xref: /petsc/include/petscerror.h (revision 1db2f0e57964f94f63a3f5cf6bb1e5befdb56f30)
1 /*
2     Contains all error handling interfaces for PETSc.
3 */
4 #if !defined(__PETSCERROR_H)
5 #define __PETSCERROR_H
6 
7 #if defined(PETSC_HAVE_STRING_H)
8 #include <string.h> /* for strcmp */
9 #endif
10 
11 PETSC_EXTERN_CXX_BEGIN
12 
13 /*
14    Defines the directory where the compiled source is located; used
15    in printing error messages. Each makefile has an entry
16    LOCDIR	  =  thedirectory
17    and bmake/common_variables includes in CCPPFLAGS -D__SDIR__=${LOCDIR}
18    which is a flag passed to the C/C++ compilers. This declaration below
19    is only needed if some code is compiled without the -D__SDIR__
20 */
21 #if !defined(__INSDIR__)
22 #define __INSDIR__ "unknowndirectory/"
23 #endif
24 
25 /*
26    Defines the function where the compiled source is located; used
27    in printing error messages. This is defined here in case the user
28    does not declare it.
29 */
30 #if !defined(__FUNCT__)
31 #define __FUNCT__ "User provided function"
32 #endif
33 
34 /*
35      These are the generic error codes. These error codes are used
36      many different places in the PETSc source code. The string versions are
37      at src/sys/error/err.c any changes here must also be made there
38      These are also define in include/finclude/petscerror.h any CHANGES here
39      must be also made there.
40 
41 */
42 #define PETSC_ERR_MIN_VALUE        54   /* should always be one less then the smallest value */
43 
44 #define PETSC_ERR_MEM              55   /* unable to allocate requested memory */
45 #define PETSC_ERR_SUP              56   /* no support for requested operation */
46 #define PETSC_ERR_SUP_SYS          57   /* no support for requested operation on this computer system */
47 #define PETSC_ERR_ORDER            58   /* operation done in wrong order */
48 #define PETSC_ERR_SIG              59   /* signal received */
49 #define PETSC_ERR_FP               72   /* floating point exception */
50 #define PETSC_ERR_COR              74   /* corrupted PETSc object */
51 #define PETSC_ERR_LIB              76   /* error in library called by PETSc */
52 #define PETSC_ERR_PLIB             77   /* PETSc library generated inconsistent data */
53 #define PETSC_ERR_MEMC             78   /* memory corruption */
54 #define PETSC_ERR_CONV_FAILED      82   /* iterative method (KSP or SNES) failed */
55 #define PETSC_ERR_USER             83   /* user has not provided needed function */
56 #define PETSC_ERR_SYS              88   /* error in system call */
57 
58 #define PETSC_ERR_ARG_SIZ          60   /* nonconforming object sizes used in operation */
59 #define PETSC_ERR_ARG_IDN          61   /* two arguments not allowed to be the same */
60 #define PETSC_ERR_ARG_WRONG        62   /* wrong argument (but object probably ok) */
61 #define PETSC_ERR_ARG_CORRUPT      64   /* null or corrupted PETSc object as argument */
62 #define PETSC_ERR_ARG_OUTOFRANGE   63   /* input argument, out of range */
63 #define PETSC_ERR_ARG_BADPTR       68   /* invalid pointer argument */
64 #define PETSC_ERR_ARG_NOTSAMETYPE  69   /* two args must be same object type */
65 #define PETSC_ERR_ARG_NOTSAMECOMM  80   /* two args must be same communicators */
66 #define PETSC_ERR_ARG_WRONGSTATE   73   /* object in argument is in wrong state, e.g. unassembled mat */
67 #define PETSC_ERR_ARG_TYPENOTSET   89   /* the type of the object has not yet been set */
68 #define PETSC_ERR_ARG_INCOMP       75   /* two arguments are incompatible */
69 #define PETSC_ERR_ARG_NULL         85   /* argument is null that should not be */
70 #define PETSC_ERR_ARG_UNKNOWN_TYPE 86   /* type name doesn't match any registered type */
71 
72 #define PETSC_ERR_FILE_OPEN        65   /* unable to open file */
73 #define PETSC_ERR_FILE_READ        66   /* unable to read from file */
74 #define PETSC_ERR_FILE_WRITE       67   /* unable to write to file */
75 #define PETSC_ERR_FILE_UNEXPECTED  79   /* unexpected data in file */
76 
77 #define PETSC_ERR_MAT_LU_ZRPVT     71   /* detected a zero pivot during LU factorization */
78 #define PETSC_ERR_MAT_CH_ZRPVT     81   /* detected a zero pivot during Cholesky factorization */
79 
80 #define PETSC_ERR_INT_OVERFLOW     84   /* should always be one less then the smallest value */
81 
82 #define PETSC_ERR_FLOP_COUNT       90
83 #define PETSC_ERR_NOT_CONVERGED    91  /* solver did not converge */
84 #define PETSC_ERR_MAX_VALUE        92  /* this is always the one more than the largest error code */
85 
86 #define PetscStringizeArg(a) #a
87 #define PetscStringize(a) PetscStringizeArg(a)
88 #define __SDIR__ PetscStringize(__INSDIR__)
89 
90 #if defined(PETSC_USE_ERRORCHECKING)
91 
92 /*MC
93    SETERRQ - Macro that is called when an error has been detected,
94 
95    Synopsis:
96    PetscErrorCode SETERRQ(MPI_Comm comm,PetscErrorCode errorcode,char *message)
97 
98    Not Collective
99 
100    Input Parameters:
101 +  errorcode - nonzero error code, see the list of standard error codes in include/petscerror.h
102 -  message - error message
103 
104   Level: beginner
105 
106    Notes:
107     Once the error handler is called the calling function is then returned from with the given error code.
108 
109     See SETERRQ1(), SETERRQ2(), SETERRQ3() for versions that take arguments
110 
111     In Fortran MPI_Abort() is always called
112 
113     Experienced users can set the error handler with PetscPushErrorHandler().
114 
115    Concepts: error^setting condition
116 
117 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), CHKERRQ(), CHKMEMQ, SETERRQ1(), SETERRQ2(), SETERRQ3()
118 M*/
119 #define SETERRQ(comm,n,s)              return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s)
120 
121 /*MC
122    SETERRQ1 - Macro that is called when an error has been detected,
123 
124    Synopsis:
125    PetscErrorCode SETERRQ1(MPI_Comm comm,PetscErrorCode errorcode,char *formatmessage,arg)
126 
127    Not Collective
128 
129    Input Parameters:
130 +  errorcode - nonzero error code, see the list of standard error codes in include/petscerror.h
131 .  message - error message in the printf format
132 -  arg - argument (for example an integer, string or double)
133 
134   Level: beginner
135 
136    Notes:
137     Once the error handler is called the calling function is then returned from with the given error code.
138 
139    Experienced users can set the error handler with PetscPushErrorHandler().
140 
141    Concepts: error^setting condition
142 
143 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), CHKERRQ(), CHKMEMQ, SETERRQ(), SETERRQ2(), SETERRQ3()
144 M*/
145 #define SETERRQ1(comm,n,s,a1)          return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1)
146 
147 /*MC
148    SETERRQ2 - Macro that is called when an error has been detected,
149 
150    Synopsis:
151    PetscErrorCode SETERRQ2(PetscErrorCode errorcode,char *formatmessage,arg1,arg2)
152 
153    Not Collective
154 
155    Input Parameters:
156 +  errorcode - nonzero error code, see the list of standard error codes in include/petscerror.h
157 .  message - error message in the printf format
158 .  arg1 - argument (for example an integer, string or double)
159 -  arg2 - argument (for example an integer, string or double)
160 
161   Level: beginner
162 
163    Notes:
164     Once the error handler is called the calling function is then returned from with the given error code.
165 
166    Experienced users can set the error handler with PetscPushErrorHandler().
167 
168    Concepts: error^setting condition
169 
170 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), CHKERRQ(), CHKMEMQ, SETERRQ1(), SETERRQ3()
171 M*/
172 #define SETERRQ2(comm,n,s,a1,a2)       return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2)
173 
174 /*MC
175    SETERRQ3 - Macro that is called when an error has been detected,
176 
177    Synopsis:
178    PetscErrorCode SETERRQ3(PetscErrorCode errorcode,char *formatmessage,arg1,arg2,arg3)
179 
180    Not Collective
181 
182    Input Parameters:
183 +  errorcode - nonzero error code, see the list of standard error codes in include/petscerror.h
184 .  message - error message in the printf format
185 .  arg1 - argument (for example an integer, string or double)
186 .  arg2 - argument (for example an integer, string or double)
187 -  arg3 - argument (for example an integer, string or double)
188 
189   Level: beginner
190 
191    Notes:
192     Once the error handler is called the calling function is then returned from with the given error code.
193 
194     There are also versions for 4, 5, 6 and 7 arguments.
195 
196    Experienced users can set the error handler with PetscPushErrorHandler().
197 
198    Concepts: error^setting condition
199 
200 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), CHKERRQ(), CHKMEMQ, SETERRQ1(), SETERRQ2()
201 M*/
202 #define SETERRQ3(comm,n,s,a1,a2,a3)    return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2,a3)
203 
204 #define SETERRQ4(comm,n,s,a1,a2,a3,a4) return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2,a3,a4)
205 #define SETERRQ5(comm,n,s,a1,a2,a3,a4,a5)       return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2,a3,a4,a5)
206 #define SETERRQ6(comm,n,s,a1,a2,a3,a4,a5,a6)    return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2,a3,a4,a5,a6)
207 #define SETERRQ7(comm,n,s,a1,a2,a3,a4,a5,a6,a7) return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2,a3,a4,a5,a6,a7)
208 #define SETERRQ8(comm,n,s,a1,a2,a3,a4,a5,a6,a7,a8) return PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s,a1,a2,a3,a4,a5,a6,a7,a8)
209 #define SETERRABORT(comm,n,s)     do {PetscError(comm,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_INITIAL,s);MPI_Abort(comm,n);} while (0)
210 
211 /*MC
212    CHKERRQ - Checks error code, if non-zero it calls the error handler and then returns
213 
214    Synopsis:
215    PetscErrorCode CHKERRQ(PetscErrorCode errorcode)
216 
217    Not Collective
218 
219    Input Parameters:
220 .  errorcode - nonzero error code, see the list of standard error codes in include/petscerror.h
221 
222   Level: beginner
223 
224    Notes:
225     Once the error handler is called the calling function is then returned from with the given error code.
226 
227     Experienced users can set the error handler with PetscPushErrorHandler().
228 
229     CHKERRQ(n) is fundamentally a macro replacement for
230          if (n) return(PetscError(...,n,...));
231 
232     Although typical usage resembles "void CHKERRQ(PetscErrorCode)" as described above, for certain uses it is
233     highly inappropriate to use it in this manner as it invokes return(PetscErrorCode). In particular,
234     it cannot be used in functions which return(void) or any other datatype.  In these types of functions,
235     you can use CHKERRV() which returns without an error code (bad idea since the error is ignored or
236          if (n) {PetscError(....); return(YourReturnType);}
237     where you may pass back a PETSC_NULL to indicate an error. You can also call CHKERRABORT(comm,n) to have
238     MPI_Abort() returned immediately.
239 
240     In Fortran MPI_Abort() is always called
241 
242    Concepts: error^setting condition
243 
244 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), SETERRQ(), CHKMEMQ, SETERRQ1(), SETERRQ2(), SETERRQ2()
245 M*/
246 #define CHKERRQ(n)             do {if (PetscUnlikely(n)) return PetscError(PETSC_COMM_SELF,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_REPEAT," ");} while (0)
247 
248 #define CHKERRV(n)             do {if (PetscUnlikely(n)) {n = PetscError(PETSC_COMM_SELF,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_REPEAT," ");return;}} while(0)
249 #define CHKERRABORT(comm,n)    do {if (PetscUnlikely(n)) {PetscError(PETSC_COMM_SELF,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_REPEAT," ");MPI_Abort(comm,n);}} while (0)
250 #define CHKERRCONTINUE(n)      do {if (PetscUnlikely(n)) {PetscError(PETSC_COMM_SELF,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_REPEAT," ");}} while (0)
251 
252 #ifdef PETSC_CLANGUAGE_CXX
253 
254 /*MC
255    CHKERRXX - Checks error code, if non-zero it calls the C++ error handler which throws an exception
256 
257    Synopsis:
258    void CHKERRXX(PetscErrorCode errorcode)
259 
260    Not Collective
261 
262    Input Parameters:
263 .  errorcode - nonzero error code, see the list of standard error codes in include/petscerror.h
264 
265   Level: beginner
266 
267    Notes:
268     Once the error handler throws a ??? exception.
269 
270     You can use CHKERRV() which returns without an error code (bad idea since the error is ignored)
271     or CHKERRABORT(comm,n) to have MPI_Abort() returned immediately.
272 
273    Concepts: error^setting condition
274 
275 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), SETERRQ(), CHKERRQ(), CHKMEMQ
276 M*/
277 #define CHKERRXX(n)            do {if (PetscUnlikely(n)) {PetscError(PETSC_COMM_SELF,__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__,n,PETSC_ERROR_IN_CXX,0);}} while(0)
278 
279 #endif
280 
281 /*MC
282    CHKMEMQ - Checks the memory for corruption, calls error handler if any is detected
283 
284    Synopsis:
285    CHKMEMQ;
286 
287    Not Collective
288 
289   Level: beginner
290 
291    Notes:
292     Must run with the option -malloc_debug to enable this option
293 
294     Once the error handler is called the calling function is then returned from with the given error code.
295 
296     By defaults prints location where memory that is corrupted was allocated.
297 
298     Use CHKMEMA for functions that return void
299 
300    Concepts: memory corruption
301 
302 .seealso: PetscTraceBackErrorHandler(), PetscPushErrorHandler(), PetscError(), SETERRQ(), CHKMEMQ, SETERRQ1(), SETERRQ2(), SETERRQ3(),
303           PetscMallocValidate()
304 M*/
305 #define CHKMEMQ do {PetscErrorCode _7_ierr = PetscMallocValidate(__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__);CHKERRQ(_7_ierr);} while(0)
306 
307 #define CHKMEMA PetscMallocValidate(__LINE__,PETSC_FUNCTION_NAME,__FILE__,__SDIR__)
308 
309 #if defined(PETSC_UNDERSCORE_CHKERR)
310 extern  PetscErrorCode __gierr;
311 #define _   __gierr =
312 #define ___  CHKERRQ(__gierr);
313 #endif
314 
315 #else /* PETSC_USE_ERRORCHECKING */
316 
317 /*
318     These are defined to be empty for when error checking is turned off, with ./configure --with-errorchecking=0
319 */
320 
321 #define SETERRQ(c,n,s)
322 #define SETERRQ1(c,n,s,a1)
323 #define SETERRQ2(c,n,s,a1,a2)
324 #define SETERRQ3(c,n,s,a1,a2,a3)
325 #define SETERRQ4(c,n,s,a1,a2,a3,a4)
326 #define SETERRQ5(c,n,s,a1,a2,a3,a4,a5)
327 #define SETERRQ6(c,n,s,a1,a2,a3,a4,a5,a6)
328 #define SETERRABORT(comm,n,s)
329 
330 #define CHKERRQ(n)     ;
331 #define CHKERRABORT(comm,n) ;
332 #define CHKERRCONTINUE(n) ;
333 #define CHKMEMQ        ;
334 
335 #ifdef PETSC_CLANGUAGE_CXX
336 #define CHKERRXX(n) ;
337 #endif
338 
339 #if !defined(PETSC_SKIP_UNDERSCORE_CHKERR)
340 #define _
341 #define ___
342 #endif
343 
344 #endif /* PETSC_USE_ERRORCHECKING */
345 
346 /*E
347   PetscErrorType - passed to the PETSc error handling routines indicating if this is the first or a later call to the error handlers
348 
349   Level: advanced
350 
351   PETSC_ERROR_IN_CXX indicates the error was detected in C++ and an exception should be generated
352 
353   Developer Notes: This is currently used to decide when to print the detailed information about the run in PetscTraceBackErrorHandling()
354 
355 .seealso: PetscError(), SETERRXX()
356 E*/
357 typedef enum {PETSC_ERROR_INITIAL=0,PETSC_ERROR_REPEAT=1,PETSC_ERROR_IN_CXX = 2} PetscErrorType;
358 
359 extern PetscErrorCode  PetscErrorPrintfInitialize(void);
360 extern PetscErrorCode  PetscErrorMessage(int,const char*[],char **);
361 extern PetscErrorCode  PetscTraceBackErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
362 extern PetscErrorCode  PetscIgnoreErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
363 extern PetscErrorCode  PetscEmacsClientErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
364 extern PetscErrorCode  PetscMPIAbortErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
365 extern PetscErrorCode  PetscAbortErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
366 extern PetscErrorCode  PetscAttachDebuggerErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
367 extern PetscErrorCode  PetscReturnErrorHandler(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*);
368 extern PetscErrorCode  PetscError(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,...);
369 extern PetscErrorCode  PetscPushErrorHandler(PetscErrorCode (*handler)(MPI_Comm,int,const char*,const char*,const char*,PetscErrorCode,PetscErrorType,const char*,void*),void*);
370 extern PetscErrorCode  PetscPopErrorHandler(void);
371 extern PetscErrorCode  PetscDefaultSignalHandler(int,void*);
372 extern PetscErrorCode  PetscPushSignalHandler(PetscErrorCode (*)(int,void *),void*);
373 extern PetscErrorCode  PetscPopSignalHandler(void);
374 
375 typedef enum {PETSC_FP_TRAP_OFF=0,PETSC_FP_TRAP_ON=1} PetscFPTrap;
376 extern PetscErrorCode   PetscSetFPTrap(PetscFPTrap);
377 
378 /*
379       Allows the code to build a stack frame as it runs
380 */
381 #if defined(PETSC_USE_DEBUG) && !defined(PETSC_USE_PTHREAD)
382 
383 #define PETSCSTACKSIZE 64
384 
385 typedef struct  {
386   const char *function[PETSCSTACKSIZE];
387   const char *file[PETSCSTACKSIZE];
388   const char *directory[PETSCSTACKSIZE];
389         int  line[PETSCSTACKSIZE];
390         int currentsize;
391 } PetscStack;
392 
393 extern  PetscStack *petscstack;
394 extern PetscErrorCode   PetscStackCopy(PetscStack*,PetscStack*);
395 extern PetscErrorCode   PetscStackPrint(PetscStack*,FILE* fp);
396 
397 #define PetscStackActive (petscstack != 0)
398 
399 /*MC
400    PetscFunctionBegin - First executable line of each PETSc function
401         used for error handling.
402 
403    Synopsis:
404    void PetscFunctionBegin;
405 
406    Not Collective
407 
408    Usage:
409 .vb
410      int something;
411 
412      PetscFunctionBegin;
413 .ve
414 
415    Notes:
416      Not available in Fortran
417 
418    Level: developer
419 
420 .seealso: PetscFunctionReturn()
421 
422 .keywords: traceback, error handling
423 M*/
424 #define PetscFunctionBegin \
425   do {                                                                  \
426     if (petscstack && (petscstack->currentsize < PETSCSTACKSIZE)) {     \
427       petscstack->function[petscstack->currentsize]  = PETSC_FUNCTION_NAME; \
428       petscstack->file[petscstack->currentsize]      = __FILE__;        \
429       petscstack->directory[petscstack->currentsize] = __SDIR__;        \
430       petscstack->line[petscstack->currentsize]      = __LINE__;        \
431       petscstack->currentsize++;                                        \
432     }                                                                   \
433     PetscCheck__FUNCT__();                                              \
434   } while (0)
435 
436 #define PetscCheck__FUNCT__() do { \
437     if (strcmp(PETSC_FUNCTION_NAME,__FUNCT__) && strcmp(__FUNCT__,"User provided function")) { \
438       (*PetscErrorPrintf)("%s%s:%d: __FUNCT__=\"%s\" does not agree with %s=\"%s\"\n",__SDIR__,__FILE__,__LINE__,__FUNCT__,PetscStringize(PETSC_FUNCTION_NAME),PETSC_FUNCTION_NAME); \
439     }                                                                   \
440   } while (0)
441 
442 #define PetscStackPush(n) \
443   do {if (petscstack && (petscstack->currentsize < PETSCSTACKSIZE)) {    \
444     petscstack->function[petscstack->currentsize]  = n; \
445     petscstack->file[petscstack->currentsize]      = "unknown"; \
446     petscstack->directory[petscstack->currentsize] = "unknown"; \
447     petscstack->line[petscstack->currentsize]      = 0; \
448     petscstack->currentsize++; \
449   } CHKMEMQ;} while (0)
450 
451 #define PetscStackPop \
452   do {CHKMEMQ; if (petscstack && petscstack->currentsize > 0) {	\
453     petscstack->currentsize--; \
454     petscstack->function[petscstack->currentsize]  = 0; \
455     petscstack->file[petscstack->currentsize]      = 0; \
456     petscstack->directory[petscstack->currentsize] = 0; \
457     petscstack->line[petscstack->currentsize]      = 0; \
458   }} while (0)
459 
460 /*MC
461    PetscFunctionReturn - Last executable line of each PETSc function
462         used for error handling. Replaces return()
463 
464    Synopsis:
465    void PetscFunctionReturn(0);
466 
467    Not Collective
468 
469    Usage:
470 .vb
471     ....
472      PetscFunctionReturn(0);
473    }
474 .ve
475 
476    Notes:
477      Not available in Fortran
478 
479    Level: developer
480 
481 .seealso: PetscFunctionBegin()
482 
483 .keywords: traceback, error handling
484 M*/
485 #define PetscFunctionReturn(a) \
486   do {\
487   if (petscstack && petscstack->currentsize > 0) {	\
488     petscstack->currentsize--; \
489     petscstack->function[petscstack->currentsize]  = 0; \
490     petscstack->file[petscstack->currentsize]      = 0; \
491     petscstack->directory[petscstack->currentsize] = 0; \
492     petscstack->line[petscstack->currentsize]      = 0; \
493   }\
494   return(a);} while (0)
495 
496 #define PetscFunctionReturnVoid() \
497   do {\
498   if (petscstack && petscstack->currentsize > 0) {	\
499     petscstack->currentsize--; \
500     petscstack->function[petscstack->currentsize]  = 0; \
501     petscstack->file[petscstack->currentsize]      = 0; \
502     petscstack->directory[petscstack->currentsize] = 0; \
503     petscstack->line[petscstack->currentsize]      = 0; \
504   }\
505   return;} while (0)
506 
507 #else
508 
509 #define PetscFunctionBegin
510 #define PetscFunctionReturn(a)  return(a)
511 #define PetscFunctionReturnVoid() return
512 #define PetscStackPop     CHKMEMQ
513 #define PetscStackPush(f) CHKMEMQ
514 #define PetscStackActive        0
515 
516 #endif
517 
518 /*
519     PetscStackCall - Calls an external library routine or user function after pushing the name of the routine on the stack.
520 
521    Input Parameters:
522 +   name - string that gives the name of the function being called
523 -   routine - actual call to the routine
524 
525    Developer Note: this is so that when a user or external library routine results in a crash or corrupts memory, they get blamed instead of PETSc.
526 
527 */
528 #define PetscStackCall(name,routine) PetscStackPush(name);routine;PetscStackPop;
529 
530 extern PetscErrorCode   PetscStackCreate(void);
531 extern PetscErrorCode   PetscStackView(PetscViewer);
532 extern PetscErrorCode   PetscStackDestroy(void);
533 extern PetscErrorCode   PetscStackPublish(void);
534 extern PetscErrorCode   PetscStackDepublish(void);
535 
536 
537 PETSC_EXTERN_CXX_END
538 #endif
539