Actual source code: reg.c
1: /*
2: Provides a general mechanism to allow one to register new routines in
3: dynamic libraries for many of the PETSc objects (including, e.g., KSP and PC).
4: */
5: #include <petsc/private/petscimpl.h>
6: #include <petscviewer.h>
8: #include <petsc/private/hashmap.h>
9: /*
10: This is the default list used by PETSc with the PetscDLLibrary register routines
11: */
12: PetscDLLibrary PetscDLLibrariesLoaded = NULL;
14: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES)
16: static PetscErrorCode PetscLoadDynamicLibrary(const char *name, PetscBool *found)
17: {
18: char libs[PETSC_MAX_PATH_LEN], dlib[PETSC_MAX_PATH_LEN];
20: PetscFunctionBegin;
21: PetscCall(PetscStrncpy(libs, "${PETSC_LIB_DIR}/libpetsc", sizeof(libs)));
22: PetscCall(PetscStrlcat(libs, name, sizeof(libs)));
23: #if defined(PETSC_LIB_NAME_SUFFIX)
24: PetscCall(PetscStrlcat(libs, PETSC_LIB_NAME_SUFFIX, sizeof(libs)));
25: #endif
26: PetscCall(PetscDLLibraryRetrieve(PETSC_COMM_WORLD, libs, dlib, 1024, found));
27: if (*found) {
28: PetscCall(PetscDLLibraryAppend(PETSC_COMM_WORLD, &PetscDLLibrariesLoaded, dlib));
29: } else {
30: PetscCall(PetscStrncpy(libs, "${PETSC_DIR}/${PETSC_ARCH}/lib/libpetsc", sizeof(libs)));
31: PetscCall(PetscStrlcat(libs, name, sizeof(libs)));
32: #if defined(PETSC_LIB_NAME_SUFFIX)
33: PetscCall(PetscStrlcat(libs, PETSC_LIB_NAME_SUFFIX, sizeof(libs)));
34: #endif
35: PetscCall(PetscDLLibraryRetrieve(PETSC_COMM_WORLD, libs, dlib, 1024, found));
36: if (*found) PetscCall(PetscDLLibraryAppend(PETSC_COMM_WORLD, &PetscDLLibrariesLoaded, dlib));
37: }
38: PetscFunctionReturn(PETSC_SUCCESS);
39: }
40: #endif
42: #if defined(PETSC_USE_SINGLE_LIBRARY) && !(defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES))
43: PETSC_EXTERN PetscErrorCode AOInitializePackage(void);
44: PETSC_EXTERN PetscErrorCode PetscSFInitializePackage(void);
45: #if !defined(PETSC_USE_COMPLEX)
46: PETSC_EXTERN PetscErrorCode CharacteristicInitializePackage(void);
47: #endif
48: PETSC_EXTERN PetscErrorCode ISInitializePackage(void);
49: PETSC_EXTERN PetscErrorCode VecInitializePackage(void);
50: PETSC_EXTERN PetscErrorCode MatInitializePackage(void);
51: PETSC_EXTERN PetscErrorCode DMInitializePackage(void);
52: PETSC_EXTERN PetscErrorCode PCInitializePackage(void);
53: PETSC_EXTERN PetscErrorCode KSPInitializePackage(void);
54: PETSC_EXTERN PetscErrorCode SNESInitializePackage(void);
55: PETSC_EXTERN PetscErrorCode TSInitializePackage(void);
56: PETSC_EXTERN PetscErrorCode TaoInitializePackage(void);
57: #endif
59: /*
60: PetscInitialize_DynamicLibraries - Adds the default dynamic link libraries to the
61: search path.
62: */
63: PETSC_INTERN PetscErrorCode PetscInitialize_DynamicLibraries(void)
64: {
65: char *libname[32];
66: PetscInt nmax, i;
67: PetscBool preload = PETSC_FALSE;
68: #if defined(PETSC_HAVE_ELEMENTAL)
69: PetscBool PetscInitialized = PetscInitializeCalled;
70: #endif
72: PetscFunctionBegin;
73: #if defined(PETSC_HAVE_THREADSAFETY)
74: /* These must be all initialized here because it is not safe for individual threads to call these initialize routines */
75: preload = PETSC_TRUE;
76: #endif
78: nmax = 32;
79: PetscCall(PetscOptionsGetStringArray(NULL, NULL, "-dll_prepend", libname, &nmax, NULL));
80: for (i = 0; i < nmax; i++) {
81: PetscCall(PetscDLLibraryPrepend(PETSC_COMM_WORLD, &PetscDLLibrariesLoaded, libname[i]));
82: PetscCall(PetscFree(libname[i]));
83: }
85: PetscCall(PetscOptionsGetBool(NULL, NULL, "-library_preload", &preload, NULL));
86: if (!preload) {
87: PetscCall(PetscSysInitializePackage());
88: } else {
89: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES)
90: PetscBool found;
91: #if defined(PETSC_USE_SINGLE_LIBRARY)
92: PetscCall(PetscLoadDynamicLibrary("", &found));
93: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc dynamic library. You cannot move the dynamic libraries!");
94: #else
95: PetscCall(PetscLoadDynamicLibrary("sys", &found));
96: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc Sys dynamic library. You cannot move the dynamic libraries!");
97: PetscCall(PetscLoadDynamicLibrary("vec", &found));
98: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc Vec dynamic library. You cannot move the dynamic libraries!");
99: PetscCall(PetscLoadDynamicLibrary("mat", &found));
100: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc Mat dynamic library. You cannot move the dynamic libraries!");
101: PetscCall(PetscLoadDynamicLibrary("dm", &found));
102: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc DM dynamic library. You cannot move the dynamic libraries!");
103: PetscCall(PetscLoadDynamicLibrary("ksp", &found));
104: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc KSP dynamic library. You cannot move the dynamic libraries!");
105: PetscCall(PetscLoadDynamicLibrary("snes", &found));
106: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc SNES dynamic library. You cannot move the dynamic libraries!");
107: PetscCall(PetscLoadDynamicLibrary("ts", &found));
108: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc TS dynamic library. You cannot move the dynamic libraries!");
109: PetscCall(PetscLoadDynamicLibrary("tao", &found));
110: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate Tao dynamic library. You cannot move the dynamic libraries!");
111: #endif
112: #else /* defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES) */
113: #if defined(PETSC_USE_SINGLE_LIBRARY)
114: PetscCall(AOInitializePackage());
115: PetscCall(PetscSFInitializePackage());
116: #if !defined(PETSC_USE_COMPLEX)
117: PetscCall(CharacteristicInitializePackage());
118: #endif
119: PetscCall(ISInitializePackage());
120: PetscCall(VecInitializePackage());
121: PetscCall(MatInitializePackage());
122: PetscCall(DMInitializePackage());
123: PetscCall(PCInitializePackage());
124: PetscCall(KSPInitializePackage());
125: PetscCall(SNESInitializePackage());
126: PetscCall(TSInitializePackage());
127: PetscCall(TaoInitializePackage());
128: #else
129: SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "Cannot use -library_preload with multiple static PETSc libraries");
130: #endif
131: #endif /* defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES) */
132: }
134: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES) && defined(PETSC_HAVE_BAMG)
135: {
136: PetscBool found;
137: PetscCall(PetscLoadDynamicLibrary("bamg", &found));
138: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PETSc BAMG dynamic library. You cannot move the dynamic libraries!");
139: }
140: #endif
141: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES) && defined(PETSC_USE_SHARED_LIBRARIES) && defined(PETSC_HAVE_PFLARE)
142: {
143: PetscBool found;
144: PetscCall(PetscLoadDynamicLibrary("pflare", &found));
145: PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate PFLARE dynamic library. You cannot move the dynamic libraries!");
146: }
147: #endif
149: nmax = 32;
150: PetscCall(PetscOptionsGetStringArray(NULL, NULL, "-dll_append", libname, &nmax, NULL));
151: for (i = 0; i < nmax; i++) {
152: PetscCall(PetscDLLibraryAppend(PETSC_COMM_WORLD, &PetscDLLibrariesLoaded, libname[i]));
153: PetscCall(PetscFree(libname[i]));
154: }
156: #if defined(PETSC_HAVE_ELEMENTAL)
157: /* in Fortran, PetscInitializeCalled is set to PETSC_TRUE before PetscInitialize_DynamicLibraries() */
158: /* in C, it is not the case, but the value is forced to PETSC_TRUE so that PetscRegisterFinalize() is called */
159: PetscInitializeCalled = PETSC_TRUE;
160: PetscCall(PetscElementalInitializePackage());
161: PetscInitializeCalled = PetscInitialized;
162: #endif
163: PetscFunctionReturn(PETSC_SUCCESS);
164: }
166: /*
167: PetscFinalize_DynamicLibraries - Closes the opened dynamic libraries.
168: */
169: PETSC_INTERN PetscErrorCode PetscFinalize_DynamicLibraries(void)
170: {
171: PetscBool flg = PETSC_FALSE;
173: PetscFunctionBegin;
174: PetscCall(PetscOptionsGetBool(NULL, NULL, "-dll_view", &flg, NULL));
175: if (flg) PetscCall(PetscDLLibraryPrintPath(PetscDLLibrariesLoaded));
176: PetscCall(PetscDLLibraryClose(PetscDLLibrariesLoaded));
177: PetscDLLibrariesLoaded = NULL;
178: PetscFunctionReturn(PETSC_SUCCESS);
179: }
181: PETSC_HASH_MAP(HMapFunc, const char *, PetscErrorCodeFn *, kh_str_hash_func, kh_str_hash_equal, NULL)
183: struct _n_PetscFunctionList {
184: PetscHMapFunc map;
185: };
187: /* Keep a linked list of PetscFunctionLists so that we can destroy all the left-over ones. */
188: typedef struct n_PetscFunctionListDLAll *PetscFunctionListDLAll;
189: struct n_PetscFunctionListDLAll {
190: PetscFunctionList data;
191: PetscFunctionListDLAll next;
192: };
194: static PetscFunctionListDLAll dlallhead = NULL;
196: static PetscErrorCode PetscFunctionListDLAllPush_Private(PetscFunctionList fl)
197: {
198: PetscFunctionBegin;
199: if (PetscDefined(USE_DEBUG) && !PetscDefined(HAVE_THREADSAFETY)) {
200: PetscFunctionListDLAll head;
202: PetscCall(PetscNew(&head));
203: head->data = fl;
204: head->next = dlallhead;
205: dlallhead = head;
206: }
207: PetscFunctionReturn(PETSC_SUCCESS);
208: }
210: static PetscErrorCode PetscFunctionListDLAllPop_Private(PetscFunctionList fl)
211: {
212: PetscFunctionBegin;
213: if (PetscDefined(USE_DEBUG) && !PetscDefined(HAVE_THREADSAFETY)) {
214: PetscFunctionListDLAll current = dlallhead, prev = NULL;
216: /* Remove this entry from the main DL list (if it is in it) */
217: while (current) {
218: const PetscFunctionListDLAll next = current->next;
220: if (current->data == fl) {
221: if (prev) {
222: // somewhere in the middle (or end) of the list
223: prev->next = next;
224: } else {
225: // prev = NULL implies current = dlallhead, so front of list
226: dlallhead = next;
227: }
228: PetscCall(PetscFree(current));
229: break;
230: }
231: prev = current;
232: current = next;
233: }
234: }
235: PetscFunctionReturn(PETSC_SUCCESS);
236: }
238: static PetscErrorCode PetscHMapFuncInsert_Private(PetscHMapFunc map, const char name[], PetscErrorCodeFn *fnc)
239: {
240: PetscHashIter it;
241: PetscBool found;
243: PetscFunctionBegin;
244: PetscAssertPointer(name, 2);
246: PetscCall(PetscHMapFuncFind(map, name, &it, &found));
247: if (fnc) {
248: if (found) {
249: PetscCall(PetscHMapFuncIterSet(map, it, fnc));
250: } else {
251: char *tmp_name;
253: PetscCall(PetscStrallocpy(name, &tmp_name));
254: PetscCall(PetscHMapFuncSet(map, tmp_name, fnc));
255: }
256: } else if (found) {
257: const char *tmp_name;
259: PetscHashIterGetKey(map, it, tmp_name);
260: PetscCall(PetscFree(tmp_name));
261: PetscCall(PetscHMapFuncIterDel(map, it));
262: }
263: PetscFunctionReturn(PETSC_SUCCESS);
264: }
266: static PetscErrorCode PetscFunctionListCreate_Private(PetscInt size, PetscFunctionList *fl)
267: {
268: PetscFunctionBegin;
269: if (*fl) PetscFunctionReturn(PETSC_SUCCESS);
270: PetscCall(PetscNew(fl));
271: PetscCall(PetscHMapFuncCreateWithSize(size, &(*fl)->map));
272: PetscCall(PetscFunctionListDLAllPush_Private(*fl));
273: PetscFunctionReturn(PETSC_SUCCESS);
274: }
276: PetscErrorCode PetscFunctionListAdd_Private(PetscFunctionList *fl, const char name[], PetscErrorCodeFn *fptr)
277: {
278: PetscFunctionBegin;
279: PetscAssertPointer(fl, 1);
280: if (name) PetscAssertPointer(name, 2);
282: if (!fptr && !*fl) PetscFunctionReturn(PETSC_SUCCESS);
283: PetscCall(PetscFunctionListCreate_Private(0, fl));
284: PetscCall(PetscHMapFuncInsert_Private((*fl)->map, name, fptr));
285: PetscFunctionReturn(PETSC_SUCCESS);
286: }
288: /*@C
289: PetscFunctionListDestroy - Destroys a list of registered routines.
291: Input Parameter:
292: . fl - pointer to list
294: Level: developer
296: .seealso: `PetscFunctionListAdd()`, `PetscFunctionList`, `PetscFunctionListClear()`
297: @*/
298: PetscErrorCode PetscFunctionListDestroy(PetscFunctionList *fl)
299: {
300: PetscFunctionBegin;
301: if (!*fl) PetscFunctionReturn(PETSC_SUCCESS);
302: PetscCall(PetscFunctionListDLAllPop_Private(*fl));
303: /* free this list */
304: PetscCall(PetscFunctionListClear(*fl));
305: PetscCall(PetscHMapFuncDestroy(&(*fl)->map));
306: PetscCall(PetscFree(*fl));
307: PetscFunctionReturn(PETSC_SUCCESS);
308: }
310: #define PetscHMapFuncForEach(__func_list__, __key_name__, __val_name__, ...) \
311: do { \
312: const PetscHMapFunc phmfi_map_ = (__func_list__)->map; \
313: PetscHashIter phmfi_iter_; \
314: \
315: PetscHashIterBegin(phmfi_map_, phmfi_iter_); \
316: while (!PetscHashIterAtEnd(phmfi_map_, phmfi_iter_)) { \
317: const char *PETSC_UNUSED __key_name__; \
318: PetscErrorCodeFn *PETSC_UNUSED __val_name__; \
319: \
320: PetscHashIterGetKey(phmfi_map_, phmfi_iter_, __key_name__); \
321: PetscHashIterGetVal(phmfi_map_, phmfi_iter_, __val_name__); \
322: { \
323: __VA_ARGS__; \
324: } \
325: PetscHashIterNext(phmfi_map_, phmfi_iter_); \
326: } /* end while */ \
327: } while (0)
329: /*@C
330: PetscFunctionListClear - Clear a `PetscFunctionList`
332: Not Collective
334: Input Parameter:
335: . fl - The `PetscFunctionList` to clear
337: Level: developer
339: Notes:
340: This clears the contents of `fl` but does not deallocate the entries themselves.
342: .seealso: `PetscFunctionList`, `PetscFunctionListDestroy()`, `PetscFunctionListAdd()`
343: @*/
344: PetscErrorCode PetscFunctionListClear(PetscFunctionList fl)
345: {
346: PetscFunctionBegin;
347: if (fl) {
348: PetscHMapFuncForEach(fl, name, func, PetscCall(PetscFree(name)));
349: PetscCall(PetscHMapFuncClear(fl->map));
350: }
351: PetscFunctionReturn(PETSC_SUCCESS);
352: }
354: /*
355: Print registered PetscFunctionLists
356: */
357: PetscErrorCode PetscFunctionListPrintAll(void)
358: {
359: PetscFunctionListDLAll current = dlallhead;
361: PetscFunctionBegin;
362: if (current) PetscCall(PetscPrintf(PETSC_COMM_SELF, "[%d] Registered PetscFunctionLists\n", PetscGlobalRank));
363: while (current) {
364: PetscCall(PetscFunctionListPrintNonEmpty(current->data));
365: current = current->next;
366: }
367: PetscFunctionReturn(PETSC_SUCCESS);
368: }
370: /*@C
371: PetscFunctionListPrintNonEmpty - Print composed names for non `NULL` function pointers
373: Logically Collective, No Fortran Support
375: Input Parameter:
376: . fl - the function list
378: Level: developer
380: .seealso: `PetscFunctionListAdd()`, `PetscFunctionList`, `PetscObjectQueryFunction()`
381: @*/
382: PetscErrorCode PetscFunctionListPrintNonEmpty(PetscFunctionList fl)
383: {
384: PetscFunctionBegin;
385: if (fl) {
386: // clang-format off
387: PetscHMapFuncForEach(
388: fl,
389: name, func,
390: PetscCall(PetscFPrintf(PETSC_COMM_SELF, PETSC_STDOUT, "[%d] function name: %s\n", PetscGlobalRank, name));
391: );
392: // clang-format on
393: }
394: PetscFunctionReturn(PETSC_SUCCESS);
395: }
397: PetscErrorCode PetscFunctionListFind_Private(PetscFunctionList fl, const char name[], PetscErrorCodeFn **fptr)
398: {
399: PetscFunctionBegin;
400: PetscAssertPointer(name, 2);
401: PetscAssertPointer(fptr, 3);
402: *fptr = NULL;
403: if (fl) PetscCall(PetscHMapFuncGet(fl->map, name, fptr));
404: PetscFunctionReturn(PETSC_SUCCESS);
405: }
407: /*@C
408: PetscFunctionListView - prints out contents of a `PetscFunctionList`
410: Collective
412: Input Parameters:
413: + list - the list of functions
414: - viewer - the `PetscViewer` used to view the `PetscFunctionList`
416: Level: developer
418: .seealso: `PetscFunctionListAdd()`, `PetscFunctionListPrintTypes()`, `PetscFunctionList`
419: @*/
420: PetscErrorCode PetscFunctionListView(PetscFunctionList list, PetscViewer viewer)
421: {
422: PetscBool isascii;
424: PetscFunctionBegin;
425: PetscAssertPointer(list, 1);
426: if (!viewer) PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_SELF, &viewer));
429: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &isascii));
430: PetscCheck(isascii, PETSC_COMM_SELF, PETSC_ERR_SUP, "Only ASCII viewer supported");
431: {
432: PetscInt size;
434: PetscCall(PetscHMapFuncGetSize(list->map, &size));
435: PetscCall(PetscViewerASCIIPrintf(viewer, "PetscFunctionList Object:\n"));
436: PetscCall(PetscViewerASCIIPushTab(viewer));
437: PetscCall(PetscViewerASCIIPrintf(viewer, "size: %" PetscInt_FMT "\n", size));
438: if (size) {
439: PetscInt count = 0;
441: PetscCall(PetscViewerASCIIPrintf(viewer, "functions:\n"));
442: PetscCall(PetscViewerASCIIPushTab(viewer));
443: PetscHMapFuncForEach(list, name, func, PetscCall(PetscViewerASCIIPrintf(viewer, "%" PetscInt_FMT ": %s\n", ++count, name)));
444: PetscCall(PetscViewerASCIIPopTab(viewer));
445: }
446: PetscCall(PetscViewerASCIIPopTab(viewer));
447: }
448: PetscFunctionReturn(PETSC_SUCCESS);
449: }
451: /*@C
452: PetscFunctionListGet - Gets an array the contains the entries in `PetscFunctionList`, this is used
453: by help etc.
455: Not Collective, No Fortran Support
457: Input Parameter:
458: . list - list of types
460: Output Parameters:
461: + array - array of names
462: - n - length of `array`
464: Level: developer
466: Note:
467: This allocates the array so that must be freed with `PetscFree()`. BUT the individual entries should not be freed.
469: .seealso: `PetscFunctionListAdd()`, `PetscFunctionList`
470: @*/
471: PetscErrorCode PetscFunctionListGet(PetscFunctionList list, const char ***array, int *n)
472: {
473: PetscInt size = 0;
475: PetscFunctionBegin;
476: PetscAssertPointer(array, 2);
477: *array = NULL;
478: if (list) {
479: const PetscHMapFunc map = list->map;
480: PetscInt off = 0;
482: PetscCall(PetscHMapFuncGetSize(map, &size));
483: PetscCall(PetscMalloc1(size, (char ***)array));
484: PetscCall(PetscHMapFuncGetKeys(map, &off, *array));
485: }
486: PetscCall(PetscCIntCast(size, n));
487: PetscFunctionReturn(PETSC_SUCCESS);
488: }
490: /*@C
491: PetscFunctionListPrintTypes - Prints the methods available in a list of functions
493: Collective, No Fortran Support
495: Input Parameters:
496: + comm - the communicator (usually `MPI_COMM_WORLD`)
497: . fd - file to print to, usually `stdout`
498: . prefix - prefix to prepend to name (optional)
499: . name - option string (for example, `-ksp_type`)
500: . text - short description of the object (for example, "Krylov solvers")
501: . man - name of manual page that discusses the object (for example, `KSPCreate`)
502: . list - list of types
503: . def - default (current) value
504: - newv - new value
506: Level: developer
508: .seealso: `PetscFunctionListAdd()`, `PetscFunctionList`
509: @*/
510: PetscErrorCode PetscFunctionListPrintTypes(MPI_Comm comm, FILE *fd, const char prefix[], const char name[], const char text[], const char man[], PetscFunctionList list, const char def[], const char newv[])
511: {
512: char p[64];
514: PetscFunctionBegin;
515: (void)fd;
516: PetscCall(PetscStrncpy(p, "-", sizeof(p)));
517: if (prefix) PetscCall(PetscStrlcat(p, prefix, sizeof(p)));
518: PetscCall((*PetscHelpPrintf)(comm, " %s%s <now %s : formerly %s>: %s (one of)", p, name + 1, newv, def, text));
520: if (list) PetscHMapFuncForEach(list, name, func, PetscCall((*PetscHelpPrintf)(comm, " %s", name)));
521: PetscCall((*PetscHelpPrintf)(comm, " (%s)\n", man));
522: PetscFunctionReturn(PETSC_SUCCESS);
523: }
525: /*@C
526: PetscFunctionListDuplicate - Creates a new list from a given function list `PetscFunctionList`.
528: Input Parameter:
529: . fl - pointer to list
531: Output Parameter:
532: . nl - the new list (should point to `NULL` to start, otherwise appends)
534: Level: developer
536: .seealso: `PetscFunctionList`, `PetscFunctionListAdd()`, `PetscFlistDestroy()`
537: @*/
538: PetscErrorCode PetscFunctionListDuplicate(PetscFunctionList fl, PetscFunctionList *nl)
539: {
540: PetscFunctionBegin;
541: if (fl) {
542: PetscHMapFunc dup_map;
544: if (!*nl) {
545: PetscInt n;
547: PetscCall(PetscHMapFuncGetSize(fl->map, &n));
548: PetscCall(PetscFunctionListCreate_Private(n, nl));
549: }
550: dup_map = (*nl)->map;
551: PetscHMapFuncForEach(fl, name, func, PetscCall(PetscHMapFuncInsert_Private(dup_map, name, func)));
552: }
553: PetscFunctionReturn(PETSC_SUCCESS);
554: }