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103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/*****************************************************************************
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* CVS File Information :
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* $RCSfile$
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* Author: rrdrake $
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* Date: 2009/07/17 15:14:49 $
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* Revision: 1.5 $
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****************************************************************************/
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/******************************************************************************/
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/* FILE ******************** _MPI_REQ_UTIL.c ************************/
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/******************************************************************************/
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/* Author : Lisa Alano July 12 2002 */
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/* Copyright (c) 2002 University of California Regents */
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/******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include "mpi.h"
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MPI_Request _MPI_New_Request(void* buffer,
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int count,
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MPI_Datatype datatype,
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int tag,
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MPI_Comm comm,
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int send) {
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MPI_Request request = 0;
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int i;
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int j;
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/* ----------------------------------------------- */
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/* We search through the array of lists looking */
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/* for a request object that is not in use. */
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/* ----------------------------------------------- */
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for(i=0;i<_MPI_REQ_ARRAY_SIZE;++i) {
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for(j=0;j<_MPI_PREALLOCATION_SIZE;++j) {
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if (_MPI_REQ_LIST_OF_LISTS[i][j].valid == _MPI_NOT_VALID) {
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request = _MPI_REQ_LIST_OF_LISTS[i]+j;
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break;
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}
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}
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if (request) break;
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}
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/* ----------------------------------------------- */
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/* Allocate another strip of the request list */
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/* ----------------------------------------------- */
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if (!request) {
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/* Extend the list of lists (keeps old requests in same place */
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i = _MPI_REQ_ARRAY_SIZE++;
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_MPI_REQ_LIST_OF_LISTS = (_MPI_REQUEST_OBJECT **)
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_MPI_safeRealloc(_MPI_REQ_LIST_OF_LISTS,_MPI_REQ_ARRAY_SIZE*sizeof(_MPI_REQUEST_OBJECT*),
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"Error with malloc of REQ_LIST");
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if (!_MPI_REQ_LIST_OF_LISTS) return MPI_REQUEST_NULL; /* malloc failure only */
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/* Allocate a new strip */
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_MPI_REQ_LIST_OF_LISTS[i] =
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_MPI_safeMalloc(_MPI_PREALLOCATION_SIZE*sizeof(_MPI_REQUEST_OBJECT),
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"Error malloc a new REQ strip");
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/* Zero out the new strip and select a new "good" req object */
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for(j=0;j<_MPI_PREALLOCATION_SIZE;++j) {
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_MPI_Req_Invalid(_MPI_REQ_LIST_OF_LISTS[i]+j);
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}
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request = _MPI_REQ_LIST_OF_LISTS[i];
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}
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/* ----------------------------------------------- */
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/* Fill in the request object */
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/* ----------------------------------------------- */
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request->buffer = buffer;
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request->count = count;
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request->type = datatype;
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request->tag = tag;
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request->comm = comm;
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request->send = send;
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request->valid = _MPI_VALID;
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request->cancel = 0; /* false */
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return request;
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}
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int _MPI_Req_Invalid (MPI_Request request) {
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_MPI_COVERAGE();
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request->buffer = (void *)0;
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request->count = _MPI_NOT_VALID;
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request->tag = _MPI_NOT_VALID;
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request->comm = MPI_COMM_NULL;
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request->send = _MPI_NOT_VALID;
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request->valid = _MPI_NOT_VALID;
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request->cancel = 0; /* false */
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return MPI_SUCCESS;
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}
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int _MPI_Check_Request_Array(int count, MPI_Request array[]) {
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int index;
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for(index = 0; index<count; index++) {
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if (array[index] != MPI_REQUEST_NULL) return MPI_SUCCESS;
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}
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return _MPI_NOT_OK;
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}
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