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/*
* 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.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "opal/class/opal_object.h"
#include "ompi/request/request.h"
#include "ompi/constants.h"
ompi_pointer_array_t ompi_request_f_to_c_table;
OMPI_DECLSPEC size_t ompi_request_waiting = 0;
OMPI_DECLSPEC size_t ompi_request_completed = 0;
OMPI_DECLSPEC opal_mutex_t ompi_request_lock;
OMPI_DECLSPEC opal_condition_t ompi_request_cond;
OMPI_DECLSPEC ompi_request_t ompi_request_null;
OMPI_DECLSPEC ompi_request_t ompi_request_empty;
ompi_status_public_t ompi_status_empty;
static void ompi_request_construct(ompi_request_t* req)
{
OMPI_REQUEST_INIT(req, false);
req->req_free = NULL;
req->req_cancel = NULL;
req->req_f_to_c_index = MPI_UNDEFINED;
}
static void ompi_request_destruct(ompi_request_t* req)
{
assert( MPI_UNDEFINED == req->req_f_to_c_index );
assert( OMPI_REQUEST_INVALID == req->req_state );
}
static int ompi_request_null_free(ompi_request_t** request)
{
return OMPI_SUCCESS;
}
static int ompi_request_null_cancel(ompi_request_t* request, int flag)
{
return OMPI_SUCCESS;
}
static int ompi_request_empty_free(ompi_request_t** request)
{
*request = &ompi_request_null;
return OMPI_SUCCESS;
}
OBJ_CLASS_INSTANCE(
ompi_request_t,
ompi_free_list_item_t,
ompi_request_construct,
ompi_request_destruct);
int ompi_request_init(void)
{
OBJ_CONSTRUCT(&ompi_request_f_to_c_table, ompi_pointer_array_t);
OBJ_CONSTRUCT(&ompi_request_lock, opal_mutex_t);
OBJ_CONSTRUCT(&ompi_request_cond, opal_condition_t);
OBJ_CONSTRUCT(&ompi_request_null, ompi_request_t);
OBJ_CONSTRUCT(&ompi_request_empty, ompi_request_t);
ompi_request_null.req_status.MPI_SOURCE = MPI_PROC_NULL;
ompi_request_null.req_status.MPI_TAG = MPI_ANY_TAG;
ompi_request_null.req_status.MPI_ERROR = MPI_SUCCESS;
ompi_request_null.req_status._count = 0;
ompi_request_null.req_status._cancelled = 0;
ompi_request_null.req_state = OMPI_REQUEST_INACTIVE;
ompi_request_null.req_complete = true;
ompi_request_null.req_type = OMPI_REQUEST_NULL;
ompi_request_null.req_free = ompi_request_null_free;
ompi_request_null.req_cancel = ompi_request_null_cancel;
ompi_request_null.req_f_to_c_index =
ompi_pointer_array_add(&ompi_request_f_to_c_table, &ompi_request_null);
if (0 != ompi_request_null.req_f_to_c_index) {
return OMPI_ERR_REQUEST;
}
/* We need a way to distinguish between the user provided
* MPI_REQUEST_NULL to MPI_Wait* and a non-active (MPI_PROC_NULL)
* request passed to any P2P non-blocking function.
*
* The main difference to ompi_request_null is
* req_state being OMPI_REQUEST_ACTIVE, so that MPI_Waitall
* does not set the status to ompi_status_empty and the different
* req_free function, which resets the
* request to MPI_REQUEST_NULL.
* The req_cancel function need not be changed.
*/
ompi_request_empty.req_status.MPI_SOURCE = MPI_PROC_NULL;
ompi_request_empty.req_status.MPI_TAG = MPI_ANY_TAG;
ompi_request_empty.req_status.MPI_ERROR = MPI_SUCCESS;
ompi_request_empty.req_status._count = 0;
ompi_request_empty.req_status._cancelled = 0;
ompi_request_empty.req_state = OMPI_REQUEST_ACTIVE;
ompi_request_empty.req_complete = true;
ompi_request_empty.req_type = OMPI_REQUEST_NULL;
ompi_request_empty.req_free = ompi_request_empty_free;
ompi_request_empty.req_cancel = ompi_request_null_cancel;
ompi_request_empty.req_f_to_c_index =
ompi_pointer_array_add(&ompi_request_f_to_c_table, &ompi_request_empty);
if (1 != ompi_request_empty.req_f_to_c_index) {
return OMPI_ERR_REQUEST;
}
ompi_status_empty.MPI_SOURCE = MPI_ANY_SOURCE;
ompi_status_empty.MPI_TAG = MPI_ANY_TAG;
ompi_status_empty.MPI_ERROR = MPI_SUCCESS;
ompi_status_empty._count = 0;
ompi_status_empty._cancelled = 0;
return OMPI_SUCCESS;
}
int ompi_request_finalize(void)
{
OMPI_REQUEST_FINI( &ompi_request_null );
OBJ_DESTRUCT( &ompi_request_null );
OMPI_REQUEST_FINI( &ompi_request_empty );
OBJ_DESTRUCT( &ompi_request_empty );
OBJ_DESTRUCT( &ompi_request_cond );
OBJ_DESTRUCT( &ompi_request_lock );
OBJ_DESTRUCT( &ompi_request_f_to_c_table );
return OMPI_SUCCESS;
}
int ompi_request_complete(ompi_request_t* request)
{
OPAL_THREAD_LOCK(&ompi_request_lock);
ompi_request_completed++;
request->req_complete = true;
if(ompi_request_waiting)
opal_condition_signal(&ompi_request_cond);
OPAL_THREAD_UNLOCK(&ompi_request_lock);
return OMPI_SUCCESS;
}
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