PetscHeaderDestroy(PetscObject *obj)

    319:   Input Parameter:
    320: . h - A pointer to the header created with `PetscHeaderCreate()`

    322:   Level: developer

    324:   Notes:
    325:   `h` is freed and set to `PETSC_NULLPTR` when this routine returns.

    327:   Example Usage:
    328: .vb
    329:   PetscObject obj;

    331:   PetscHeaderCreate(obj, ...);
    332:   // use obj...

    334:   // note pointer to obj is used
    335:   PetscHeaderDestroy(&obj);
    336: .ve

    338:   Note that this routine is the _last_ step when destroying higher-level `PetscObject`s as it
    339:   deallocates the memory for the structure itself\:
    340: .vb
    341:   typedef struct MyPetscObject_s *MyPetscObject;
    342:   struct MyPetscObject_s
    343:   {
    344:     _p_PetscObject  hdr;
    345:     PetscInt       *foo;
    346:     PetscScalar    *bar;
    347:   };

    349:   // assume obj is created/initialized elsewhere...
    350:   MyPetscObject obj;

    352:   // OK, should dispose of all dynamically allocated resources before calling
    353:   // PetscHeaderDestroy()
    354:   PetscFree(obj->foo);

    356:   // OK, dispose of obj
    357:   PetscHeaderDestroy(&obj);

    359:   // ERROR, obj points to NULL here, accessing obj->bar may result in segmentation violation!
    360:   // obj->bar is potentially leaked!
    361:   PetscFree(obj->bar);
    362: .ve

    364: .seealso: `PetscObject`, `PetscHeaderCreate()`
    365: M*/
    366: #define PetscHeaderDestroy(h) PetscHeaderDestroy_Function((PetscObject *)h)

    368: PETSC_EXTERN PetscErrorCode                PetscHeaderDestroy_Private(PetscObject, PetscBool);
    369: PETSC_INTERN PetscErrorCode                PetscHeaderDestroy_Private_Unlogged(PetscObject, PetscBool);
    370: PETSC_SINGLE_LIBRARY_INTERN PetscErrorCode PetscHeaderReset_Internal(PetscObject);
    371: PETSC_EXTERN PetscErrorCode                PetscObjectCopyFortranFunctionPointers(PetscObject, PetscObject);
    372: PETSC_EXTERN PetscErrorCode                PetscObjectSetFortranCallback(PetscObject, PetscFortranCallbackType, PetscFortranCallbackId *, void (*)(void), void *ctx);
    373: PETSC_EXTERN PetscErrorCode                PetscObjectGetFortranCallback(PetscObject, PetscFortranCallbackType, PetscFortranCallbackId, void (**)(void), void **ctx);

    375: PETSC_INTERN PetscErrorCode PetscCitationsInitialize(void);
    376: PETSC_INTERN PetscErrorCode PetscFreeMPIResources(void);
    377: PETSC_INTERN PetscErrorCode PetscOptionsHasHelpIntro_Internal(PetscOptions, PetscBool *);

    379: /* Code shared between C and Fortran */
    380: PETSC_INTERN PetscErrorCode PetscInitialize_Common(const char *, const char *, const char *, PetscBool, PetscBool, PetscInt);

    382: #if PetscDefined(HAVE_SETJMP_H)
    383: PETSC_EXTERN PetscBool PetscCheckPointer(const void *, PetscDataType);
    384: #else
    385:   #define PetscCheckPointer(ptr, data_type) (ptr ? PETSC_TRUE : PETSC_FALSE)
    386: #endif

    388: #if defined(PETSC_CLANG_STATIC_ANALYZER)
    389: template <typename T>
    391: template <typename T>
    393: template <typename T>
    395: template <typename T>
    396: extern void PetscAssertPointer(T, int)
    397: {
    398: }
    399: template <typename T>
    401: #else
    402:   // Macros to test if a PETSc object is valid and if pointers are valid
    403:   #if PetscDefined(USE_DEBUG)
    404:     /*  This check is for subtype methods such as DMDAGetCorners() that do not use the PetscTryMethod() or PetscUseMethod() paradigm */
    406:       do { \
    407:         PetscBool _7_same; \
    409:         PetscCall(PetscObjectTypeCompare((PetscObject)(h), t, &_7_same)); \
    410:         PetscCheck(_7_same, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Wrong subtype object:Parameter # %d must have implementation %s it is %s", arg, t, ((PetscObject)(h))->type_name); \
    411:       } while (0)

    413:     #define PetscAssertPointer_Internal(ptr, arg, ptype, ptrtype) \
    414:       do { \
    415:         PetscCheck(ptr, PETSC_COMM_SELF, PETSC_ERR_ARG_NULL, "Null Pointer: Parameter # %d", arg); \
    416:         PetscCheck(PetscCheckPointer(ptr, ptype), PETSC_COMM_SELF, PETSC_ERR_ARG_BADPTR, "Invalid Pointer to %s: Argument '" PetscStringize(ptr) "' (parameter # %d)", ptrtype, arg); \
    417:       } while (0)

    420:       do { \
    421:         PetscAssertPointer_Internal(h, arg, PETSC_OBJECT, "PetscObject"); \
    422:         if (((PetscObject)(h))->classid != ck) { \
    423:           PetscCheck(((PetscObject)(h))->classid != PETSCFREEDHEADER, PETSC_COMM_SELF, PETSC_ERR_ARG_CORRUPT, "Object already free: Parameter # %d", arg); \
    424:           SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Wrong type of object: Parameter # %d", arg); \
    425:         } \
    426:       } while (0)

    429:       do { \
    430:         PetscAssertPointer_Internal(h, arg, PETSC_OBJECT, "PetscObject"); \
    431:         PetscCheck(((PetscObject)(h))->classid != PETSCFREEDHEADER, PETSC_COMM_SELF, PETSC_ERR_ARG_CORRUPT, "Object already free: Parameter # %d", arg); \
    432:         PetscCheck(((PetscObject)(h))->classid >= PETSC_SMALLEST_CLASSID && ((PetscObject)(h))->classid <= PETSC_LARGEST_CLASSID, PETSC_COMM_SELF, PETSC_ERR_ARG_CORRUPT, "Invalid type of object: Parameter # %d", arg); \
    433:       } while (0)

    435:     #if defined(__cplusplus)
    436:       #include <type_traits> // std::decay

    438: namespace Petsc
    439: {

    441: namespace util
    442: {

    444: template <typename T>
    445: struct PetscAssertPointerImpl {
    446:   PETSC_NODISCARD static constexpr PetscDataType type() noexcept { return PETSC_CHAR; }
    447:   PETSC_NODISCARD static constexpr const char   *string() noexcept { return "memory"; }
    448: };

    450:       #define PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(T, PETSC_TYPE) \
    451:         template <> \
    452:         struct PetscAssertPointerImpl<T *> { \
    453:           PETSC_NODISCARD static constexpr PetscDataType type() noexcept \
    454:           { \
    455:             return PETSC_TYPE; \
    456:           } \
    457:           PETSC_NODISCARD static constexpr const char *string() noexcept \
    458:           { \
    459:             return PetscStringize(T); \
    460:           } \
    461:         }; \
    462:         template <> \
    463:         struct PetscAssertPointerImpl<const T *> : PetscAssertPointerImpl<T *> { }; \
    464:         template <> \
    465:         struct PetscAssertPointerImpl<volatile T *> : PetscAssertPointerImpl<T *> { }; \
    466:         template <> \
    467:         struct PetscAssertPointerImpl<const volatile T *> : PetscAssertPointerImpl<T *> { }

    469: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(char, PETSC_CHAR);
    470: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(signed char, PETSC_CHAR);
    471: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(unsigned char, PETSC_CHAR);
    472: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(short, PETSC_SHORT);
    473: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(unsigned short, PETSC_SHORT);
    474: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(PetscBool, PETSC_BOOL);
    475: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(float, PETSC_FLOAT);
    476: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(double, PETSC_DOUBLE);
    477: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(int32_t, PETSC_INT32);
    478: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(uint32_t, PETSC_INT32);
    479: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(int64_t, PETSC_INT64);
    480: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(uint64_t, PETSC_INT64);
    481:       #if defined(PETSC_HAVE_COMPLEX)
    482: PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION(PetscComplex, PETSC_COMPLEX);
    483:       #endif

    485:       #undef PETSC_ASSERT_POINTER_IMPL_SPECIALIZATION

    487: } // namespace util

    489: } // namespace Petsc

    491:       #define PetscAssertPointer_PetscDataType(h) ::Petsc::util::PetscAssertPointerImpl<typename std::decay<decltype(h)>::type>::type()
    492:       #define PetscAssertPointer_String(h)        ::Petsc::util::PetscAssertPointerImpl<typename std::decay<decltype(h)>::type>::string()

    494:     #elif PETSC_C_VERSION >= 11
    495:       #define PETSC_GENERIC_CV(type, result) type * : result, const type * : result, volatile type * : result, const volatile type * : result

    497:       #if PetscDefined(HAVE_COMPLEX)
    498:         #define PETSC_GENERIC_CV_COMPLEX(result) PETSC_GENERIC_CV(PetscComplex, result)
    499:       #else
    500:         #define PETSC_GENERIC_CV_COMPLEX(result)
    501:       #endif

    503:       #define PetscAssertPointer_PetscDataType(h) \
    504:         _Generic((h), \
    505:           default: PETSC_CHAR, \
    506:           PETSC_GENERIC_CV(          char, PETSC_CHAR), \
    507:           PETSC_GENERIC_CV(   signed char, PETSC_CHAR), \
    508:           PETSC_GENERIC_CV( unsigned char, PETSC_CHAR), \
    509:           PETSC_GENERIC_CV(         short, PETSC_SHORT), \
    510:           PETSC_GENERIC_CV(unsigned short, PETSC_SHORT), \
    511:           PETSC_GENERIC_CV(         float, PETSC_FLOAT), \
    512:           PETSC_GENERIC_CV(        double, PETSC_DOUBLE), \
    513:           PETSC_GENERIC_CV(       int32_t, PETSC_INT32), \
    514:           PETSC_GENERIC_CV(      uint32_t, PETSC_INT32), \
    515:           PETSC_GENERIC_CV(       int64_t, PETSC_INT64), \
    516:           PETSC_GENERIC_CV(      uint64_t, PETSC_INT64), \
    517:           PETSC_GENERIC_CV_COMPLEX(PETSC_COMPLEX))

    519:       #define PETSC_GENERIC_CV_STRINGIZE(type) PETSC_GENERIC_CV(type, PetscStringize(type))

    521:       #if PetscDefined(HAVE_COMPLEX)
    522:         #define PETSC_GENERIC_CV_STRINGIZE_COMPLEX PETSC_GENERIC_CV_STRINGIZE(PetscComplex)
    523:       #else
    524:         #define PETSC_GENERIC_CV_STRINGIZE_COMPLEX
    525:       #endif

    527:       #define PetscAssertPointer_String(h) \
    528:         _Generic((h), \
    529:           default: "memory", \
    530:           PETSC_GENERIC_CV_STRINGIZE(char), \
    531:           PETSC_GENERIC_CV_STRINGIZE(signed char), \
    532:           PETSC_GENERIC_CV_STRINGIZE(unsigned char), \
    533:           PETSC_GENERIC_CV_STRINGIZE(short), \
    534:           PETSC_GENERIC_CV_STRINGIZE(unsigned short), \
    535:           PETSC_GENERIC_CV_STRINGIZE(float), \
    536:           PETSC_GENERIC_CV_STRINGIZE(double), \
    537:           PETSC_GENERIC_CV_STRINGIZE(int32_t), \
    538:           PETSC_GENERIC_CV_STRINGIZE(uint32_t), \
    539:           PETSC_GENERIC_CV_STRINGIZE(int64_t), \
    540:           PETSC_GENERIC_CV_STRINGIZE(uint64_t), \
    541:           PETSC_GENERIC_CV_STRINGIZE_COMPLEX)
    542:     #else // PETSC_C_VERSION >= 11 || defined(__cplusplus)
    543:       #define PetscAssertPointer_PetscDataType(h) PETSC_CHAR
    544:       #define PetscAssertPointer_String(h)        "memory"
    545:     #endif // PETSC_C_VERSION >= 11 || defined(__cplusplus)
    546:     #define PetscAssertPointer(h, arg) PetscAssertPointer_Internal(h, arg, PetscAssertPointer_PetscDataType(h), PetscAssertPointer_String(h))
    548:   #else // PetscDefined(USE_DEBUG)
    550:       do { \
    551:         (void)(h); \
    552:       } while (0)
    554:       do { \
    555:         (void)(h); \
    556:       } while (0)
    558:       do { \
    559:         (void)(h); \
    560:       } while (0)
    561:     #define PetscAssertPointer(h, arg) \
    562:       do { \
    563:         (void)(h); \
    564:       } while (0)
    566:       do { \
    567:         (void)(h); \
    568:       } while (0)
    569:   #endif // PetscDefined(USE_DEBUG)
    570: #endif   // PETSC_CLANG_STATIC_ANALYZER

    581: #define PetscSorted(n, idx, sorted) \
    582:   do { \
    583:     (sorted) = PETSC_TRUE; \
    584:     for (PetscInt _i_ = 1; _i_ < (n); ++_i_) { \
    585:       if ((idx)[_i_] < (idx)[_i_ - 1]) { \
    586:         (sorted) = PETSC_FALSE; \
    587:         break; \
    588:       } \
    589:     } \
    590:   } while (0)

    592: #if !defined(PETSC_CLANG_STATIC_ANALYZER)
    593:   #if !defined(PETSC_USE_DEBUG)

    595:     #define PetscCheckSameType(a, arga, b, argb) \
    596:       do { \
    597:         (void)(a); \
    598:         (void)(b); \
    599:       } while (0)
    600:     #define PetscCheckTypeName(a, type) \
    601:       do { \
    602:         (void)(a); \
    603:       } while (0)
    604:     #define PetscCheckTypeNames(a, type1, type2) \
    605:       do { \
    606:         (void)(a); \
    607:       } while (0)
    609:       do { \
    610:         (void)(a); \
    611:       } while (0)
    612:     #define PetscCheckSameComm(a, arga, b, argb) \
    613:       do { \
    614:         (void)(a); \
    615:         (void)(b); \
    616:       } while (0)
    617:     #define PetscCheckSameTypeAndComm(a, arga, b, argb) \
    618:       do { \
    619:         (void)(a); \
    620:         (void)(b); \
    621:       } while (0)
    623:       do { \
    624:         (void)(a); \
    625:         (void)(b); \
    626:       } while (0)
    628:       do { \
    629:         (void)(a); \
    630:         (void)(b); \
    631:       } while (0)
    633:       do { \
    634:         (void)(a); \
    635:         (void)(b); \
    636:       } while (0)
    638:       do { \
    639:         (void)(a); \
    640:         (void)(b); \
    641:       } while (0)
    643:       do { \
    644:         (void)(a); \
    645:         (void)(b); \
    646:       } while (0)
    648:       do { \
    649:         (void)(a); \
    650:         (void)(b); \
    651:       } while (0)
    652:     #define PetscCheckSorted(n, idx) \
    653:       do { \
    654:         (void)(n); \
    655:         (void)(idx); \
    656:       } while (0)

    658:   #else

    660:     /*
    661:   This macro currently does nothing, the plan is for each PetscObject to have a PetscInt "type"
    662:   member associated with the string type_name that can be quickly compared.

    664:   **Do not swap this macro to compare string type_name!**

    666:   This macro is used incorrectly in the code. Many places that do not need identity of the
    667:   types incorrectly call this check and would need to be fixed if this macro is enabled.
    668: */
    669:     #if 0
    670:       #define PetscCheckSameType(a, arga, b, argb) \
    671:         do { \
    672:           PetscBool pcst_type_eq_ = PETSC_TRUE; \
    673:           PetscCall(PetscStrcmp(((PetscObject)(a))->type_name, ((PetscObject)(b))->type_name, &pcst_type_eq_)); \
    674:           PetscCheck(pcst_type_eq_, PETSC_COMM_SELF, PETSC_ERR_ARG_NOTSAMETYPE, "Objects not of same type : Argument # % d and % d, % s != % s ", arga, argb, ((PetscObject)(a))->type_name, ((PetscObject)(b))->type_name); \
    675:         } while (0)
    676:     #else
    677:       #define PetscCheckSameType(a, arga, b, argb) \
    678:         do { \
    679:           (void)(a); \
    680:           (void)(b); \
    681:         } while (0)
    682:     #endif

    684:     /*
    685:     Check type_name
    686: */
    687:     #define PetscCheckTypeName(a, type) \
    688:       do { \
    689:         PetscBool _7_match; \
    690:         PetscCall(PetscObjectTypeCompare(((PetscObject)(a)), (type), &_7_match)); \
    691:         PetscCheck(_7_match, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Object (%s) is not %s", (char *)(((PetscObject)(a))->type_name), type); \
    692:       } while (0)

    694:     #define PetscCheckTypeNames(a, type1, type2) \
    695:       do { \
    696:         PetscBool _7_match; \
    697:         PetscCall(PetscObjectTypeCompareAny(((PetscObject)(a)), &_7_match, (type1), (type2), "")); \
    698:         PetscCheck(_7_match, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Object (%s) is not %s or %s", (char *)(((PetscObject)(a))->type_name), type1, type2); \
    699:       } while (0)

    701:     /*
    702:    Use this macro to check if the type is set
    703: */

    706:     /*
    707:    Sometimes object must live on same communicator to inter-operate
    708: */
    709:     #define PetscCheckSameComm(a, arga, b, argb) \
    710:       do { \
    711:         PetscMPIInt _7_flag; \
    712:         PetscCallMPI(MPI_Comm_compare(PetscObjectComm((PetscObject)(a)), PetscObjectComm((PetscObject)(b)), &_7_flag)); \
    713:         PetscCheck(_7_flag == MPI_CONGRUENT || _7_flag == MPI_IDENT, PETSC_COMM_SELF, PETSC_ERR_ARG_NOTSAMECOMM, "Different communicators in the two objects: Argument # %d and %d flag %d", arga, argb, _7_flag); \
    714:       } while (0)

    716:     #define PetscCheckSameTypeAndComm(a, arga, b, argb) \
    717:       do { \
    718:         PetscCheckSameType(a, arga, b, argb); \
    719:         PetscCheckSameComm(a, arga, b, argb); \
    720:       } while (0)

    723:       do { \
    724:         PetscScalar b0 = (b); \
    725:         PetscReal   b1[5], b2[5]; \
    726:         if (PetscIsNanScalar(b0)) { \
    727:           b1[4] = 1; \
    728:         } else { \
    729:           b1[4] = 0; \
    730:         }; \
    731:         b1[0] = -PetscRealPart(b0); \
    732:         b1[1] = PetscRealPart(b0); \
    733:         b1[2] = -PetscImaginaryPart(b0); \
    734:         b1[3] = PetscImaginaryPart(b0); \
    735:         PetscCall(MPIU_Allreduce(b1, b2, 5, MPIU_REAL, MPIU_MAX, PetscObjectComm((PetscObject)(a)))); \
    736:         PetscCheck(b2[4] > 0 || (PetscEqualReal(-b2[0], b2[1]) && PetscEqualReal(-b2[2], b2[3])), PetscObjectComm((PetscObject)(a)), PETSC_ERR_ARG_WRONG, "Scalar value must be same on all processes, argument # %d", arg); \
    737:       } while (0)

    740:       do { \
    741:         PetscReal b0 = (b), b1[3], b2[3]; \
    742:         if (PetscIsNanReal(b0)) { \
    743:           b1[2] = 1; \
    744:         } else { \
    745:           b1[2] = 0; \
    746:         }; \
    747:         b1[0] = -b0; \
    748:         b1[1] = b0; \
    749:         PetscCall(MPIU_Allreduce(b1, b2, 3, MPIU_REAL, MPIU_MAX, PetscObjectComm((PetscObject)(a)))); \
    750:         PetscCheck(b2[2] > 0 || PetscEqualReal(-b2[0], b2[1]), PetscObjectComm((PetscObject)(a)), PETSC_ERR_ARG_WRONG, "Real value must be same on all processes, argument # %d", arg); \
    751:       } while (0)

    754:       do { \
    755:         PetscInt b0 = (b), b1[2], b2[2]; \
    756:         b1[0]       = -b0; \
    757:         b1[1]       = b0; \
    758:         PetscCall(MPIU_Allreduce(b1, b2, 2, MPIU_INT, MPI_MAX, PetscObjectComm((PetscObject)(a)))); \
    759:         PetscCheck(-b2[0] == b2[1], PetscObjectComm((PetscObject)(a)), PETSC_ERR_ARG_WRONG, "Int value must be same on all processes, argument # %d", arg); \
    760:       } while (0)

    763:       do { \
    764:         PetscMPIInt b0 = (b), b1[2], b2[2]; \
    765:         b1[0]          = -b0; \
    766:         b1[1]          = b0; \
    767:         PetscCall(MPIU_Allreduce(b1, b2, 2, MPI_INT, MPI_MAX, PetscObjectComm((PetscObject)(a)))); \
    768:         PetscCheck(-b2[0] == b2[1], PetscObjectComm((PetscObject)(a)), PETSC_ERR_ARG_WRONG, "PetscMPIInt value must be same on all processes, argument # %d", arg); \
    769:       } while (0)

    772:       do { \
    773:         PetscMPIInt b0 = (PetscMPIInt)(b), b1[2], b2[2]; \
    774:         b1[0]          = -b0; \
    775:         b1[1]          = b0; \
    776:         PetscCall(MPIU_Allreduce(b1, b2, 2, MPI_INT, MPI_MAX, PetscObjectComm((PetscObject)(a)))); \
    777:         PetscCheck(-b2[0] == b2[1], PetscObjectComm((PetscObject)(a)), PETSC_ERR_ARG_WRONG, "Bool value must be same on all processes, argument # %d", arg); \
    778:       } while (0)

    781:       do { \
    782:         PetscMPIInt b0 = (PetscMPIInt)(b), b1[2], b2[2]; \
    783:         b1[0]          = -b0; \
    784:         b1[1]          = b0; \
    785:         PetscCall(MPIU_Allreduce(b1, b2, 2, MPI_INT, MPI_MAX, PetscObjectComm((PetscObject)(a)))); \
    786:         PetscCheck(-b2[0] == b2[1], PetscObjectComm((PetscObject)(a)), PETSC_ERR_ARG_WRONG, "Enum value must be same on all processes, argument # %d", arg); \
    787:       } while (0)

    789:     #define PetscCheckSorted(n, idx) \
    790:       do { \
    791:         PetscBool _1_flg; \
    792:         PetscSorted(n, idx, _1_flg); \
    793:         PetscCheck(_1_flg, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Input array needs to be sorted"); \
    794:       } while (0)

    796:   #endif
    797: #else  /* PETSC_CLANG_STATIC_ANALYZER */
    798: template <typename Ta, typename Tb>
    799: extern void PetscCheckSameType(Ta, int, Tb, int);
    800: template <typename Ta, typename Tb>
    801: extern void PetscCheckTypeName(Ta, Tb);
    802: template <typename Ta, typename Tb, typename Tc>
    803: extern void PetscCheckTypeNames(Ta, Tb, Tc);
    804: template <typename T>
    806: template <typename Ta, typename Tb>
    807: extern void PetscCheckSameComm(Ta, int, Tb, int);
    808: template <typename Ta, typename Tb>
    809: extern void PetscCheckSameTypeAndComm(Ta, int, Tb, int);
    810: template <typename Ta, typename Tb>
    812: template <typename Ta, typename Tb>
    814: template <typename Ta, typename Tb>
    816: template <typename Ta, typename Tb>
    818: template <typename Ta, typename Tb>
    820: template <typename Ta, typename Tb>
    822: template <typename T>
    823: extern void PetscCheckSorted(PetscInt, T);
    824: #endif /* PETSC_CLANG_STATIC_ANALYZER */

    826: /*MC
    827:    PetscTryMethod - Queries a `PetscObject` for a method added with `PetscObjectComposeFunction()`, if it exists then calls it.

    829:   Synopsis:
    830:    #include "petsc/private/petscimpl.h"
    831:    PetscTryMethod(PetscObject obj, const char *name, (arg_types), (arg_value))

    833:    Input Parameters:
    834: +   obj - the object, for example a `Mat`, that does not need to be cast to `PetscObject`
    835: .   name - the name of the method, for example, "KSPGMRESSetRestart_C" for the function `KSPGMRESSetRestart()`
    836: .   arg_types - the argument types for the method, for example, (KSP,PetscInt)
    837: -   args - the arguments for the method, for example, (ksp,restart))

    839:    Level: developer

    841:    Notes:
    842:    This does not return an error code, it is a macro that returns from the subroutine with an error code on error.

    844:    Use `PetscUseTypeMethod()` or `PetscTryTypeMethod()` to call functions that are included in the object's function table, the `ops` array
    845:    in the object.

    847: .seealso: `PetscUseMethod()`, `PetscCall()`, `PetscUseTypeMethod()`, `PetscTryTypeMethod()`, `PetscCheck()`, `PetscObject`
    848: M*/
    849: #define PetscTryMethod(obj, A, B, C) \
    850:   do { \
    851:     PetscErrorCode(*_7_f) B; \
    852:     PetscCall(PetscObjectQueryFunction((PetscObject)(obj), A, &_7_f)); \
    853:     if (_7_f) PetscCall((*_7_f)C); \
    854:   } while (0)

    856: /*MC
    857:    PetscUseMethod - Queries a `PetscObject` for a method added with `PetscObjectComposeFunction()`, if it exists then calls it, otherwise generates an error.

    859:   Synopsis:
    860:    #include "petsc/private/petscimpl.h"
    861:    PetscUseMethod(PetscObject obj, const char *name, (arg_types), (arg_value))

    863:    Input Parameters:
    864: +   obj - the object, for example a `Mat`, that does not need to be cast to `PetscObject`
    865: .   name - the name of the method, for example, "KSPGMRESSetRestart_C" for the function `KSPGMRESSetRestart()`
    866: .   arg_types - the argument types for the method, for example, (KSP,PetscInt)
    867: -   args - the arguments for the method, for example, (ksp,restart))

    869:    Level: developer

    871:    Notes:
    872:    This does not return an error code, it is a macro that returns from the subroutine with an error code on error.

    874:    Use `PetscUseTypeMethod()` or `PetscTryTypeMethod()` to call functions that are included in the object's function table, the `ops` array
    875:    in the object.

    877: .seealso: `PetscTryMethod()`, `PetscCall()`, `PetscUseTypeMethod()`, `PetscTryTypeMethod()`, `PetscCheck()`, `PetscObject`
    878: M*/
    879: #define PetscUseMethod(obj, A, B, C) \
    880:   do { \
    881:     PetscErrorCode(*_7_f) B; \
    882:     PetscCall(PetscObjectQueryFunction((PetscObject)(obj), A, &_7_f)); \
    883:     PetscCheck(_7_f, PetscObjectComm((PetscObject)(obj)), PETSC_ERR_SUP, "Cannot locate function %s in object", A); \
    884:     PetscCall((*_7_f)C); \
    885:   } while (0)

    887: /*
    888:   Use Microsoft traditional preprocessor.

    890:   The Microsoft compiler option -Zc:preprocessor available in recent versions of the compiler
    891:   sets  _MSVC_TRADITIONAL to zero so this code path is not used.

    893:   It appears the Intel Microsoft Windows compiler icl does not have an equivalent of -Zc:preprocessor

    895:   These macros use the trick that Windows compilers remove the , before the __VA_ARGS__ if __VA_ARGS__ does not exist

    897:   PetscCall() cannot be used in the macros because the remove the , trick does not work in a macro in a macro
    898: */
    899: #if (defined(_MSC_VER) && (!defined(_MSVC_TRADITIONAL) || _MSVC_TRADITIONAL)) || defined(__ICL)

    901:   #define PetscUseTypeMethod(obj, OP, ...) \
    902:     do { \
    903:       PetscErrorCode ierr_p_; \
    904:       PetscStackUpdateLine; \
    905:       PetscCheck((obj)->ops->OP, PetscObjectComm((PetscObject)obj), PETSC_ERR_SUP, "No method %s for %s of type %s", PetscStringize(OP), ((PetscObject)obj)->class_name, ((PetscObject)obj)->type_name); \
    906:       ierr_p_ = (*(obj)->ops->OP)(obj, __VA_ARGS__); \
    907:       PetscCall(ierr_p_); \
    908:     } while (0)

    910:   #define PetscTryTypeMethod(obj, OP, ...) \
    911:     do { \
    912:       if ((obj)->ops->OP) { \
    913:         PetscErrorCode ierr_p_; \
    914:         PetscStackUpdateLine; \
    915:         ierr_p_ = (*(obj)->ops->OP)(obj, __VA_ARGS__); \
    916:         PetscCall(ierr_p_); \
    917:       } \
    918:     } while (0)

    920: #else

    922:   /*MC
    923:    PetscUseTypeMethod - Call a method on a `PetscObject`, that is a function in the objects function table `obj->ops`, error if the method does not exist

    925:   Synopsis:
    926:    #include "petsc/private/petscimpl.h"
    927:    PetscUseTypeMethod(obj, method, other_args)

    929:    Input Parameters:
    930: +   obj - the object, for example a `Mat`, that does not need to be cast to `PetscObject`
    931: .   method - the name of the method, for example, mult for the PETSc routine `MatMult()`
    932: -   other_args - the other arguments for the method, `obj` is the first argument

    934:    Level: developer

    936:    Note:
    937:    This does not return an error code, it is a macro that returns from the subroutine with an error code on error.

    939:    Use `PetscUseMethod()` or `PetscTryMethod()` to call functions that have been composed to an object with `PetscObjectComposeFunction()`

    941: .seealso: `PetscTryMethod()`, `PetscUseMethod()`, `PetscCall()`, `PetscCheck()`, `PetscTryTypeMethod()`, `PetscCallBack()`
    942: M*/
    943:   #define PetscUseTypeMethod(obj, ...) \
    944:     do { \
    945:       PetscCheck((obj)->ops->PETSC_FIRST_ARG((__VA_ARGS__, unused)), PetscObjectComm((PetscObject)obj), PETSC_ERR_SUP, "No method %s for %s of type %s", \
    946:                  PetscStringize(PETSC_FIRST_ARG((__VA_ARGS__,unused))), ((PetscObject)obj)->class_name, ((PetscObject)obj)->type_name); \
    947:       PetscCall((*(obj)->ops->PETSC_FIRST_ARG((__VA_ARGS__, unused)))(obj PETSC_REST_ARG(__VA_ARGS__))); \
    948:     } while (0)

    950:   /*MC
    951:    PetscTryTypeMethod - Call a method on a `PetscObject`, that is a function in the objects function table `obj->ops`, skip if the method does not exist

    953:   Synopsis:
    954:    #include "petsc/private/petscimpl.h"
    955:    PetscTryTypeMethod(obj, method, other_args)

    957:    Input Parameters:
    958: +   obj - the object, for example a `Mat`, that does not need to be cast to `PetscObject`
    959: .   method - the name of the method, for example, mult for the PETSc routine `MatMult()`
    960: -   other_args - the other arguments for the method, `obj` is the first argument

    962:    Level: developer

    964:    Note:
    965:    This does not return an error code, it is a macro that returns from the subroutine with an error code on error.

    967:    Use `PetscUseMethod()` or `PetscTryMethod()` to call functions that have been composed to an object with `PetscObjectComposeFunction()`

    969: .seealso: `PetscTryMethod()`, `PetscUseMethod()`, `PetscCall()`, `PetscCheck()`, `PetscUseTypeMethod()`
    970: M*/
    971:   #define PetscTryTypeMethod(obj, ...) \
    972:     do { \
    973:       if ((obj)->ops->PETSC_FIRST_ARG((__VA_ARGS__, unused))) PetscCall((*(obj)->ops->PETSC_FIRST_ARG((__VA_ARGS__, unused)))(obj PETSC_REST_ARG(__VA_ARGS__))); \
    974:     } while (0)

    976: #endif

    978: /*MC
    979:    PetscObjectStateIncrease - Increases the state of any `PetscObject`

    981:    Synopsis:
    982:    #include "petsc/private/petscimpl.h"
    983:    PetscErrorCode PetscObjectStateIncrease(PetscObject obj)

    985:    Logically Collective

    987:    Input Parameter:
    988: .  obj - any PETSc object, for example a `Vec`, `Mat` or `KSP`. This must be
    989:          cast with a (PetscObject), for example,
    990:          `PetscObjectStateIncrease`((`PetscObject`)mat);

    992:    Level: developer

    994:    Notes:
    995:    Object state is a 64-bit integer which gets increased every time
    996:    the object is changed internally. By saving and later querying the object state
    997:    one can determine whether information about the object is still current.
    998:    Currently, state is maintained for `Vec` and `Mat` objects.

    1000:    This routine is mostly for internal use by PETSc; a developer need only
    1001:    call it after explicit access to an object's internals. Routines such
    1002:    as `VecSet()` or `MatScale()` already call this routine. It is also called, as a
    1003:    precaution, in `VecRestoreArray()`, `MatRestoreRow()`, `MatDenseRestoreArray()`.

    1005:    Routines such as `VecNorm()` can by-pass the computation if the norm has already been computed and the vector's state has not changed.

    1007:    This routine is logically collective because state equality comparison needs to be possible without communication.

    1009:    `Mat` also has `MatGetNonzeroState()` for tracking changes to the nonzero structure.

    1011: .seealso: `PetscObjectStateGet()`, `PetscObject`
    1012: M*/
    1013: #define PetscObjectStateIncrease(obj) ((obj)->state++, PETSC_SUCCESS)

    1015: PETSC_EXTERN PetscErrorCode PetscObjectStateGet(PetscObject, PetscObjectState *);
    1016: PETSC_EXTERN PetscErrorCode PetscObjectStateSet(PetscObject, PetscObjectState);
    1017: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataRegister(PetscInt *);
    1018: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataIncreaseInt(PetscObject);
    1019: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataIncreaseIntstar(PetscObject);
    1020: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataIncreaseReal(PetscObject);
    1021: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataIncreaseRealstar(PetscObject);
    1022: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataIncreaseScalar(PetscObject);
    1023: PETSC_EXTERN PetscErrorCode PetscObjectComposedDataIncreaseScalarstar(PetscObject);
    1024: PETSC_EXTERN PetscInt       PetscObjectComposedDataMax;

    1026: /*MC
    1027:    PetscObjectComposedDataSetInt - attach `PetscInt` data to a `PetscObject` that may be later accessed with `PetscObjectComposedDataGetInt()`

    1029:    Synopsis:
    1030:    #include "petsc/private/petscimpl.h"
    1031:    PetscErrorCode PetscObjectComposedDataSetInt(PetscObject obj, PetscInt id, PetscInt data)

    1033:    Not Collective

    1035:    Input Parameters:
    1036: +  obj - the object to which data is to be attached
    1037: .  id - the identifier for the data
    1038: -  data - the data to  be attached, a `PetscInt`

    1040:    Level: developer

    1042:    Notes:
    1043:    The `data` identifier can be created through a call to `PetscObjectComposedDataRegister()`

    1045:    This allows the efficient composition of a single integer value with a `PetscObject`. Complex data may be
    1046:    attached with `PetscObjectCompose()`

    1048: .seealso: `PetscObjectComposedDataGetInt()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetReal()`,
    1049:           `PetscObjectComposedDataGetIntstar()`, `PetscObjectComposedDataSetIntstar()`, `PetscObject`,
    1050:           `PetscObjectCompose()`, `PetscObjectQuery()`
    1051: M*/
    1052: #define PetscObjectComposedDataSetInt(obj, id, data) \
    1053:   ((PetscErrorCode)((((obj)->int_idmax < PetscObjectComposedDataMax) && PetscObjectComposedDataIncreaseInt(obj)) || ((obj)->intcomposeddata[id] = data, (obj)->intcomposedstate[id] = (obj)->state, PETSC_SUCCESS)))

    1055: /*MC
    1056:    PetscObjectComposedDataGetInt - retrieve `PetscInt` data attached to a `PetscObject` `PetscObjectComposedDataSetInt()`

    1058:    Synopsis:
    1059:    #include "petsc/private/petscimpl.h"
    1060:    PetscErrorCode PetscObjectComposedDataGetInt(PetscObject obj, PetscInt id, PetscInt data, PetscBool flag)

    1062:    Not Collective

    1064:    Input Parameters:
    1065: +  obj - the object from which data is to be retrieved
    1066: -  id - the identifier for the data

    1068:    Output Parameters:
    1069: +  data - the data to be retrieved, a `PetscInt`
    1070: -  flag - `PETSC_TRUE` if the data item exists and is valid, `PETSC_FALSE` otherwise

    1072:    Level: developer

    1074:    Notes:
    1075:    The `data` and `flag` variables are inlined, so they are not pointers.

    1077: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetReal()`,
    1078:           `PetscObjectComposedDataGetIntstar()`, `PetscObjectComposedDataSetIntstar()`, `PetscObject`,
    1079:           `PetscObjectCompose()`, `PetscObjectQuery()`
    1080: M*/
    1081: #define PetscObjectComposedDataGetInt(obj, id, data, flag) (((obj)->intcomposedstate ? (data = (obj)->intcomposeddata[id], flag = (PetscBool)((obj)->intcomposedstate[id] == (obj)->state)) : (flag = PETSC_FALSE)), PETSC_SUCCESS)

    1083: /*MC
    1084:    PetscObjectComposedDataSetIntstar - attach `PetscInt` array data to a `PetscObject` that may be accessed later with `PetscObjectComposedDataGetIntstar()`

    1086:    Synopsis:
    1087:    #include "petsc/private/petscimpl.h"
    1088:    PetscErrorCode PetscObjectComposedDataSetIntstar(PetscObject obj, PetscInt id, PetscInt *data)

    1090:    Not Collective

    1092:    Input Parameters:
    1093: +  obj - the object to which data is to be attached
    1094: .  id - the identifier for the data
    1095: -  data - the data to  be attached, a `PetscInt` array

    1097:    Level: developer

    1099:    Notes:
    1100:    The `data` identifier can be determined through a call to `PetscObjectComposedDataRegister()`

    1102:    The length of the array accessed must be known, it is not available through this API.

    1104: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetReal()`,
    1105:           `PetscObjectComposedDataGetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1106:           `PetscObjectCompose()`, `PetscObjectQuery()`
    1107: M*/
    1108: #define PetscObjectComposedDataSetIntstar(obj, id, data) \
    1109:   ((PetscErrorCode)((((obj)->intstar_idmax < PetscObjectComposedDataMax) && PetscObjectComposedDataIncreaseIntstar(obj)) || ((obj)->intstarcomposeddata[id] = data, (obj)->intstarcomposedstate[id] = (obj)->state, PETSC_SUCCESS)))

    1111: /*MC
    1112:    PetscObjectComposedDataGetIntstar - retrieve `PetscInt` array data attached to a `PetscObject` with `PetscObjectComposedDataSetIntstar()`

    1114:    Synopsis:
    1115:    #include "petsc/private/petscimpl.h"
    1116:    PetscErrorCode PetscObjectComposedDataGetIntstar(PetscObject obj, PetscInt id, PetscInt *data, PetscBool flag)

    1118:    Not Collective

    1120:    Input Parameters:
    1121: +  obj - the object from which data is to be retrieved
    1122: -  id - the identifier for the data

    1124:    Output Parameters:
    1125: +  data - the data to be retrieved, a `PetscInt` array
    1126: -  flag - `PETSC_TRUE` if the data item exists and is valid, `PETSC_FALSE` otherwise

    1128:    Level: developer

    1130:    Notes:
    1131:    The `data` and `flag` variables are inlined, so they are not pointers.

    1133:    The length of the array accessed must be known, it is not available through this API.

    1135: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetReal()`,
    1136:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1137:           `PetscObjectCompose()`, `PetscObjectQuery()`
    1138: M*/
    1139: #define PetscObjectComposedDataGetIntstar(obj, id, data, flag) \
    1140:   ((PetscErrorCode)(((obj)->intstarcomposedstate ? (data = (obj)->intstarcomposeddata[id], flag = (PetscBool)((obj)->intstarcomposedstate[id] == (obj)->state)) : (flag = PETSC_FALSE)), PETSC_SUCCESS))

    1142: /*MC
    1143:    PetscObjectComposedDataSetReal - attach `PetscReal` data to a `PetscObject` that may be later accessed with `PetscObjectComposedDataGetReal()`

    1145:    Synopsis:
    1146:    #include "petsc/private/petscimpl.h"
    1147:    PetscErrorCode PetscObjectComposedDataSetReal(PetscObject obj, PetscInt id, PetscReal data)

    1149:    Not Collective

    1151:    Input Parameters:
    1152: +  obj - the object to which data is to be attached
    1153: .  id - the identifier for the data
    1154: -  data - the data to  be attached, a `PetscReal`

    1156:    Level: developer

    1158:    Note:
    1159:    The `data` identifier can be determined through a call to  `PetscObjectComposedDataRegister()`

    1161: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1162:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1163:           `PetscObjectCompose()`, `PetscObjectQuery()`
    1164: M*/
    1165: #define PetscObjectComposedDataSetReal(obj, id, data) \
    1166:   ((PetscErrorCode)((((obj)->real_idmax < PetscObjectComposedDataMax) && PetscObjectComposedDataIncreaseReal(obj)) || ((obj)->realcomposeddata[id] = data, (obj)->realcomposedstate[id] = (obj)->state, PETSC_SUCCESS)))

    1168: /*MC
    1169:    PetscObjectComposedDataGetReal - retrieve `PetscReal` data attached to a `PetscObject` set with `PetscObjectComposedDataSetReal()`

    1171:    Synopsis:
    1172:    #include "petsc/private/petscimpl.h"
    1173:    PetscErrorCode PetscObjectComposedDataGetReal(PetscObject obj, PetscInt id, PetscReal data, PetscBool flag)

    1175:    Not Collective

    1177:    Input Parameters:
    1178: +  obj - the object from which data is to be retrieved
    1179: -  id - the identifier for the data

    1181:    Output Parameters:
    1182: +  data - the data to be retrieved, a `PetscReal`
    1183: -  flag - `PETSC_TRUE` if the data item exists and is valid, `PETSC_FALSE` otherwise

    1185:    Level: developer

    1187:    Note:
    1188:    The `data` and `flag` variables are inlined, so they are not pointers.

    1190: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1191:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1192:           `PetscObjectCompose()`, `PetscObjectQuery()`
    1193: M*/
    1194: #define PetscObjectComposedDataGetReal(obj, id, data, flag) ((PetscErrorCode)(((obj)->realcomposedstate ? (data = (obj)->realcomposeddata[id], flag = (PetscBool)((obj)->realcomposedstate[id] == (obj)->state)) : (flag = PETSC_FALSE)), PETSC_SUCCESS))

    1196: /*MC
    1197:    PetscObjectComposedDataSetRealstar - attach `PetscReal` array data to a `PetscObject` that may be retrieved with `PetscObjectComposedDataGetRealstar()`

    1199:    Synopsis:
    1200:    #include "petsc/private/petscimpl.h"
    1201:    PetscErrorCode PetscObjectComposedDataSetRealstar(PetscObject obj, PetscInt id, PetscReal *data)

    1203:    Not Collective

    1205:    Input Parameters:
    1206: +  obj - the object to which data is to be attached
    1207: .  id - the identifier for the data
    1208: -  data - the data to  be attached

    1210:    Level: developer

    1212:    Notes:
    1213:    The `data` identifier can be determined through a call to `PetscObjectComposedDataRegister()`

    1215:    The length of the array accessed must be known, it is not available through this API.

    1217: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1218:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1219:           `PetscObjectCompose()`, `PetscObjectQuery()`, `PetscObjectComposedDataGetRealstar()`
    1220: M*/
    1221: #define PetscObjectComposedDataSetRealstar(obj, id, data) \
    1222:   ((PetscErrorCode)((((obj)->realstar_idmax < PetscObjectComposedDataMax) && PetscObjectComposedDataIncreaseRealstar(obj)) || ((obj)->realstarcomposeddata[id] = data, (obj)->realstarcomposedstate[id] = (obj)->state, PETSC_SUCCESS)))

    1224: /*MC
    1225:    PetscObjectComposedDataGetRealstar - retrieve `PetscReal` array data attached to a `PetscObject` with `PetscObjectComposedDataSetRealstar()`

    1227:    Synopsis:
    1228:    #include "petsc/private/petscimpl.h"
    1229:    PetscErrorCode PetscObjectComposedDataGetRealstar(PetscObject obj, PetscInt id, PetscReal *data, PetscBool flag)

    1231:    Not Collective

    1233:    Input Parameters:
    1234: +  obj - the object from which data is to be retrieved
    1235: -  id - the identifier for the data

    1237:    Output Parameters:
    1238: +  data - the data to be retrieved, a `PetscReal` array
    1239: -  flag - `PETSC_TRUE` if the data item exists and is valid, `PETSC_FALSE` otherwise

    1241:    Level: developer

    1243:    Notes:
    1244:    The `data` and `flag` variables are inlined, so they are not pointers.

    1246:    The length of the array accessed must be known, it is not available through this API.

    1248: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1249:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1250:           `PetscObjectCompose()`, `PetscObjectQuery()`, `PetscObjectComposedDataSetRealstar()`
    1251: M*/
    1252: #define PetscObjectComposedDataGetRealstar(obj, id, data, flag) \
    1253:   ((PetscErrorCode)(((obj)->realstarcomposedstate ? (data = (obj)->realstarcomposeddata[id], flag = (PetscBool)((obj)->realstarcomposedstate[id] == (obj)->state)) : (flag = PETSC_FALSE)), PETSC_SUCCESS))

    1255: /*MC
    1256:    PetscObjectComposedDataSetScalar - attach `PetscScalar` data to a `PetscObject` that may be later retrieved with `PetscObjectComposedDataGetScalar()`

    1258:    Synopsis:
    1259:    #include "petsc/private/petscimpl.h"
    1260:    PetscErrorCode PetscObjectComposedDataSetScalar(PetscObject obj, PetscInt id, PetscScalar data)

    1262:    Not Collective

    1264:    Input Parameters:
    1265: +  obj - the object to which data is to be attached
    1266: .  id - the identifier for the data
    1267: -  data - the data to  be attached, a `PetscScalar`

    1269:    Level: developer

    1271:    Note:
    1272:    The `data` identifier can be determined through a call to `PetscObjectComposedDataRegister()`

    1274: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1275:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1276:           `PetscObjectCompose()`, `PetscObjectQuery()`, `PetscObjectComposedDataSetRealstar()`, `PetscObjectComposedDataGetScalar()`
    1277: M*/
    1278: #if defined(PETSC_USE_COMPLEX)
    1279:   #define PetscObjectComposedDataSetScalar(obj, id, data) \
    1280:     ((PetscErrorCode)((((obj)->scalar_idmax < PetscObjectComposedDataMax) && PetscObjectComposedDataIncreaseScalar(obj)) || ((obj)->scalarcomposeddata[id] = data, (obj)->scalarcomposedstate[id] = (obj)->state, PETSC_SUCCESS)))
    1281: #else
    1282:   #define PetscObjectComposedDataSetScalar(obj, id, data) PetscObjectComposedDataSetReal(obj, id, data)
    1283: #endif
    1284: /*MC
    1285:    PetscObjectComposedDataGetScalar - retrieve `PetscScalar` data attached to a `PetscObject` that was set with `PetscObjectComposedDataSetScalar()`

    1287:    Synopsis:
    1288:    #include "petsc/private/petscimpl.h"
    1289:    PetscErrorCode PetscObjectComposedDataGetScalar(PetscObject obj, PetscInt id, PetscScalar data, PetscBool flag)

    1291:    Not Collective

    1293:    Input Parameters:
    1294: +  obj - the object from which data is to be retrieved
    1295: -  id - the identifier for the data

    1297:    Output Parameters:
    1298: +  data - the data to be retrieved, a `PetscScalar`
    1299: -  flag - `PETSC_TRUE` if the data item exists and is valid, `PETSC_FALSE` otherwise

    1301:    Level: developer

    1303:    Note:
    1304:    The `data` and `flag` variables are inlined, so they are not pointers.

    1306: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1307:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1308:           `PetscObjectCompose()`, `PetscObjectQuery()`, `PetscObjectComposedDataSetRealstar()`, `PetscObjectComposedDataSetScalar()`
    1309: M*/
    1310: #if defined(PETSC_USE_COMPLEX)
    1311:   #define PetscObjectComposedDataGetScalar(obj, id, data, flag) \
    1312:     ((PetscErrorCode)(((obj)->scalarcomposedstate ? (data = (obj)->scalarcomposeddata[id], flag = (PetscBool)((obj)->scalarcomposedstate[id] == (obj)->state)) : (flag = PETSC_FALSE)), PETSC_SUCCESS))
    1313: #else
    1314:   #define PetscObjectComposedDataGetScalar(obj, id, data, flag) PetscObjectComposedDataGetReal(obj, id, data, flag)
    1315: #endif

    1317: /*MC
    1318:    PetscObjectComposedDataSetScalarstar - attach `PetscScalar` array data to a `PetscObject` that may be later retrieved with `PetscObjectComposedDataSetScalarstar()`

    1320:    Synopsis:
    1321:    #include "petsc/private/petscimpl.h"
    1322:    PetscErrorCode PetscObjectComposedDataSetScalarstar(PetscObject obj, PetscInt id, PetscScalar *data)

    1324:    Not Collective

    1326:    Input Parameters:
    1327: +  obj - the object to which data is to be attached
    1328: .  id - the identifier for the data
    1329: -  data - the data to  be attached, a `PetscScalar` array

    1331:    Level: developer

    1333:    Notes:
    1334:    The `data` identifier can be determined through a call to `PetscObjectComposedDataRegister()`

    1336:    The length of the array accessed must be known, it is not available through this API.

    1338: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1339:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1340:           `PetscObjectCompose()`, `PetscObjectQuery()`, `PetscObjectComposedDataSetRealstar()`, `PetscObjectComposedDataGetScalarstar()`
    1341: M*/
    1342: #if defined(PETSC_USE_COMPLEX)
    1343:   #define PetscObjectComposedDataSetScalarstar(obj, id, data) \
    1344:     ((PetscErrorCode)((((obj)->scalarstar_idmax < PetscObjectComposedDataMax) && PetscObjectComposedDataIncreaseScalarstar(obj)) || ((obj)->scalarstarcomposeddata[id] = data, (obj)->scalarstarcomposedstate[id] = (obj)->state, PETSC_SUCCESS)))
    1345: #else
    1346:   #define PetscObjectComposedDataSetScalarstar(obj, id, data) PetscObjectComposedDataSetRealstar(obj, id, data)
    1347: #endif
    1348: /*MC
    1349:    PetscObjectComposedDataGetScalarstar - retrieve `PetscScalar` array data attached to a `PetscObject` that was set with `PetscObjectComposedDataSetScalarstar()`
    1350:    attached to an object

    1352:    Synopsis:
    1353:    #include "petsc/private/petscimpl.h"
    1354:    PetscErrorCode PetscObjectComposedDataGetScalarstar(PetscObject obj, PetscInt id, PetscScalar *data, PetscBool flag)

    1356:    Not Collective

    1358:    Input Parameters:
    1359: +  obj - the object from which data is to be retrieved
    1360: -  id - the identifier for the data

    1362:    Output Parameters:
    1363: +  data - the data to be retrieved, a `PetscScalar` array
    1364: -  flag - `PETSC_TRUE` if the data item exists and is valid, `PETSC_FALSE` otherwise

    1366:    Level: developer

    1368:    Notes:
    1369:    The `data` and `flag` variables are inlined, so they are not pointers.

    1371:    The length of the array accessed must be known, it is not available through this API.

    1373: .seealso: `PetscObjectComposedDataSetInt()`, `PetscObjectComposedDataSetReal()`, `PetscObjectComposedDataGetReal()`, `PetscObjectComposedDataSetIntstar()`,
    1374:           `PetscObjectComposedDataSetIntstar()`, `PetscObjectComposedDataGetInt()`, `PetscObject`,
    1375:           `PetscObjectCompose()`, `PetscObjectQuery()`, `PetscObjectComposedDataSetRealstar()`, `PetscObjectComposedDataSetScalarstar()`
    1376: M*/
    1377: #if defined(PETSC_USE_COMPLEX)
    1378:   #define PetscObjectComposedDataGetScalarstar(obj, id, data, flag) \
    1379:     ((PetscErrorCode)(((obj)->scalarstarcomposedstate ? (data = (obj)->scalarstarcomposeddata[id], flag = (PetscBool)((obj)->scalarstarcomposedstate[id] == (obj)->state)) : (flag = PETSC_FALSE)), PETSC_SUCCESS))
    1380: #else
    1381:   #define PetscObjectComposedDataGetScalarstar(obj, id, data, flag) PetscObjectComposedDataGetRealstar(obj, id, data, flag)
    1382: #endif

    1384: PETSC_EXTERN PetscMPIInt Petsc_Counter_keyval;
    1385: PETSC_EXTERN PetscMPIInt Petsc_InnerComm_keyval;
    1386: PETSC_EXTERN PetscMPIInt Petsc_OuterComm_keyval;
    1387: PETSC_EXTERN PetscMPIInt Petsc_Seq_keyval;
    1388: PETSC_EXTERN PetscMPIInt Petsc_ShmComm_keyval;
    1389: PETSC_EXTERN PetscMPIInt Petsc_CreationIdx_keyval;
    1390: PETSC_EXTERN PetscMPIInt Petsc_Garbage_HMap_keyval;

    1392: PETSC_EXTERN PetscMPIInt Petsc_SharedWD_keyval;
    1393: PETSC_EXTERN PetscMPIInt Petsc_SharedTmp_keyval;

    1395: struct PetscCommStash {
    1396:   struct PetscCommStash *next;
    1397:   MPI_Comm               comm;
    1398: };

    1400: /*
    1401:   PETSc communicators have this attribute, see
    1402:   PetscCommDuplicate(), PetscCommDestroy(), PetscCommGetNewTag(), PetscObjectGetName()
    1403: */
    1404: typedef struct {
    1405:   PetscMPIInt            tag;       /* next free tag value */
    1406:   PetscInt               refcount;  /* number of references, communicator can be freed when this reaches 0 */
    1407:   PetscInt               namecount; /* used to generate the next name, as in Vec_0, Mat_1, ... */
    1408:   PetscMPIInt           *iflags;    /* length of comm size, shared by all calls to PetscCommBuildTwoSided_Allreduce/RedScatter on this comm */
    1409:   struct PetscCommStash *comms;     /* communicators available for PETSc to pass off to other packages */
    1410: } PetscCommCounter;

    1412: typedef enum {
    1413:   STATE_BEGIN,
    1414:   STATE_PENDING,
    1415:   STATE_END
    1416: } SRState;

    1418: typedef enum {
    1419:   PETSC_SR_REDUCE_SUM = 0,
    1420:   PETSC_SR_REDUCE_MAX = 1,
    1421:   PETSC_SR_REDUCE_MIN = 2
    1422: } PetscSRReductionType;

    1424: typedef struct {
    1425:   MPI_Comm     comm;
    1426:   MPI_Request  request;
    1427:   PetscBool    mix;
    1428:   PetscBool    async;
    1429:   PetscScalar *lvalues;    /* this are the reduced values before call to MPI_Allreduce() */
    1430:   PetscScalar *gvalues;    /* values after call to MPI_Allreduce() */
    1431:   void       **invecs;     /* for debugging only, vector/memory used with each op */
    1432:   PetscInt    *reducetype; /* is particular value to be summed or maxed? */
    1433:   struct {
    1434:     PetscScalar v;
    1435:     PetscInt    i;
    1436:   }       *lvalues_mix, *gvalues_mix; /* used when mixing reduce operations */
    1437:   SRState  state;                     /* are we calling xxxBegin() or xxxEnd()? */
    1438:   PetscInt maxops;                    /* total amount of space we have for requests */
    1439:   PetscInt numopsbegin;               /* number of requests that have been queued in */
    1440:   PetscInt numopsend;                 /* number of requests that have been gotten by user */
    1441: } PetscSplitReduction;

    1443: PETSC_EXTERN PetscErrorCode PetscSplitReductionGet(MPI_Comm, PetscSplitReduction **);
    1444: PETSC_EXTERN PetscErrorCode PetscSplitReductionEnd(PetscSplitReduction *);
    1445: PETSC_EXTERN PetscErrorCode PetscSplitReductionExtend(PetscSplitReduction *);

    1447: #if defined(PETSC_HAVE_THREADSAFETY)
    1448:   #if defined(PETSC_HAVE_CONCURRENCYKIT)
    1449:     #if defined(__cplusplus)
    1450: /*  CK does not have extern "C" protection in their include files */
    1451: extern "C" {
    1452:     #endif
    1453:     #include <ck_spinlock.h>
    1454:     #if defined(__cplusplus)
    1455: }
    1456:     #endif
    1457: typedef ck_spinlock_t PetscSpinlock;

    1459: static inline PetscErrorCode PetscSpinlockCreate(PetscSpinlock *ck_spinlock)
    1460: {
    1461:   ck_spinlock_init(ck_spinlock);
    1462:   return PETSC_SUCCESS;
    1463: }
    1464: static inline PetscErrorCode PetscSpinlockLock(PetscSpinlock *ck_spinlock)
    1465: {
    1466:   ck_spinlock_lock(ck_spinlock);
    1467:   return PETSC_SUCCESS;
    1468: }
    1469: static inline PetscErrorCode PetscSpinlockUnlock(PetscSpinlock *ck_spinlock)
    1470: {
    1471:   ck_spinlock_unlock(ck_spinlock);
    1472:   return PETSC_SUCCESS;
    1473: }
    1474: static inline PetscErrorCode PetscSpinlockDestroy(PetscSpinlock *ck_spinlock)
    1475: {
    1476:   return PETSC_SUCCESS;
    1477: }
    1478:   #elif (defined(__cplusplus) && defined(PETSC_HAVE_CXX_ATOMIC)) || (!defined(__cplusplus) && defined(PETSC_HAVE_STDATOMIC_H))
    1479:     #if defined(__cplusplus)
    1480:       // See the example at https://en.cppreference.com/w/cpp/atomic/atomic_flag
    1481:       #include <atomic>
    1482:       #define petsc_atomic_flag                 std::atomic_flag
    1483:       #define petsc_atomic_flag_test_and_set(p) std::atomic_flag_test_and_set_explicit(p, std::memory_order_acquire)
    1484:       #define petsc_atomic_flag_clear(p)        std::atomic_flag_clear_explicit(p, std::memory_order_release)
    1485:     #else
    1486:       #include <stdatomic.h>
    1487:       #define petsc_atomic_flag                 atomic_flag
    1488:       #define petsc_atomic_flag_test_and_set(p) atomic_flag_test_and_set_explicit(p, memory_order_acquire)
    1489:       #define petsc_atomic_flag_clear(p)        atomic_flag_clear_explicit(p, memory_order_release)
    1490:     #endif

    1492: typedef petsc_atomic_flag PetscSpinlock;

    1494: static inline PetscErrorCode PetscSpinlockCreate(PetscSpinlock *spinlock)
    1495: {
    1496:   petsc_atomic_flag_clear(spinlock);
    1497:   return PETSC_SUCCESS;
    1498: }
    1499: static inline PetscErrorCode PetscSpinlockLock(PetscSpinlock *spinlock)
    1500: {
    1501:   do {
    1502:   } while (petsc_atomic_flag_test_and_set(spinlock));
    1503:   return PETSC_SUCCESS;
    1504: }
    1505: static inline PetscErrorCode PetscSpinlockUnlock(PetscSpinlock *spinlock)
    1506: {
    1507:   petsc_atomic_flag_clear(spinlock);
    1508:   return PETSC_SUCCESS;
    1509: }
    1510: static inline PetscErrorCode PetscSpinlockDestroy(PETSC_UNUSED PetscSpinlock *spinlock)
    1511: {
    1512:   return PETSC_SUCCESS;
    1513: }
    1514:     #undef petsc_atomic_flag_test_and_set
    1515:     #undef petsc_atomic_flag_clear
    1516:     #undef petsc_atomic_flag

    1518:   #elif defined(PETSC_HAVE_OPENMP)

    1520:     #include <omp.h>
    1521: typedef omp_lock_t PetscSpinlock;

    1523: static inline PetscErrorCode PetscSpinlockCreate(PetscSpinlock *omp_lock)
    1524: {
    1525:   omp_init_lock(omp_lock);
    1526:   return PETSC_SUCCESS;
    1527: }
    1528: static inline PetscErrorCode PetscSpinlockLock(PetscSpinlock *omp_lock)
    1529: {
    1530:   omp_set_lock(omp_lock);
    1531:   return PETSC_SUCCESS;
    1532: }
    1533: static inline PetscErrorCode PetscSpinlockUnlock(PetscSpinlock *omp_lock)
    1534: {
    1535:   omp_unset_lock(omp_lock);
    1536:   return PETSC_SUCCESS;
    1537: }
    1538: static inline PetscErrorCode PetscSpinlockDestroy(PetscSpinlock *omp_lock)
    1539: {
    1540:   omp_destroy_lock(omp_lock);
    1541:   return PETSC_SUCCESS;
    1542: }
    1543:   #else
    1544:     #if defined(__cplusplus)
    1545:       #error "Thread safety requires either --download-concurrencykit, std::atomic, or --with-openmp"
    1546:     #else
    1547:       #error "Thread safety requires either --download-concurrencykit, stdatomic.h, or --with-openmp"
    1548:     #endif
    1549:   #endif

    1551: #else
    1552: typedef int PetscSpinlock;
    1553:   #define PetscSpinlockCreate(a)  PETSC_SUCCESS
    1554:   #define PetscSpinlockLock(a)    PETSC_SUCCESS
    1555:   #define PetscSpinlockUnlock(a)  PETSC_SUCCESS
    1556:   #define PetscSpinlockDestroy(a) PETSC_SUCCESS
    1557: #endif

    1559: #if defined(PETSC_HAVE_THREADSAFETY)
    1560: PETSC_INTERN PetscSpinlock PetscViewerASCIISpinLockOpen;
    1561: PETSC_INTERN PetscSpinlock PetscViewerASCIISpinLockStdout;
    1562: PETSC_INTERN PetscSpinlock PetscViewerASCIISpinLockStderr;
    1563: PETSC_INTERN PetscSpinlock PetscCommSpinLock;
    1564: #endif

    1566: PETSC_EXTERN PetscLogEvent PETSC_Barrier;
    1567: PETSC_EXTERN PetscLogEvent PETSC_BuildTwoSided;
    1568: PETSC_EXTERN PetscLogEvent PETSC_BuildTwoSidedF;
    1569: PETSC_EXTERN PetscBool     use_gpu_aware_mpi;
    1570: PETSC_EXTERN PetscBool     PetscPrintFunctionList;

    1572: #if defined(PETSC_HAVE_ADIOS)
    1573: PETSC_EXTERN int64_t Petsc_adios_group;
    1574: #endif

    1576: #if defined(PETSC_HAVE_KOKKOS)
    1577: PETSC_INTERN PetscBool      PetscBeganKokkos;
    1578: PETSC_EXTERN PetscBool      PetscKokkosInitialized;
    1579: PETSC_INTERN PetscErrorCode PetscKokkosIsInitialized_Private(PetscBool *);
    1580: PETSC_INTERN PetscErrorCode PetscKokkosFinalize_Private(void);
    1581: #endif

    1583: #if defined(PETSC_HAVE_OPENMP)
    1584: PETSC_EXTERN PetscInt PetscNumOMPThreads;
    1585: #endif

    1587: struct _n_PetscObjectList {
    1588:   char            name[256];
    1589:   PetscBool       skipdereference; /* when the PetscObjectList is destroyed do not call PetscObjectDereference() on this object */
    1590:   PetscObject     obj;
    1591:   PetscObjectList next;
    1592: };