612570134f
to let the PML (or io, more generally the low level request manager)
to have it's own release function (what was before the req_fini). This
function will only be called from the low level while the req_free will
be called from the upper level (MPI layer) in order to mark the request
as not used by the user anymore.
From the request point of view the requests will be marked as inactive
everytime we read their status (true for persistent as well). As
MPI_REQUEST_NULL is already marked as inactive, the test and wait functions
are simpler. The drawback is that now we have to change in the
ompi_request_{test|wait} the req_status of the request once we get it's
status.
This commit was SVN r9290.
162 строки
5.2 KiB
C
162 строки
5.2 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "opal/class/opal_object.h"
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#include "ompi/request/request.h"
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#include "ompi/constants.h"
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ompi_pointer_array_t ompi_request_f_to_c_table;
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OMPI_DECLSPEC size_t ompi_request_waiting = 0;
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OMPI_DECLSPEC size_t ompi_request_completed = 0;
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OMPI_DECLSPEC opal_mutex_t ompi_request_lock;
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OMPI_DECLSPEC opal_condition_t ompi_request_cond;
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OMPI_DECLSPEC ompi_request_t ompi_request_null;
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OMPI_DECLSPEC ompi_request_t ompi_request_empty;
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ompi_status_public_t ompi_status_empty;
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static void ompi_request_construct(ompi_request_t* req)
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{
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OMPI_REQUEST_INIT(req, false);
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req->req_free = NULL;
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req->req_cancel = NULL;
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req->req_f_to_c_index = MPI_UNDEFINED;
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}
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static void ompi_request_destruct(ompi_request_t* req)
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{
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assert( MPI_UNDEFINED == req->req_f_to_c_index );
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assert( OMPI_REQUEST_INVALID == req->req_state );
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}
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static int ompi_request_null_free(ompi_request_t** request)
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{
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return OMPI_SUCCESS;
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}
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static int ompi_request_null_cancel(ompi_request_t* request, int flag)
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{
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return OMPI_SUCCESS;
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}
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static int ompi_request_empty_free(ompi_request_t** request)
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{
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*request = &ompi_request_null;
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return OMPI_SUCCESS;
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}
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OBJ_CLASS_INSTANCE(
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ompi_request_t,
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opal_list_item_t,
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ompi_request_construct,
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ompi_request_destruct);
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int ompi_request_init(void)
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{
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OBJ_CONSTRUCT(&ompi_request_f_to_c_table, ompi_pointer_array_t);
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OBJ_CONSTRUCT(&ompi_request_lock, opal_mutex_t);
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OBJ_CONSTRUCT(&ompi_request_cond, opal_condition_t);
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OBJ_CONSTRUCT(&ompi_request_null, ompi_request_t);
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OBJ_CONSTRUCT(&ompi_request_empty, ompi_request_t);
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ompi_request_null.req_status.MPI_SOURCE = MPI_PROC_NULL;
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ompi_request_null.req_status.MPI_TAG = MPI_ANY_TAG;
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ompi_request_null.req_status.MPI_ERROR = MPI_SUCCESS;
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ompi_request_null.req_status._count = 0;
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ompi_request_null.req_status._cancelled = 0;
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ompi_request_null.req_state = OMPI_REQUEST_INACTIVE;
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ompi_request_null.req_complete = true;
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ompi_request_null.req_type = OMPI_REQUEST_NULL;
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ompi_request_null.req_free = ompi_request_null_free;
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ompi_request_null.req_cancel = ompi_request_null_cancel;
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ompi_request_null.req_f_to_c_index =
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ompi_pointer_array_add(&ompi_request_f_to_c_table, &ompi_request_null);
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if (0 != ompi_request_null.req_f_to_c_index) {
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return OMPI_ERR_REQUEST;
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}
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/* We need a way to distinguish between the user provided
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* MPI_REQUEST_NULL to MPI_Wait* and a non-active (MPI_PROC_NULL)
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* request passed to any P2P non-blocking function.
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*
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* The main difference to ompi_request_null is
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* req_state being OMPI_REQUEST_ACTIVE, so that MPI_Waitall
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* does not set the status to ompi_status_empty and the different
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* req_free function, which resets the
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* request to MPI_REQUEST_NULL.
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* The req_cancel function need not be changed.
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*/
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ompi_request_empty.req_status.MPI_SOURCE = MPI_PROC_NULL;
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ompi_request_empty.req_status.MPI_TAG = MPI_ANY_TAG;
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ompi_request_empty.req_status.MPI_ERROR = MPI_SUCCESS;
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ompi_request_empty.req_status._count = 0;
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ompi_request_empty.req_status._cancelled = 0;
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ompi_request_empty.req_state = OMPI_REQUEST_ACTIVE;
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ompi_request_empty.req_complete = true;
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ompi_request_empty.req_type = OMPI_REQUEST_NULL;
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ompi_request_empty.req_free = ompi_request_empty_free;
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ompi_request_empty.req_cancel = ompi_request_null_cancel;
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ompi_request_empty.req_f_to_c_index =
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ompi_pointer_array_add(&ompi_request_f_to_c_table, &ompi_request_empty);
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if (1 != ompi_request_empty.req_f_to_c_index) {
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return OMPI_ERR_REQUEST;
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}
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ompi_status_empty.MPI_SOURCE = MPI_ANY_SOURCE;
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ompi_status_empty.MPI_TAG = MPI_ANY_TAG;
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ompi_status_empty.MPI_ERROR = MPI_SUCCESS;
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ompi_status_empty._count = 0;
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ompi_status_empty._cancelled = 0;
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return OMPI_SUCCESS;
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}
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int ompi_request_finalize(void)
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{
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OMPI_REQUEST_FINI( &ompi_request_null );
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OBJ_DESTRUCT( &ompi_request_null );
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OMPI_REQUEST_FINI( &ompi_request_empty );
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OBJ_DESTRUCT( &ompi_request_empty );
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OBJ_DESTRUCT( &ompi_request_cond );
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OBJ_DESTRUCT( &ompi_request_lock );
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OBJ_DESTRUCT( &ompi_request_f_to_c_table );
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return OMPI_SUCCESS;
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}
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int ompi_request_complete(ompi_request_t* request)
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{
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OPAL_THREAD_LOCK(&ompi_request_lock);
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ompi_request_completed++;
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request->req_complete = true;
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if(ompi_request_waiting)
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opal_condition_signal(&ompi_request_cond);
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OPAL_THREAD_UNLOCK(&ompi_request_lock);
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return OMPI_SUCCESS;
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}
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