alloc_mem.c

MPI stands for the Message Passing Interface. Written by the MPI Forum (a large committee comprising

/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2007      Cisco, Inc.  All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */

#include "ompi_config.h"

#include <stdio.h>
#include <stdlib.h>

#include "ompi/mpi/c/bindings.h"
#include "ompi/info/info.h"
#include "ompi/mca/mpool/mpool.h"

#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Alloc_mem = PMPI_Alloc_mem
#endif

#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Alloc_mem";


int MPI_Alloc_mem(MPI_Aint size, MPI_Info info, void *baseptr)
{
    if (MPI_PARAM_CHECK) {
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if (size < 0 || NULL == baseptr) {
            return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG,
                                          FUNC_NAME);
        } else if (NULL == info || ompi_info_is_freed(info)) {
            return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_INFO,
                                          FUNC_NAME);
        }
    }
    
    /* Per these threads:

         http://www.open-mpi.org/community/lists/devel/2007/07/1977.php 
         http://www.open-mpi.org/community/lists/devel/2007/07/1979.php         

       If you call MPI_ALLOC_MEM with a size of 0, you get NULL
       back .*/
    if (0 == size) {
        *((void **) baseptr) = NULL;
        return MPI_SUCCESS;
    }
    
    *((void **) baseptr) = mca_mpool_base_alloc((size_t) size, info);
    if (NULL == *((void **) baseptr)) {
        return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_NO_MEM, 
                                      FUNC_NAME);
    }

    /* All done */

    return MPI_SUCCESS;
}