sys/objects/destroy.c

/*
     Provides utility routines for manulating any type of PETSc object.
*/
#include <petsc/private/petscimpl.h> /*I   "petscsys.h"    I*/
#include <petscviewer.h>

PetscErrorCode PetscComposedQuantitiesDestroy(PetscObject obj) {
  PetscInt i;

  PetscFunctionBegin;
  if (obj->intstar_idmax > 0) {
    for (i = 0; i < obj->intstar_idmax; i++) PetscCall(PetscFree(obj->intstarcomposeddata[i]));
    PetscCall(PetscFree2(obj->intstarcomposeddata, obj->intstarcomposedstate));
  }
  if (obj->realstar_idmax > 0) {
    for (i = 0; i < obj->realstar_idmax; i++) PetscCall(PetscFree(obj->realstarcomposeddata[i]));
    PetscCall(PetscFree2(obj->realstarcomposeddata, obj->realstarcomposedstate));
  }
  if (obj->scalarstar_idmax > 0) {
    for (i = 0; i < obj->scalarstar_idmax; i++) PetscCall(PetscFree(obj->scalarstarcomposeddata[i]));
    PetscCall(PetscFree2(obj->scalarstarcomposeddata, obj->scalarstarcomposedstate));
  }
  PetscCall(PetscFree2(obj->intcomposeddata, obj->intcomposedstate));
  PetscCall(PetscFree2(obj->realcomposeddata, obj->realcomposedstate));
  PetscCall(PetscFree2(obj->scalarcomposeddata, obj->scalarcomposedstate));
  PetscFunctionReturn(0);
}

/*@
   PetscObjectDestroy - Destroys any `PetscObject`, regardless of the type.

   Collective on obj

   Input Parameter:
.  obj - any PETSc object, for example a `Vec`, `Mat` or `KSP`.
         This must be cast with a (`PetscObject`*), for example,
         `PetscObjectDestroy`((`PetscObject`*)&mat);

   Level: beginner

.seealso: `PetscObject`
@*/
PetscErrorCode PetscObjectDestroy(PetscObject *obj) {
  PetscFunctionBegin;
  if (!obj || !*obj) PetscFunctionReturn(0);
  PetscValidHeader(*obj, 1);
  PetscCheck((*obj)->bops->destroy, PETSC_COMM_SELF, PETSC_ERR_PLIB, "This PETSc object of class %s does not have a generic destroy routine", (*obj)->class_name);
  PetscCall((*(*obj)->bops->destroy)(obj));
  PetscFunctionReturn(0);
}

/*@C
   PetscObjectView - Views any `PetscObject`, regardless of the type.

   Collective on obj

   Input Parameters:
+  obj - any PETSc object, for example a `Vec`, `Mat` or `KSP`.
         This must be cast with a (`PetscObject`), for example,
         `PetscObjectView`((`PetscObject`)mat,viewer);
-  viewer - any PETSc viewer

   Level: intermediate

.seealso: `PetscObject`, `PetscObjectViewFromOptions()`
@*/
PetscErrorCode PetscObjectView(PetscObject obj, PetscViewer viewer) {
  PetscFunctionBegin;
  PetscValidHeader(obj, 1);
  PetscCheck(obj->bops->view, PETSC_COMM_SELF, PETSC_ERR_SUP, "This PETSc object does not have a generic viewer routine");
  if (!viewer) PetscCall(PetscViewerASCIIGetStdout(obj->comm, &viewer));
  PetscValidHeaderSpecific(viewer, PETSC_VIEWER_CLASSID, 2);

  PetscCall((*obj->bops->view)(obj, viewer));
  PetscFunctionReturn(0);
}

/*@C
  PetscObjectViewFromOptions - Processes command line options to determine if/how a `PetscObject` is to be viewed.

  Collective on obj

  Input Parameters:
+ obj   - the object
. bobj  - optional other object that provides prefix (if NULL then the prefix in obj is used)
- optionname - option string that is used to activate viewing

  Level: intermediate

.seealso: `PetscObject`, `PetscObjectView()`
@*/
PetscErrorCode PetscObjectViewFromOptions(PetscObject obj, PetscObject bobj, const char optionname[]) {
  PetscViewer       viewer;
  PetscBool         flg;
  static PetscBool  incall = PETSC_FALSE;
  PetscViewerFormat format;
  const char       *prefix;

  PetscFunctionBegin;
  if (incall) PetscFunctionReturn(0);
  incall = PETSC_TRUE;
  prefix = bobj ? bobj->prefix : obj->prefix;
  PetscCall(PetscOptionsGetViewer(PetscObjectComm((PetscObject)obj), obj->options, prefix, optionname, &viewer, &format, &flg));
  if (flg) {
    PetscCall(PetscViewerPushFormat(viewer, format));
    PetscCall(PetscObjectView(obj, viewer));
    PetscCall(PetscViewerFlush(viewer));
    PetscCall(PetscViewerPopFormat(viewer));
    PetscCall(PetscViewerDestroy(&viewer));
  }
  incall = PETSC_FALSE;
  PetscFunctionReturn(0);
}

/*@C
   PetscObjectTypeCompare - Determines whether a PETSc object is of a particular type.

   Not Collective

   Input Parameters:
+  obj - any PETSc object, for example a `Vec`, `Mat or `KSP`.
         This must be cast with a (`PetscObject`), for example,
         `PetscObjectTypeCompare`((`PetscObject`)mat);
-  type_name - string containing a type name

   Output Parameter:
.  same - `PETSC_TRUE` if they are the same, else `PETSC_FALSE`

   Level: intermediate

.seealso: `PetscObject`, `VecGetType()`, `KSPGetType()`, `PCGetType()`, `SNESGetType()`, `PetscObjectBaseTypeCompare()`, `PetscObjectTypeCompareAny()`, `PetscObjectBaseTypeCompareAny()`
@*/
PetscErrorCode PetscObjectTypeCompare(PetscObject obj, const char type_name[], PetscBool *same) {
  PetscFunctionBegin;
  PetscValidBoolPointer(same, 3);
  if (!obj) *same = PETSC_FALSE;
  else if (!type_name && !obj->type_name) *same = PETSC_TRUE;
  else if (!type_name || !obj->type_name) *same = PETSC_FALSE;
  else {
    PetscValidHeader(obj, 1);
    PetscValidCharPointer(type_name, 2);
    PetscCall(PetscStrcmp((char *)(obj->type_name), type_name, same));
  }
  PetscFunctionReturn(0);
}

/*@C
   PetscObjectBaseTypeCompare - Determines whether a `PetscObject` is of a given base type. For example the base type of `MATSEQAIJPERM` is `MATSEQAIJ`

   Not Collective

   Input Parameters:
+  mat - the matrix
-  type_name - string containing a type name

   Output Parameter:
.  same - `PETSC_TRUE` if it is of the same base type

   Level: intermediate

.seealso: `PetscObject`, `PetscObjectTypeCompare()`, `PetscObjectTypeCompareAny()`, `PetscObjectBaseTypeCompareAny()`
@*/
PetscErrorCode PetscObjectBaseTypeCompare(PetscObject obj, const char type_name[], PetscBool *same) {
  PetscFunctionBegin;
  PetscValidBoolPointer(same, 3);
  if (!obj) *same = PETSC_FALSE;
  else if (!type_name && !obj->type_name) *same = PETSC_TRUE;
  else if (!type_name || !obj->type_name) *same = PETSC_FALSE;
  else {
    PetscValidHeader(obj, 1);
    PetscValidCharPointer(type_name, 2);
    PetscCall(PetscStrbeginswith((char *)(obj->type_name), type_name, same));
  }
  PetscFunctionReturn(0);
}

/*@C
   PetscObjectTypeCompareAny - Determines whether a PETSc object is of any of a list of types.

   Not Collective

   Input Parameters:
+  obj - any PETSc object, for example a `Vec`, `Mat` or `KSP`.
         This must be cast with a (`PetscObjec`t), for example, `PetscObjectTypeCompareAny`((`PetscObject`)mat,...);
-  type_name - array of strings containing type names, pass the empty string "" to terminate the list

   Output Parameter:
.  match - `PETSC_TRUE` if the type of obj matches any in the list, else `PETSC_FALSE`

   Level: intermediate

.seealso: `VecGetType()`, `KSPGetType()`, `PCGetType()`, `SNESGetType()`, `PetscObjectTypeCompare()`, `PetscObjectBaseTypeCompare()`
@*/
PetscErrorCode PetscObjectTypeCompareAny(PetscObject obj, PetscBool *match, const char type_name[], ...) {
  va_list Argp;

  PetscFunctionBegin;
  PetscValidBoolPointer(match, 2);
  *match = PETSC_FALSE;
  if (!obj) PetscFunctionReturn(0);
  va_start(Argp, type_name);
  while (type_name && type_name[0]) {
    PetscBool found;
    PetscCall(PetscObjectTypeCompare(obj, type_name, &found));
    if (found) {
      *match = PETSC_TRUE;
      break;
    }
    type_name = va_arg(Argp, const char *);
  }
  va_end(Argp);
  PetscFunctionReturn(0);
}

/*@C
   PetscObjectBaseTypeCompareAny - Determines whether a PETSc object has the base type of any of a list of types.

   Not Collective

   Input Parameters:
+  obj - any PETSc object, for example a `Vec`, `Mat` or `KSP`.
         This must be cast with a (`PetscObject`), for example, `PetscObjectBaseTypeCompareAny`((`PetscObject`)mat,...);
-  type_name - array of strings containing type names, pass the empty string "" to terminate the list

   Output Parameter:
.  match - `PETSC_TRUE` if the type of obj matches any in the list, else `PETSC_FALSE`

   Level: intermediate

.seealso: `VecGetType()`, `KSPGetType()`, `PCGetType()`, `SNESGetType()`, `PetscObjectTypeCompare()`, `PetscObjectBaseTypeCompare()`, `PetscObjectTypeCompareAny()`
@*/
PetscErrorCode PetscObjectBaseTypeCompareAny(PetscObject obj, PetscBool *match, const char type_name[], ...) {
  va_list Argp;

  PetscFunctionBegin;
  PetscValidBoolPointer(match, 2);
  *match = PETSC_FALSE;
  va_start(Argp, type_name);
  while (type_name && type_name[0]) {
    PetscBool found;
    PetscCall(PetscObjectBaseTypeCompare(obj, type_name, &found));
    if (found) {
      *match = PETSC_TRUE;
      break;
    }
    type_name = va_arg(Argp, const char *);
  }
  va_end(Argp);
  PetscFunctionReturn(0);
}

#define MAXREGDESOBJS 256
static int         PetscObjectRegisterDestroy_Count = 0;
static PetscObject PetscObjectRegisterDestroy_Objects[MAXREGDESOBJS];

/*@C
   PetscObjectRegisterDestroy - Registers a PETSc object to be destroyed when
     `PetscFinalize()` is called.

   Logically Collective on obj

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

   Level: developer

   Note:
      This is used by, for example, PETSC_VIEWER_XXX_() routines to free the viewer
    when PETSc ends.

.seealso: `PetscObjectRegisterDestroyAll()`
@*/
PetscErrorCode PetscObjectRegisterDestroy(PetscObject obj) {
  PetscFunctionBegin;
  PetscValidHeader(obj, 1);
  PetscCheck(PetscObjectRegisterDestroy_Count < MAXREGDESOBJS, PETSC_COMM_SELF, PETSC_ERR_PLIB, "No more room in array, limit %d \n recompile %s with larger value for " PetscStringize_(MAXREGDESOBJS), MAXREGDESOBJS, __FILE__);
  PetscObjectRegisterDestroy_Objects[PetscObjectRegisterDestroy_Count++] = obj;
  PetscFunctionReturn(0);
}

/*@C
   PetscObjectRegisterDestroyAll - Frees all the PETSc objects that have been registered
     with `PetscObjectRegisterDestroy()`. Called by `PetscFinalize()`

   Logically Collective on the individual `PetscObject`s that are being processed

   Level: developer

.seealso: `PetscObjectRegisterDestroy()`
@*/
PetscErrorCode PetscObjectRegisterDestroyAll(void) {
  PetscFunctionBegin;
  for (PetscInt i = 0; i < PetscObjectRegisterDestroy_Count; i++) PetscCall(PetscObjectDestroy(&PetscObjectRegisterDestroy_Objects[i]));
  PetscObjectRegisterDestroy_Count = 0;
  PetscFunctionReturn(0);
}

#define MAXREGFIN 256
static int PetscRegisterFinalize_Count = 0;
static PetscErrorCode (*PetscRegisterFinalize_Functions[MAXREGFIN])(void);

/*@C
   PetscRegisterFinalize - Registers a function that is to be called in `PetscFinalize()`

   Not Collective

   Input Parameter:
.  PetscErrorCode (*fun)(void) -

   Level: developer

   Note:
      This is used by, for example, `DMInitializePackage()` to have `DMFinalizePackage()` called

.seealso: `PetscRegisterFinalizeAll()`
@*/
PetscErrorCode PetscRegisterFinalize(PetscErrorCode (*f)(void)) {
  PetscFunctionBegin;
  for (PetscInt i = 0; i < PetscRegisterFinalize_Count; i++) {
    if (f == PetscRegisterFinalize_Functions[i]) PetscFunctionReturn(0);
  }
  PetscCheck(PetscRegisterFinalize_Count < MAXREGFIN, PETSC_COMM_SELF, PETSC_ERR_PLIB, "No more room in array, limit %d \n recompile %s with larger value for " PetscStringize_(MAXREGFIN), MAXREGFIN, __FILE__);
  PetscRegisterFinalize_Functions[PetscRegisterFinalize_Count++] = f;
  PetscFunctionReturn(0);
}

/*@C
   PetscRegisterFinalizeAll - Runs all the finalize functions set with `PetscRegisterFinalize()`

   Not Collective unless registered functions are collective

   Level: developer

.seealso: `PetscRegisterFinalize()`
@*/
PetscErrorCode PetscRegisterFinalizeAll(void) {
  PetscFunctionBegin;
  for (PetscInt i = 0; i < PetscRegisterFinalize_Count; i++) PetscCall((*PetscRegisterFinalize_Functions[i])());
  PetscRegisterFinalize_Count = 0;
  PetscFunctionReturn(0);
}