2: #include <../src/vec/pf/pfimpl.h>

  4: /*
  5:         This PF generates a function on the fly and loads it into the running
  6:    program.
  7: */

  9: static PetscErrorCode PFView_String(void *value,PetscViewer viewer)
 10: {
 11:   PetscBool      iascii;

 13:   PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&iascii);
 14:   if (iascii) {
 15:     PetscViewerASCIIPrintf(viewer,"String = %s\n",(char*)value);
 16:   }
 17:   return 0;
 18: }

 20: static PetscErrorCode PFDestroy_String(void *value)
 21: {
 22:   PetscFree(value);
 23:   return 0;
 24: }

 26: /*
 27:     PFStringCreateFunction - Creates a function from a string

 29:    Collective over PF

 31:   Input Parameters:
 32: +    pf - the function object
 33: -    string - the string that defines the function

 35:   Output Parameter:
 36: .    f - the function pointer.

 38: .seealso: PFSetFromOptions()

 40: */
 41: PetscErrorCode  PFStringCreateFunction(PF pf,char *string,void **f)
 42: {
 43: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES)
 44:   char           task[1024],tmp[256],lib[PETSC_MAX_PATH_LEN],username[64];
 45:   FILE           *fd;
 46:   PetscBool      tmpshared,wdshared,keeptmpfiles = PETSC_FALSE;
 47:   MPI_Comm       comm;
 48: #endif

 50: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES)
 51:   PetscFree(pf->data);
 52:   PetscStrallocpy(string,(char**)&pf->data);

 54:   /* create the new C function and compile it */
 55:   PetscSharedTmp(PetscObjectComm((PetscObject)pf),&tmpshared);
 56:   PetscSharedWorkingDirectory(PetscObjectComm((PetscObject)pf),&wdshared);
 57:   if (tmpshared) {  /* do it in /tmp since everyone has one */
 58:     PetscGetTmp(PetscObjectComm((PetscObject)pf),tmp,PETSC_MAX_PATH_LEN);
 59:     PetscObjectGetComm((PetscObject)pf,&comm);
 60:   } else if (!wdshared) {  /* each one does in private /tmp */
 61:     PetscGetTmp(PetscObjectComm((PetscObject)pf),tmp,PETSC_MAX_PATH_LEN);
 62:     comm = PETSC_COMM_SELF;
 63:   } else { /* do it in current directory */
 64:     PetscStrcpy(tmp,".");
 65:     PetscObjectGetComm((PetscObject)pf,&comm);
 66:   }
 67:   PetscOptionsGetBool(((PetscObject)pf)->options,((PetscObject)pf)->prefix,"-pf_string_keep_files",&keeptmpfiles,NULL);
 68:   if (keeptmpfiles) sprintf(task,"cd %s ; mkdir ${USERNAME} ; cd ${USERNAME} ; \\cp -f ${PETSC_DIR}/src/pf/impls/string/makefile ./makefile ; ke  MIN=%d NOUT=%d petscdlib STRINGFUNCTION=\"%s\" ; sync\n",tmp,(int)pf->dimin,(int)pf->dimout,string);
 69:   else              sprintf(task,"cd %s ; mkdir ${USERNAME} ; cd ${USERNAME} ; \\cp -f ${PETSC_DIR}/src/pf/impls/string/makefile ./makefile ; make  MIN=%d NOUT=%d -f makefile petscdlib STRINGFUNCTION=\"%s\" ; \\rm -f makefile petscdlib.c libpetscdlib.a ;  sync\n",tmp,(int)pf->dimin,(int)pf->dimout,string);

 71: #if defined(PETSC_HAVE_POPEN)
 72:   PetscPOpen(comm,NULL,task,"r",&fd);
 73:   PetscPClose(comm,fd);
 74: #else
 75:   SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP_SYS,"Cannot run external programs on this machine");
 76: #endif

 78:   MPI_Barrier(comm);

 80:   /* load the apply function from the dynamic library */
 81:   PetscGetUserName(username,64);
 82:   sprintf(lib,"%s/%s/libpetscdlib",tmp,username);
 83:   PetscDLLibrarySym(comm,NULL,lib,"PFApply_String",f);
 85: #endif
 86:   return 0;
 87: }

 89: static PetscErrorCode PFSetFromOptions_String(PetscOptionItems *PetscOptionsObject,PF pf)
 90: {
 91:   PetscBool      flag;
 92:   char           value[PETSC_MAX_PATH_LEN];
 93:   PetscErrorCode (*f)(void*,PetscInt,const PetscScalar*,PetscScalar*) = NULL;

 95:   PetscOptionsHead(PetscOptionsObject,"String function options");
 96:   PetscOptionsString("-pf_string","Enter the function","PFStringCreateFunction","",value,sizeof(value),&flag);
 97:   if (flag) {
 98:     PFStringCreateFunction(pf,value,(void**)&f);
 99:     pf->ops->apply = f;
100:   }
101:   PetscOptionsTail();
102:   return 0;
103: }

105: typedef PetscErrorCode (*FCN)(void*,PetscInt,const PetscScalar*,PetscScalar*); /* force argument to next function to not be extern C*/

107: PETSC_EXTERN PetscErrorCode PFCreate_String(PF pf,void *value)
108: {
109:   FCN            f = NULL;

111:   if (value) {
112:     PFStringCreateFunction(pf,(char*)value,(void**)&f);
113:   }
114:   PFSet(pf,f,NULL,PFView_String,PFDestroy_String,NULL);
115:   pf->ops->setfromoptions = PFSetFromOptions_String;
116:   return 0;
117: }