file_get_errhandler.c

mpi并行计算的c++代码 可用vc或gcc编译通过 可以用来搭建并行计算试验环境

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpiimpl.h"

#ifdef USE_ROMIO_FILE
/* Forward ref for the routine to extract and set the error handler
   in a ROMIO File structure.  FIXME: These should be imported from a common
   header file that is also used in mpich2_fileutil.c
 */
int MPIR_ROMIO_Get_file_errhand( MPI_File, MPI_Errhandler * );
int MPIR_ROMIO_Set_file_errhand( MPI_File, MPI_Errhandler );
void MPIR_Get_file_error_routine( MPID_Errhandler *, 
				  void (**)(MPI_File *, int *, ...), 
				  int * );
int MPIO_Err_return_file( MPI_File, int );
#endif

/* -- Begin Profiling Symbol Block for routine MPI_File_get_errhandler */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_File_get_errhandler = PMPI_File_get_errhandler
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_File_get_errhandler  MPI_File_get_errhandler
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_File_get_errhandler as PMPI_File_get_errhandler
#endif
/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
   the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#define MPI_File_get_errhandler PMPI_File_get_errhandler

#endif

#undef FUNCNAME
#define FUNCNAME MPI_File_get_errhandler

/*@
   MPI_File_get_errhandler - Get the error handler attached to a file

   Input Parameter:
. file - MPI file (handle) 

   Output Parameter:
. errhandler - handler currently associated with file (handle) 

.N ThreadSafeNoUpdate

.N Fortran

.N Errors
.N MPI_SUCCESS
@*/
int MPI_File_get_errhandler(MPI_File file, MPI_Errhandler *errhandler)
{
    static const char FCNAME[] = "MPI_File_get_errhandler";
    int mpi_errno = MPI_SUCCESS;
#ifndef USE_ROMIO_FILE
    MPID_File *file_ptr = NULL;
#endif
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_FILE_GET_ERRHANDLER);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPID_CS_ENTER();
    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_FILE_GET_ERRHANDLER);

#ifdef MPI_MODE_RDONLY
    /* Validate parameters, especially handles needing to be converted */
    /* FIXME: check for a valid file handle (fh) before converting to a pointer */
    
    /* Validate parameters and objects (post conversion) */
#   ifndef USE_ROMIO_FILE
    {
	MPID_File_get_ptr( file, file_ptr );
    }
#   endif
    
    /* Validate parameters and objects (post conversion) */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_ERRTEST_ARGNULL(errhandler,"errhandler",mpi_errno);
#           ifndef USE_ROMIO_FILE
	    {
		/* Validate file_ptr */
		MPID_File_valid_ptr( file_ptr, mpi_errno );
		/* If file_ptr is not valid, it will be reset to null */
	    }
#           endif
            if (mpi_errno) goto fn_fail;
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */
    
#   ifdef USE_ROMIO_FILE
    {
	MPI_Errhandler eh;
	MPID_Errhandler *e;
	MPIR_ROMIO_Get_file_errhand( file, &eh );
	if (!eh) {
	    MPID_Errhandler_get_ptr( MPI_ERRORS_RETURN, e );
	}
	else {
	    MPID_Errhandler_get_ptr( eh, e );
	}
	MPIU_Object_add_ref( e );
	*errhandler = e->handle;
    }
#   else
    {
	/* Check for default error handler */
	if (!file_ptr->errhandler) {
	    *errhandler = MPI_ERRORS_RETURN;
	}
	else {
	    *errhandler = file_ptr->errhandler->handle;
	    MPIU_Object_add_ref(file_ptr->errhandler);
	}
    }
#   endif

#else
    /* Dummy in case ROMIO is not defined */
    mpi_errno = MPI_ERR_INTERN;
#endif    
    /* ... end of body of routine ... */

  fn_exit:
    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_FILE_GET_ERRHANDLER);
    MPID_CS_EXIT();
    return mpi_errno;

  fn_fail:
    /* --BEGIN ERROR HANDLING-- */
#   ifdef HAVE_ERROR_CHECKING
    {
	mpi_errno = MPIR_Err_create_code(
	    mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER, "**mpi_file_get_errhandler",
	    "**mpi_file_get_errhandler %F %p", file, errhandler);
    }
#   endif
#ifdef MPI_MODE_RDONLY
#   ifdef USE_ROMIO_FILE
    {
	mpi_errno = MPIO_Err_return_file( file, mpi_errno );
    }
#   else
    {
	mpi_errno = MPIR_Err_return_file( file_ptr, FCNAME, mpi_errno );
    }
#   endif
#endif
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}