Actual source code: zstart.c

  1: /*
  2:   This file contains Fortran stubs for PetscInitialize and Finalize.
  3: */

  5: /*
  6:     This is to prevent the Cray T3D version of MPI (University of Edinburgh)
  7:   from stupidly redefining MPI_INIT(). They put this in to detect errors
  8:   in C code,but here I do want to be calling the Fortran version from a
  9:   C subroutine.
 10: */
 11: #define T3DMPI_FORTRAN
 12: #define T3EMPI_FORTRAN

 14: #include <petsc/private/ftnimpl.h>

 16: #if defined(PETSC_HAVE_FORTRAN_CAPS)
 17:   #define petscinitializef_          PETSCINITIALIZEF
 18:   #define mpi_init_                  MPI_INIT
 19:   #define petscgetcomm_              PETSCGETCOMM
 20:   #define petsccommandargumentcount_ PETSCCOMMANDARGUMENTCOUNT
 21:   #define petscgetcommandargument_   PETSCGETCOMMANDARGUMENT
 22: #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
 23:   #define petscinitializef_          petscinitializef
 24:   #define mpi_init_                  mpi_init
 25:   #define petscgetcomm_              petscgetcomm
 26:   #define petsccommandargumentcount_ petsccommandargumentcount
 27:   #define petscgetcommandargument_   petscgetcommandargument
 28: #endif

 30: /*
 31:     The extra _ is because the f2c compiler puts an
 32:   extra _ at the end if the original routine name
 33:   contained any _.
 34: */
 35: #if defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE)
 36:   #define mpi_init_ mpi_init__
 37: #endif

 39: #if defined(PETSC_HAVE_MPIUNI)
 40:   #if defined(mpi_init_)
 41:     #undef mpi_init_
 42:     #if defined(PETSC_HAVE_FORTRAN_CAPS)
 43:       #define mpi_init_ PETSC_MPI_INIT
 44:     #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
 45:       #define mpi_init_ petsc_mpi_init
 46:     #elif defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE)
 47:       #define mpi_init_ petsc_mpi_init__
 48:     #endif
 49:   #else /* mpi_init_ */
 50:     #define mpi_init_ petsc_mpi_init_
 51:   #endif /* mpi_init_ */
 52: #endif   /* PETSC_HAVE_MPIUNI */

 54: PETSC_EXTERN void mpi_init_(int *);
 55: PETSC_EXTERN void petscgetcomm_(PetscMPIInt *);

 57: /*
 58:      Different Fortran compilers handle command lines in different ways
 59: */
 60: PETSC_EXTERN int            petsccommandargumentcount_(void);
 61: PETSC_EXTERN void           petscgetcommandargument_(int *, char *, PETSC_FORTRAN_CHARLEN_T);
 62: PETSC_EXTERN PetscErrorCode PetscMallocAlign(size_t, PetscBool, int, const char[], const char[], void **);
 63: PETSC_EXTERN PetscErrorCode PetscFreeAlign(void *, int, const char[], const char[]);
 64: PETSC_INTERN int            PetscGlobalArgc;
 65: PETSC_INTERN char         **PetscGlobalArgs, **PetscGlobalArgsFortran;

 67: /*
 68:     Reads in Fortran command line arguments and sends them to
 69:   all processors.
 70: */

 72: PetscErrorCode PETScParseFortranArgs_Private(int *argc, char ***argv)
 73: {
 74:   int         i;
 75:   int         warg = 256;
 76:   PetscMPIInt rank;
 77:   char       *p;

 79:   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
 80:   if (rank == 0) { *argc = 1 + petsccommandargumentcount_(); }
 81:   PetscCallMPI(MPI_Bcast(argc, 1, MPI_INT, 0, PETSC_COMM_WORLD));

 83:   /* PetscTrMalloc() not yet set, so don't use PetscMalloc() */
 84:   PetscCall(PetscMallocAlign((*argc + 1) * (warg * sizeof(char) + sizeof(char *)), PETSC_FALSE, 0, NULL, NULL, (void **)argv));
 85:   (*argv)[0] = (char *)(*argv + *argc + 1);

 87:   if (rank == 0) {
 88:     PetscCall(PetscMemzero((*argv)[0], (*argc) * warg * sizeof(char)));
 89:     for (i = 0; i < *argc; i++) {
 90:       (*argv)[i + 1] = (*argv)[i] + warg;
 91:       petscgetcommandargument_(&i, (*argv)[i], warg);
 92:       /* zero out garbage at end of each argument */
 93:       p = (*argv)[i] + warg - 1;
 94:       while (p > (*argv)[i]) {
 95:         if (*p == ' ') *p = 0;
 96:         p--;
 97:       }
 98:     }
 99:   }
100:   PetscCallMPI(MPI_Bcast((*argv)[0], *argc * warg, MPI_CHAR, 0, PETSC_COMM_WORLD));
101:   if (rank) {
102:     for (i = 0; i < *argc; i++) (*argv)[i + 1] = (*argv)[i] + warg;
103:   }
104:   return PETSC_SUCCESS;
105: }

107: /* -----------------------------------------------------------------------------------------------*/

109: PETSC_INTERN PetscErrorCode PetscPreMPIInit_Private(void);

111: PETSC_INTERN PetscErrorCode PetscInitFortran_Private(const char *filename, PetscInt len)
112: {
113:   char *tmp = NULL;

115:   PetscFunctionBegin;
116:   PetscCall(PetscInitializeFortran());
117:   PetscCall(PETScParseFortranArgs_Private(&PetscGlobalArgc, &PetscGlobalArgsFortran));
118:   PetscGlobalArgs = PetscGlobalArgsFortran;
119:   if (filename != PETSC_NULL_CHARACTER_Fortran) { /* filename comes from Fortran so may have blanking padding that needs removal */
120:     while ((len > 0) && (filename[len - 1] == ' ')) len--;
121:     PetscCall(PetscMalloc1(len + 1, &tmp));
122:     PetscCall(PetscStrncpy(tmp, filename, len + 1));
123:   }
124:   PetscCall(PetscOptionsInsert(NULL, &PetscGlobalArgc, &PetscGlobalArgsFortran, tmp));
125:   PetscCall(PetscFree(tmp));
126:   PetscFunctionReturn(PETSC_SUCCESS);
127: }

129: PETSC_EXTERN void petscinitializef_(char *filename, char *help, PetscErrorCode *ierr, PETSC_FORTRAN_CHARLEN_T len, PETSC_FORTRAN_CHARLEN_T helplen)
130: {
131:   int         j, i;
132:   int         flag;
133:   char        name[256] = {0};
134:   PetscMPIInt f_petsc_comm_world;

136:   *ierr = PETSC_SUCCESS;
137:   if (PetscInitializeCalled) return;
138:   i = 0;
139:   petscgetcommandargument_(&i, name, sizeof(name));
140:   /* Eliminate spaces at the end of the string */
141:   for (j = sizeof(name) - 2; j >= 0; j--) {
142:     if (name[j] != ' ') {
143:       name[j + 1] = 0;
144:       break;
145:     }
146:   }
147:   if (j < 0) {
148:     *ierr = PetscStrncpy(name, "Unknown Name", 256);
149:     if (*ierr) return;
150:   }

152:   /* check if PETSC_COMM_WORLD is initialized by the user in Fortran */
153:   petscgetcomm_(&f_petsc_comm_world);
154:   MPI_Initialized(&flag);
155:   if (!flag) {
156:     PetscMPIInt mierr;

158:     if (f_petsc_comm_world) {
159:       *ierr = (*PetscErrorPrintf)("You cannot set PETSC_COMM_WORLD if you have not initialized MPI first\n");
160:       return;
161:     }

163:     *ierr = PetscPreMPIInit_Private();
164:     if (*ierr) return;
165:     mpi_init_(&mierr);
166:     if (mierr) {
167:       *ierr = (*PetscErrorPrintf)("PetscInitialize: Calling Fortran MPI_Init()\n");
168:       *ierr = (PetscErrorCode)mierr;
169:       return;
170:     }
171:     PetscBeganMPI = PETSC_TRUE;
172:   }
173:   if (f_petsc_comm_world) PETSC_COMM_WORLD = MPI_Comm_f2c(*(MPI_Fint *)&f_petsc_comm_world); /* User called MPI_INITIALIZE() and changed PETSC_COMM_WORLD */
174:   else PETSC_COMM_WORLD = MPI_COMM_WORLD;

176:   *ierr = PetscInitialize_Common(name, filename, help, PETSC_TRUE, (PetscInt)len);
177:   if (*ierr) {
178:     (void)(*PetscErrorPrintf)("PetscInitialize:PetscInitialize_Common\n");
179:     return;
180:   }
181: }