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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
#include "mpitestconf.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
/*
static char MTEST_Descrip[] = "Test reading and writing zero bytes (set status correctly)";
*/
int main(int argc, char *argv[])
{
int errs = 0;
int size, rank, i, *buf, count, rc;
MPI_File fh;
MPI_Comm comm;
MPI_Status status;
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
rc = MPI_File_open(comm, (char *) "test.ord",
MPI_MODE_RDWR | MPI_MODE_CREATE |
MPI_MODE_DELETE_ON_CLOSE, MPI_INFO_NULL, &fh);
if (rc) {
MTestPrintErrorMsg("File_open", rc);
errs++;
/* If the open fails, there isn't anything else that we can do */
goto fn_fail;
}
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
buf = (int *) malloc(size * sizeof(int));
buf[0] = rank;
/* Write to file */
rc = MPI_File_write_ordered(fh, buf, 1, MPI_INT, &status);
if (rc) {
MTestPrintErrorMsg("File_write_ordered", rc);
errs++;
} else {
MPI_Get_count(&status, MPI_INT, &count);
if (count != 1) {
errs++;
fprintf(stderr, "Wrong count (%d) on write-ordered\n", count);
}
}
/* Set the individual pointer to 0, since we want to use a read_all */
MPI_File_seek(fh, 0, MPI_SEEK_SET);
/* Read nothing (check status) */
memset(&status, 0xff, sizeof(MPI_Status));
MPI_File_read(fh, buf, 0, MPI_INT, &status);
MPI_Get_count(&status, MPI_INT, &count);
if (count != 0) {
errs++;
fprintf(stderr, "Count not zero (%d) on read\n", count);
}
/* Write nothing (check status) */
memset(&status, 0xff, sizeof(MPI_Status));
MPI_File_write(fh, buf, 0, MPI_INT, &status);
if (count != 0) {
errs++;
fprintf(stderr, "Count not zero (%d) on write\n", count);
}
/* Read shared nothing (check status) */
MPI_File_seek_shared(fh, 0, MPI_SEEK_SET);
/* Read nothing (check status) */
memset(&status, 0xff, sizeof(MPI_Status));
MPI_File_read_shared(fh, buf, 0, MPI_INT, &status);
MPI_Get_count(&status, MPI_INT, &count);
if (count != 0) {
errs++;
fprintf(stderr, "Count not zero (%d) on read shared\n", count);
}
/* Write nothing (check status) */
memset(&status, 0xff, sizeof(MPI_Status));
MPI_File_write_shared(fh, buf, 0, MPI_INT, &status);
if (count != 0) {
errs++;
fprintf(stderr, "Count not zero (%d) on write\n", count);
}
MPI_Barrier(comm);
MPI_File_seek_shared(fh, 0, MPI_SEEK_SET);
for (i = 0; i < size; i++)
buf[i] = -1;
MPI_File_read_ordered(fh, buf, 1, MPI_INT, &status);
if (buf[0] != rank) {
errs++;
fprintf(stderr, "%d: buf = %d\n", rank, buf[0]);
}
free(buf);
MPI_File_close(&fh);
fn_fail:
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
|
