1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2021 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2008 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) 2006-2010 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/request/request.h"
#include "ompi/request/grequest.h"
#include "ompi/memchecker.h"
#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Request_get_status = PMPI_Request_get_status
#endif
#define MPI_Request_get_status PMPI_Request_get_status
#endif
static const char FUNC_NAME[] = "MPI_Request_get_status";
/* Non blocking test for the request status. Upon completion, the request will
* not be freed (unlike the test function). A subsequent call to test, wait
* or free should be executed on the request.
*/
int MPI_Request_get_status(MPI_Request request, int *flag,
MPI_Status *status)
{
#if OPAL_ENABLE_PROGRESS_THREADS == 0
int do_it_once = 0;
#endif
MEMCHECKER(
memchecker_request(&request);
);
if( MPI_PARAM_CHECK ) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if( (NULL == flag) ) {
return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_ARG, FUNC_NAME);
} else if (NULL == request) {
return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_REQUEST,
FUNC_NAME);
}
}
#if OPAL_ENABLE_PROGRESS_THREADS == 0
recheck_request_status:
#endif
opal_atomic_mb();
if( (request == MPI_REQUEST_NULL) || (request->req_state == OMPI_REQUEST_INACTIVE) ) {
*flag = true;
if( MPI_STATUS_IGNORE != status ) {
OMPI_COPY_STATUS(status, ompi_status_empty, false);
}
return MPI_SUCCESS;
}
if( request->req_complete ) {
*flag = true;
/* If this is a generalized request, we *always* have to call
the query function to get the status (MPI-2:8.2), even if
the user passed STATUS_IGNORE. */
if (OMPI_REQUEST_GEN == request->req_type) {
ompi_grequest_invoke_query(request, &request->req_status);
}
if (MPI_STATUS_IGNORE != status) {
OMPI_COPY_STATUS(status, request->req_status, false);
}
return MPI_SUCCESS;
}
#if OPAL_ENABLE_PROGRESS_THREADS == 0
if( 0 == do_it_once ) {
/* If we run the opal_progress then check the status of the
request before leaving. We will call the opal_progress only
once per call. */
opal_progress();
do_it_once++;
goto recheck_request_status;
}
#endif
*flag = false;
return MPI_SUCCESS;
}
|
