Actual source code: viewreg.c
1: #include <petsc/private/viewerimpl.h>
2: #include <petsc/private/hashtable.h>
3: #if defined(PETSC_HAVE_SAWS)
4: #include <petscviewersaws.h>
5: #endif
7: PetscFunctionList PetscViewerList = NULL;
9: PetscOptionsHelpPrinted PetscOptionsHelpPrintedSingleton = NULL;
10: KHASH_SET_INIT_STR(HTPrinted)
11: struct _n_PetscOptionsHelpPrinted {
12: khash_t(HTPrinted) *printed;
13: PetscSegBuffer strings;
14: };
16: PetscErrorCode PetscOptionsHelpPrintedDestroy(PetscOptionsHelpPrinted *hp)
17: {
18: PetscFunctionBegin;
19: if (!*hp) PetscFunctionReturn(PETSC_SUCCESS);
20: kh_destroy(HTPrinted, (*hp)->printed);
21: PetscCall(PetscSegBufferDestroy(&(*hp)->strings));
22: PetscCall(PetscFree(*hp));
23: PetscFunctionReturn(PETSC_SUCCESS);
24: }
26: /*@C
27: PetscOptionsHelpPrintedCreate - Creates an object used to manage tracking which help messages have
28: been printed so they will not be printed again.
30: Output Parameter:
31: . hp - the created object
33: Not Collective
35: Level: developer
37: .seealso: `PetscOptionsHelpPrintedCheck()`, `PetscOptionsHelpPrintChecked()`
38: @*/
39: PetscErrorCode PetscOptionsHelpPrintedCreate(PetscOptionsHelpPrinted *hp)
40: {
41: PetscFunctionBegin;
42: PetscCall(PetscNew(hp));
43: (*hp)->printed = kh_init(HTPrinted);
44: PetscCall(PetscSegBufferCreate(sizeof(char), 10000, &(*hp)->strings));
45: PetscFunctionReturn(PETSC_SUCCESS);
46: }
48: /*@C
49: PetscOptionsHelpPrintedCheck - Checks if a particular pre, name pair has previous been entered (meaning the help message was printed)
51: Not Collective
53: Input Parameters:
54: + hp - the object used to manage tracking what help messages have been printed
55: . pre - the prefix part of the string, many be `NULL`
56: - name - the string to look for (cannot be `NULL`)
58: Output Parameter:
59: . found - `PETSC_TRUE` if the string was already set
61: Level: intermediate
63: .seealso: `PetscOptionsHelpPrintedCreate()`
64: @*/
65: PetscErrorCode PetscOptionsHelpPrintedCheck(PetscOptionsHelpPrinted hp, const char *pre, const char *name, PetscBool *found)
66: {
67: size_t l1, l2;
68: #if !defined(PETSC_HAVE_THREADSAFETY)
69: char *both;
70: int newitem;
71: #endif
73: PetscFunctionBegin;
74: PetscCall(PetscStrlen(pre, &l1));
75: PetscCall(PetscStrlen(name, &l2));
76: if (l1 + l2 == 0) {
77: *found = PETSC_FALSE;
78: PetscFunctionReturn(PETSC_SUCCESS);
79: }
80: #if !defined(PETSC_HAVE_THREADSAFETY)
81: size_t lboth = l1 + l2 + 1;
82: PetscCall(PetscSegBufferGet(hp->strings, lboth, &both));
83: PetscCall(PetscStrncpy(both, pre, lboth));
84: PetscCall(PetscStrncpy(both + l1, name, l2 + 1));
85: kh_put(HTPrinted, hp->printed, both, &newitem);
86: if (!newitem) PetscCall(PetscSegBufferUnuse(hp->strings, lboth));
87: *found = newitem ? PETSC_FALSE : PETSC_TRUE;
88: #else
89: *found = PETSC_FALSE;
90: #endif
91: PetscFunctionReturn(PETSC_SUCCESS);
92: }
94: static PetscBool noviewer = PETSC_FALSE;
95: static PetscBool noviewers[PETSCVIEWERGETVIEWEROFFPUSHESMAX];
96: static PetscInt inoviewers = 0;
98: /*@
99: PetscOptionsPushGetViewerOff - sets if a `PetscOptionsGetViewer()` returns a viewer.
101: Logically Collective
103: Input Parameter:
104: . flg - `PETSC_TRUE` to turn off viewer creation, `PETSC_FALSE` to turn it on.
106: Level: developer
108: Note:
109: Calling `XXXViewFromOptions` in an inner loop can be expensive. This can appear, for example, when using
110: many small subsolves. Call this function to control viewer creation in `PetscOptionsGetViewer()`, thus removing the expensive `XXXViewFromOptions` calls.
112: Developer Notes:
113: Instead of using this approach, the calls to `PetscOptionsGetViewer()` can be moved into `XXXSetFromOptions()`
115: .seealso: [](sec_viewers), `PetscOptionsGetViewer()`, `PetscOptionsPopGetViewerOff()`
116: @*/
117: PetscErrorCode PetscOptionsPushGetViewerOff(PetscBool flg)
118: {
119: PetscFunctionBegin;
120: PetscCheck(inoviewers < PETSCVIEWERGETVIEWEROFFPUSHESMAX, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Too many PetscOptionsPushGetViewerOff(), perhaps you forgot PetscOptionsPopGetViewerOff()?");
122: noviewers[inoviewers++] = noviewer;
123: noviewer = flg;
124: PetscFunctionReturn(PETSC_SUCCESS);
125: }
127: /*@
128: PetscOptionsPopGetViewerOff - reset whether `PetscOptionsGetViewer()` returns a viewer.
130: Logically Collective
132: Level: developer
134: Note:
135: See `PetscOptionsPushGetViewerOff()`
137: .seealso: [](sec_viewers), `PetscOptionsGetViewer()`, `PetscOptionsPushGetViewerOff()`
138: @*/
139: PetscErrorCode PetscOptionsPopGetViewerOff(void)
140: {
141: PetscFunctionBegin;
142: PetscCheck(inoviewers, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Too many PetscOptionsPopGetViewerOff(), perhaps you forgot PetscOptionsPushGetViewerOff()?");
143: noviewer = noviewers[--inoviewers];
144: PetscFunctionReturn(PETSC_SUCCESS);
145: }
147: /*@
148: PetscOptionsGetViewerOff - does `PetscOptionsGetViewer()` return a viewer?
150: Logically Collective
152: Output Parameter:
153: . flg - whether viewers are returned.
155: Level: developer
157: Note:
158: See `PetscOptionsPushGetViewerOff()`
160: .seealso: [](sec_viewers), `PetscOptionsGetViewer()`, `PetscOptionsPushGetViewerOff()`, `PetscOptionsPopGetViewerOff()`
161: @*/
162: PetscErrorCode PetscOptionsGetViewerOff(PetscBool *flg)
163: {
164: PetscFunctionBegin;
165: PetscAssertPointer(flg, 1);
166: *flg = noviewer;
167: PetscFunctionReturn(PETSC_SUCCESS);
168: }
170: static PetscErrorCode PetscOptionsGetViewers_Single(MPI_Comm comm, const char value[], PetscViewer *viewer, PetscViewerFormat *format)
171: {
172: char *loc0_vtype = NULL, *loc1_fname = NULL, *loc2_fmt = NULL, *loc3_fmode = NULL;
173: PetscInt cnt;
174: size_t viewer_string_length;
175: const char *viewers[] = {PETSCVIEWERASCII, PETSCVIEWERBINARY, PETSCVIEWERDRAW, PETSCVIEWERSOCKET, PETSCVIEWERMATLAB, PETSCVIEWERSAWS, PETSCVIEWERVTK, PETSCVIEWERHDF5, PETSCVIEWERGLVIS, PETSCVIEWEREXODUSII, NULL};
177: PetscFunctionBegin;
178: PetscCall(PetscStrlen(value, &viewer_string_length));
179: if (!viewer_string_length) {
180: if (format) *format = PETSC_VIEWER_DEFAULT;
181: if (viewer) PetscCall(PetscViewerASCIIGetStdout(comm, viewer));
182: PetscFunctionReturn(PETSC_SUCCESS);
183: }
185: PetscCall(PetscStrallocpy(value, &loc0_vtype));
186: PetscCall(PetscStrchr(loc0_vtype, ':', &loc1_fname));
187: if (loc1_fname) {
188: *loc1_fname++ = 0;
189: PetscCall(PetscStrchr(loc1_fname, ':', &loc2_fmt));
190: }
191: if (loc2_fmt) {
192: *loc2_fmt++ = 0;
193: PetscCall(PetscStrchr(loc2_fmt, ':', &loc3_fmode));
194: }
195: if (loc3_fmode) *loc3_fmode++ = 0;
196: PetscCall(PetscStrendswithwhich(*loc0_vtype ? loc0_vtype : "ascii", viewers, &cnt));
197: PetscCheck(cnt <= (PetscInt)sizeof(viewers) - 1, comm, PETSC_ERR_ARG_OUTOFRANGE, "Unknown viewer type: %s", loc0_vtype);
198: if (viewer) {
199: if (!loc1_fname) {
200: switch (cnt) {
201: case 0:
202: PetscCall(PetscViewerASCIIGetStdout(comm, viewer));
203: break;
204: case 1:
205: if (!(*viewer = PETSC_VIEWER_BINARY_(comm))) PetscCall(PETSC_ERR_PLIB);
206: break;
207: case 2:
208: if (!(*viewer = PETSC_VIEWER_DRAW_(comm))) PetscCall(PETSC_ERR_PLIB);
209: break;
210: #if defined(PETSC_USE_SOCKET_VIEWER)
211: case 3:
212: if (!(*viewer = PETSC_VIEWER_SOCKET_(comm))) PetscCall(PETSC_ERR_PLIB);
213: break;
214: #endif
215: #if defined(PETSC_HAVE_MATLAB)
216: case 4:
217: if (!(*viewer = PETSC_VIEWER_MATLAB_(comm))) PetscCall(PETSC_ERR_PLIB);
218: break;
219: #endif
220: #if defined(PETSC_HAVE_SAWS)
221: case 5:
222: if (!(*viewer = PETSC_VIEWER_SAWS_(comm))) PetscCall(PETSC_ERR_PLIB);
223: break;
224: #endif
225: #if defined(PETSC_HAVE_HDF5)
226: case 7:
227: if (!(*viewer = PETSC_VIEWER_HDF5_(comm))) PetscCall(PETSC_ERR_PLIB);
228: break;
229: #endif
230: case 8:
231: if (!(*viewer = PETSC_VIEWER_GLVIS_(comm))) PetscCall(PETSC_ERR_PLIB);
232: break;
233: #if defined(PETSC_HAVE_EXODUSII)
234: case 9:
235: if (!(*viewer = PETSC_VIEWER_EXODUSII_(comm))) PetscCall(PETSC_ERR_PLIB);
236: break;
237: #endif
238: default:
239: SETERRQ(comm, PETSC_ERR_SUP, "Unsupported viewer %s", loc0_vtype);
240: }
241: } else {
242: if (loc2_fmt && !*loc1_fname && (cnt == 0)) { /* ASCII format without file name */
243: PetscCall(PetscViewerASCIIGetStdout(comm, viewer));
244: } else {
245: PetscFileMode fmode;
246: PetscBool flag = PETSC_FALSE;
248: PetscCall(PetscViewerCreate(comm, viewer));
249: PetscCall(PetscViewerSetType(*viewer, *loc0_vtype ? loc0_vtype : "ascii"));
250: fmode = FILE_MODE_WRITE;
251: if (loc3_fmode && *loc3_fmode) { /* Has non-empty file mode ("write" or "append") */
252: PetscCall(PetscEnumFind(PetscFileModes, loc3_fmode, (PetscEnum *)&fmode, &flag));
253: PetscCheck(flag, comm, PETSC_ERR_ARG_UNKNOWN_TYPE, "Unknown file mode: %s", loc3_fmode);
254: }
255: if (loc2_fmt) {
256: PetscBool tk, im;
257: PetscCall(PetscStrcmp(loc1_fname, "tikz", &tk));
258: PetscCall(PetscStrcmp(loc1_fname, "image", &im));
259: if (tk || im) {
260: PetscCall(PetscViewerDrawSetInfo(*viewer, NULL, loc2_fmt, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE));
261: *loc2_fmt = 0;
262: }
263: }
264: PetscCall(PetscViewerFileSetMode(*viewer, flag ? fmode : FILE_MODE_WRITE));
265: PetscCall(PetscViewerFileSetName(*viewer, loc1_fname));
266: if (*loc1_fname) PetscCall(PetscViewerDrawSetDrawType(*viewer, loc1_fname));
267: PetscCall(PetscViewerSetFromOptions(*viewer));
268: }
269: }
270: }
271: if (viewer) PetscCall(PetscViewerSetUp(*viewer));
272: if (loc2_fmt && *loc2_fmt) {
273: PetscViewerFormat tfmt;
274: PetscBool flag;
276: PetscCall(PetscEnumFind(PetscViewerFormats, loc2_fmt, (PetscEnum *)&tfmt, &flag));
277: if (format) *format = tfmt;
278: PetscCheck(flag, comm, PETSC_ERR_SUP, "Unknown viewer format %s", loc2_fmt);
279: } else if (viewer && (cnt == 6) && format) { /* Get format from VTK viewer */
280: PetscCall(PetscViewerGetFormat(*viewer, format));
281: }
282: PetscCall(PetscFree(loc0_vtype));
283: PetscFunctionReturn(PETSC_SUCCESS);
284: }
286: static PetscErrorCode PetscOptionsGetViewers_Internal(MPI_Comm comm, PetscOptions options, const char pre[], const char name[], PetscInt *n_max_p, PetscViewer viewer[], PetscViewerFormat format[], PetscBool *set, const char func_name[], PetscBool allow_multiple)
287: {
288: const char *value;
289: PetscBool flag, hashelp;
290: PetscInt n_max;
292: PetscFunctionBegin;
293: PetscAssertPointer(name, 4);
294: PetscAssertPointer(n_max_p, 5);
295: n_max = *n_max_p;
296: PetscCheck(n_max >= 0, comm, PETSC_ERR_ARG_OUTOFRANGE, "Invalid size %" PetscInt_FMT " of passed arrays", *n_max_p);
297: *n_max_p = 0;
299: if (set) *set = PETSC_FALSE;
300: PetscCall(PetscOptionsGetViewerOff(&flag));
301: if (flag) PetscFunctionReturn(PETSC_SUCCESS);
303: PetscCall(PetscOptionsHasHelp(NULL, &hashelp));
304: if (hashelp) {
305: PetscBool found;
307: if (!PetscOptionsHelpPrintedSingleton) PetscCall(PetscOptionsHelpPrintedCreate(&PetscOptionsHelpPrintedSingleton));
308: PetscCall(PetscOptionsHelpPrintedCheck(PetscOptionsHelpPrintedSingleton, pre, name, &found));
309: if (!found && viewer) {
310: PetscCall((*PetscHelpPrintf)(comm, "----------------------------------------\nViewer (-%s%s) options:\n", pre ? pre : "", name + 1));
311: PetscCall((*PetscHelpPrintf)(comm, " -%s%s ascii[:[filename][:[format][:append]]]: %s (%s)\n", pre ? pre : "", name + 1, "Prints object to stdout or ASCII file", func_name));
312: PetscCall((*PetscHelpPrintf)(comm, " -%s%s binary[:[filename][:[format][:append]]]: %s (%s)\n", pre ? pre : "", name + 1, "Saves object to a binary file", func_name));
313: PetscCall((*PetscHelpPrintf)(comm, " -%s%s draw[:[drawtype][:filename|format]] %s (%s)\n", pre ? pre : "", name + 1, "Draws object", func_name));
314: PetscCall((*PetscHelpPrintf)(comm, " -%s%s socket[:port]: %s (%s)\n", pre ? pre : "", name + 1, "Pushes object to a Unix socket", func_name));
315: PetscCall((*PetscHelpPrintf)(comm, " -%s%s saws[:communicatorname]: %s (%s)\n", pre ? pre : "", name + 1, "Publishes object to SAWs", func_name));
316: if (allow_multiple) PetscCall((*PetscHelpPrintf)(comm, " -%s%s v1[,v2,...]: %s (%s)\n", pre ? pre : "", name + 1, "Multiple viewers", func_name));
317: }
318: }
320: PetscCall(PetscOptionsFindPair(options, pre, name, &value, &flag));
321: if (flag) {
322: if (set) *set = PETSC_TRUE;
323: if (!value) {
324: PetscCheck(n_max > 0, comm, PETSC_ERR_ARG_SIZ, "More viewers (1) than max available (0)");
325: if (format) *format = PETSC_VIEWER_DEFAULT;
326: if (viewer) PetscCall(PetscViewerASCIIGetStdout(comm, viewer));
327: *n_max_p = 1;
328: } else {
329: char *loc0_viewer_string = NULL, *this_viewer_string = NULL;
330: size_t viewer_string_length;
332: PetscCall(PetscStrallocpy(value, &loc0_viewer_string));
333: PetscCall(PetscStrlen(loc0_viewer_string, &viewer_string_length));
334: this_viewer_string = loc0_viewer_string;
336: do {
337: PetscViewer *this_viewer;
338: PetscViewerFormat *this_viewer_format;
339: char *next_viewer_string = NULL;
340: char *comma_separator = NULL;
341: PetscInt n = *n_max_p;
343: PetscCheck(n < n_max, comm, PETSC_ERR_PLIB, "More viewers than max available (%d)", (int)n_max);
345: PetscCall(PetscStrchr(this_viewer_string, ',', &comma_separator));
346: if (comma_separator) {
347: PetscCheck(allow_multiple, comm, PETSC_ERR_ARG_OUTOFRANGE, "Trying to pass multiple viewers to %s: only one allowed. Use PetscOptionsGetViewers() instead", func_name);
348: *comma_separator = 0;
349: next_viewer_string = comma_separator + 1;
350: }
351: this_viewer = PetscSafePointerPlusOffset(viewer, n);
352: if (this_viewer) *this_viewer = NULL;
353: this_viewer_format = PetscSafePointerPlusOffset(format, n);
354: if (this_viewer_format) *this_viewer_format = PETSC_VIEWER_DEFAULT;
355: PetscCall(PetscOptionsGetViewers_Single(comm, this_viewer_string, this_viewer, this_viewer_format));
356: this_viewer_string = next_viewer_string;
357: (*n_max_p)++;
358: } while (this_viewer_string);
359: PetscCall(PetscFree(loc0_viewer_string));
360: }
361: }
362: PetscFunctionReturn(PETSC_SUCCESS);
363: }
365: /*@C
366: PetscOptionsGetViewer - Gets a viewer appropriate for the type indicated by the user
368: Collective
370: Input Parameters:
371: + comm - the communicator to own the viewer
372: . options - options database, use `NULL` for default global database
373: . pre - the string to prepend to the name or `NULL`
374: - name - the options database name that will be checked for
376: Output Parameters:
377: + viewer - the viewer, pass `NULL` if not needed
378: . format - the `PetscViewerFormat` requested by the user, pass `NULL` if not needed
379: - set - `PETSC_TRUE` if found, else `PETSC_FALSE`
381: Level: intermediate
383: Notes:
384: If no value is provided ascii:stdout is used
385: + ascii[:[filename][:[format][:append]]] - defaults to stdout - format can be one of ascii_info, ascii_info_detail, or ascii_matlab,
386: for example ascii::ascii_info prints just the information about the object not all details
387: unless :append is given filename opens in write mode, overwriting what was already there
388: . binary[:[filename][:[format][:append]]] - defaults to the file binaryoutput
389: . draw[:drawtype[:filename]] - for example, draw:tikz, draw:tikz:figure.tex or draw:x
390: . socket[:port] - defaults to the standard output port
391: - saws[:communicatorname] - publishes object to the Scientific Application Webserver (SAWs)
393: Use `PetscOptionsRestoreViewer()` after using the viewer, do not use `PetscViewerDestroy()`
395: You can control whether calls to this function create a viewer (or return early with *set of `PETSC_FALSE`) with
396: `PetscOptionsPushGetViewerOff()`. This is useful if calling many small subsolves, in which case XXXViewFromOptions can take
397: an appreciable fraction of the runtime.
399: If PETSc is configured with `--with-viewfromoptions=0` this function always returns with *set of `PETSC_FALSE`
401: This routine is thread-safe for accessing predefined `PetscViewer`s like `PETSC_VIEWER_STDOUT_SELF` but not for accessing
402: files by name.
404: .seealso: [](sec_viewers), `PetscOptionsRestoreViewer()`, `PetscOptionsGetReal()`, `PetscOptionsHasName()`, `PetscOptionsGetString()`,
405: `PetscOptionsGetIntArray()`, `PetscOptionsGetRealArray()`, `PetscOptionsBool()`
406: `PetscOptionsInt()`, `PetscOptionsString()`, `PetscOptionsReal()`,
407: `PetscOptionsName()`, `PetscOptionsBegin()`, `PetscOptionsEnd()`, `PetscOptionsHeadBegin()`,
408: `PetscOptionsStringArray()`, `PetscOptionsRealArray()`, `PetscOptionsScalar()`,
409: `PetscOptionsBoolGroupBegin()`, `PetscOptionsBoolGroup()`, `PetscOptionsBoolGroupEnd()`,
410: `PetscOptionsFList()`, `PetscOptionsEList()`, `PetscOptionsPushGetViewerOff()`, `PetscOptionsPopGetViewerOff()`,
411: `PetscOptionsGetViewerOff()`
412: @*/
413: PetscErrorCode PetscOptionsGetViewer(MPI_Comm comm, PetscOptions options, const char pre[], const char name[], PetscViewer *viewer, PetscViewerFormat *format, PetscBool *set)
414: {
415: PetscInt n_max = 1;
416: PetscBool set_internal;
418: PetscFunctionBegin;
419: if (viewer) *viewer = NULL;
420: if (format) *format = PETSC_VIEWER_DEFAULT;
421: PetscCall(PetscOptionsGetViewers_Internal(comm, options, pre, name, &n_max, viewer, format, &set_internal, PETSC_FUNCTION_NAME, PETSC_FALSE));
422: if (set_internal) PetscAssert(n_max == 1, comm, PETSC_ERR_PLIB, "Unexpected: %d != 1 viewers set", (int)n_max);
423: if (set) *set = set_internal;
424: PetscFunctionReturn(PETSC_SUCCESS);
425: }
427: /*@C
428: PetscOptionsRestoreViewer - restore a `PetscViewer` obtained from `PetscOptionsGetViewer()` or `PetscOptionsGetViewers()`
430: Collective
432: Input Parameter:
433: . viewer - the viewer
435: Level: intermediate
437: Developer Note:
438: This function exists to handle persistent viewers such as `PETSC_VIEWER_STDOUT_SELF` that may be shared between threads where
439: changing the reference count would not be thread safe.
441: .seealso: [](sec_viewers), `PetscOptionsGetViewer()`, `PetscOptionsGetReal()`, `PetscOptionsHasName()`, `PetscOptionsGetString()`,
442: `PetscOptionsGetIntArray()`, `PetscOptionsGetRealArray()`, `PetscOptionsBool()`
443: `PetscOptionsInt()`, `PetscOptionsString()`, `PetscOptionsReal()`,
444: `PetscOptionsName()`, `PetscOptionsBegin()`, `PetscOptionsEnd()`, `PetscOptionsHeadBegin()`,
445: `PetscOptionsStringArray()`, `PetscOptionsRealArray()`, `PetscOptionsScalar()`,
446: `PetscOptionsBoolGroupBegin()`, `PetscOptionsBoolGroup()`, `PetscOptionsBoolGroupEnd()`,
447: `PetscOptionsFList()`, `PetscOptionsEList()`, `PetscOptionsPushGetViewerOff()`, `PetscOptionsPopGetViewerOff()`,
448: `PetscOptionsGetViewerOff()`
449: @*/
450: PetscErrorCode PetscOptionsRestoreViewer(PetscViewer *viewer)
451: {
452: PetscFunctionBegin;
453: if (!*viewer) PetscFunctionReturn(PETSC_SUCCESS);
454: if (!((PetscObject)*viewer)->persistent) PetscCall(PetscViewerDestroy(viewer));
455: else *viewer = NULL;
456: PetscFunctionReturn(PETSC_SUCCESS);
457: }
459: /*@C
460: PetscOptionsGetViewers - Get multiple viewers from a comma-separated list in the options database
462: Collective
464: Input Parameters:
465: + comm - the communicator to own the viewers
466: . options - options database, use `NULL` for default global database
467: . pre - the string to prepend to the name or `NULL`
468: . name - the options database name that will be checked for
469: - n_max - on input: the maximum number of viewers; on output: the number of viewers in the comma-separated list
471: Output Parameters:
472: + viewers - an array to hold at least `n_max` `PetscViewer`s, or `NULL` if not needed; on output: if not `NULL`, the
473: first `n_max` entries are initialized `PetscViewer`s
474: . formats - an array to hold at least `n_max` `PetscViewerFormat`s, or `NULL` if not needed; on output: if not
475: `NULL`, the first `n_max` entries are valid `PetscViewewFormat`s
476: - set - `PETSC_TRUE` if found, else `PETSC_FALSE`
478: Level: intermediate
480: Note:
481: See `PetscOptionsGetViewer()` for how the format strings for the viewers are interpreted. Use `PetscOptionsRestoreViewer()` on each viewer, otherwise a memory leak will occur.
483: If PETSc is configured with `--with-viewfromoptions=0` this function always returns with `n_max` of 0 and `set` of `PETSC_FALSE`
485: .seealso: [](sec_viewers), `PetscOptionsGetViewer()`
486: @*/
487: PetscErrorCode PetscOptionsGetViewers(MPI_Comm comm, PetscOptions options, const char pre[], const char name[], PetscInt *n_max, PetscViewer viewers[], PetscViewerFormat formats[], PetscBool *set)
488: {
489: PetscFunctionBegin;
490: PetscCall(PetscOptionsGetViewers_Internal(comm, options, pre, name, n_max, viewers, formats, set, PETSC_FUNCTION_NAME, PETSC_TRUE));
491: PetscFunctionReturn(PETSC_SUCCESS);
492: }
494: /*@
495: PetscViewerCreate - Creates a viewing context. A `PetscViewer` represents a file, a graphical window, a Unix socket or a variety of other ways
496: of viewing a PETSc object
498: Collective
500: Input Parameter:
501: . comm - MPI communicator
503: Output Parameter:
504: . inviewer - location to put the `PetscViewer` context
506: Level: advanced
508: .seealso: [](sec_viewers), `PetscViewer`, `PetscViewerDestroy()`, `PetscViewerSetType()`, `PetscViewerType`
509: @*/
510: PetscErrorCode PetscViewerCreate(MPI_Comm comm, PetscViewer *inviewer)
511: {
512: PetscViewer viewer;
514: PetscFunctionBegin;
515: *inviewer = NULL;
516: PetscCall(PetscViewerInitializePackage());
517: PetscCall(PetscHeaderCreate(viewer, PETSC_VIEWER_CLASSID, "PetscViewer", "PetscViewer", "Viewer", comm, PetscViewerDestroy, PetscViewerView));
518: *inviewer = viewer;
519: viewer->data = NULL;
520: PetscFunctionReturn(PETSC_SUCCESS);
521: }
523: /*@C
524: PetscViewerSetType - Builds `PetscViewer` for a particular implementation.
526: Collective
528: Input Parameters:
529: + viewer - the `PetscViewer` context obtained with `PetscViewerCreate()`
530: - type - for example, `PETSCVIEWERASCII`
532: Options Database Key:
533: . -viewer_type <type> - Sets the type; use -help for a list of available methods (for instance, ascii)
535: Level: advanced
537: Note:
538: See `PetscViewerType` for possible values
540: .seealso: [](sec_viewers), `PetscViewer`, `PetscViewerCreate()`, `PetscViewerGetType()`, `PetscViewerType`, `PetscViewerPushFormat()`
541: @*/
542: PetscErrorCode PetscViewerSetType(PetscViewer viewer, PetscViewerType type)
543: {
544: PetscBool match;
545: PetscErrorCode (*r)(PetscViewer);
547: PetscFunctionBegin;
549: PetscAssertPointer(type, 2);
550: PetscCall(PetscObjectTypeCompare((PetscObject)viewer, type, &match));
551: if (match) PetscFunctionReturn(PETSC_SUCCESS);
553: /* cleanup any old type that may be there */
554: PetscTryTypeMethod(viewer, destroy);
555: viewer->ops->destroy = NULL;
556: viewer->data = NULL;
558: PetscCall(PetscMemzero(viewer->ops, sizeof(struct _PetscViewerOps)));
560: PetscCall(PetscFunctionListFind(PetscViewerList, type, &r));
561: PetscCheck(r, PetscObjectComm((PetscObject)viewer), PETSC_ERR_ARG_UNKNOWN_TYPE, "Unknown PetscViewer type given: %s", type);
563: PetscCall(PetscObjectChangeTypeName((PetscObject)viewer, type));
564: PetscCall((*r)(viewer));
565: PetscFunctionReturn(PETSC_SUCCESS);
566: }
568: /*@C
569: PetscViewerRegister - Adds a viewer to those available for use with `PetscViewerSetType()`
571: Not Collective
573: Input Parameters:
574: + sname - name of a new user-defined viewer
575: - function - routine to create method context
577: Level: developer
579: Note:
580: `PetscViewerRegister()` may be called multiple times to add several user-defined viewers.
582: Example Usage:
583: .vb
584: PetscViewerRegister("my_viewer_type", MyViewerCreate);
585: .ve
587: Then, your solver can be chosen with the procedural interface via
588: $ PetscViewerSetType(viewer, "my_viewer_type")
589: or at runtime via the option
590: $ -viewer_type my_viewer_type
592: .seealso: [](sec_viewers), `PetscViewerRegisterAll()`
593: @*/
594: PetscErrorCode PetscViewerRegister(const char *sname, PetscErrorCode (*function)(PetscViewer))
595: {
596: PetscFunctionBegin;
597: PetscCall(PetscViewerInitializePackage());
598: PetscCall(PetscFunctionListAdd(&PetscViewerList, sname, function));
599: PetscFunctionReturn(PETSC_SUCCESS);
600: }
602: /*@C
603: PetscViewerSetFromOptions - Sets various options for a viewer based on values in the options database.
605: Collective
607: Input Parameter:
608: . viewer - the viewer context
610: Level: intermediate
612: Note:
613: Must be called after `PetscViewerCreate()` but before the `PetscViewer` is used.
615: .seealso: [](sec_viewers), `PetscViewer`, `PetscViewerCreate()`, `PetscViewerSetType()`, `PetscViewerType`
616: @*/
617: PetscErrorCode PetscViewerSetFromOptions(PetscViewer viewer)
618: {
619: char vtype[256];
620: PetscBool flg;
622: PetscFunctionBegin;
625: if (!PetscViewerList) PetscCall(PetscViewerRegisterAll());
626: PetscObjectOptionsBegin((PetscObject)viewer);
627: PetscCall(PetscOptionsFList("-viewer_type", "Type of PetscViewer", "None", PetscViewerList, (char *)(((PetscObject)viewer)->type_name ? ((PetscObject)viewer)->type_name : PETSCVIEWERASCII), vtype, 256, &flg));
628: if (flg) PetscCall(PetscViewerSetType(viewer, vtype));
629: /* type has not been set? */
630: if (!((PetscObject)viewer)->type_name) PetscCall(PetscViewerSetType(viewer, PETSCVIEWERASCII));
631: PetscTryTypeMethod(viewer, setfromoptions, PetscOptionsObject);
633: /* process any options handlers added with PetscObjectAddOptionsHandler() */
634: PetscCall(PetscObjectProcessOptionsHandlers((PetscObject)viewer, PetscOptionsObject));
635: PetscCall(PetscViewerViewFromOptions(viewer, NULL, "-viewer_view"));
636: PetscOptionsEnd();
637: PetscFunctionReturn(PETSC_SUCCESS);
638: }
640: PetscErrorCode PetscViewerFlowControlStart(PetscViewer viewer, PetscInt *mcnt, PetscInt *cnt)
641: {
642: PetscFunctionBegin;
643: PetscCall(PetscViewerBinaryGetFlowControl(viewer, mcnt));
644: PetscCall(PetscViewerBinaryGetFlowControl(viewer, cnt));
645: PetscFunctionReturn(PETSC_SUCCESS);
646: }
648: PetscErrorCode PetscViewerFlowControlStepMain(PetscViewer viewer, PetscInt i, PetscInt *mcnt, PetscInt cnt)
649: {
650: MPI_Comm comm;
652: PetscFunctionBegin;
653: PetscCall(PetscObjectGetComm((PetscObject)viewer, &comm));
654: if (i >= *mcnt) {
655: *mcnt += cnt;
656: PetscCallMPI(MPI_Bcast(mcnt, 1, MPIU_INT, 0, comm));
657: }
658: PetscFunctionReturn(PETSC_SUCCESS);
659: }
661: PetscErrorCode PetscViewerFlowControlEndMain(PetscViewer viewer, PetscInt *mcnt)
662: {
663: MPI_Comm comm;
665: PetscFunctionBegin;
666: PetscCall(PetscObjectGetComm((PetscObject)viewer, &comm));
667: *mcnt = 0;
668: PetscCallMPI(MPI_Bcast(mcnt, 1, MPIU_INT, 0, comm));
669: PetscFunctionReturn(PETSC_SUCCESS);
670: }
672: PetscErrorCode PetscViewerFlowControlStepWorker(PetscViewer viewer, PetscMPIInt rank, PetscInt *mcnt)
673: {
674: MPI_Comm comm;
676: PetscFunctionBegin;
677: PetscCall(PetscObjectGetComm((PetscObject)viewer, &comm));
678: while (PETSC_TRUE) {
679: if (rank < *mcnt) break;
680: PetscCallMPI(MPI_Bcast(mcnt, 1, MPIU_INT, 0, comm));
681: }
682: PetscFunctionReturn(PETSC_SUCCESS);
683: }
685: PetscErrorCode PetscViewerFlowControlEndWorker(PetscViewer viewer, PetscInt *mcnt)
686: {
687: MPI_Comm comm;
689: PetscFunctionBegin;
690: PetscCall(PetscObjectGetComm((PetscObject)viewer, &comm));
691: while (PETSC_TRUE) {
692: PetscCallMPI(MPI_Bcast(mcnt, 1, MPIU_INT, 0, comm));
693: if (!*mcnt) break;
694: }
695: PetscFunctionReturn(PETSC_SUCCESS);
696: }