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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nspr.h"
#include "plgetopt.h"
#include <stdio.h>
#define SEM_NAME1 "/tmp/foo.sem"
#define SEM_NAME2 "/tmp/bar.sem"
#define SEM_MODE 0666
#define ITERATIONS 1000
static PRBool debug_mode = PR_FALSE;
static PRIntn iterations = ITERATIONS;
static PRIntn counter;
static PRSem *sem1, *sem2;
/*
* Thread 2 waits on semaphore 2 and posts to semaphore 1.
*/
void ThreadFunc(void *arg)
{
PRIntn i;
for (i = 0; i < iterations; i++) {
if (PR_WaitSemaphore(sem2) == PR_FAILURE) {
fprintf(stderr, "PR_WaitSemaphore failed\n");
exit(1);
}
if (counter == 2*i+1) {
if (debug_mode) {
printf("thread 2: counter = %d\n", counter);
}
} else {
fprintf(stderr, "thread 2: counter should be %d but is %d\n",
2*i+1, counter);
exit(1);
}
counter++;
if (PR_PostSemaphore(sem1) == PR_FAILURE) {
fprintf(stderr, "PR_PostSemaphore failed\n");
exit(1);
}
}
}
static void Help(void)
{
fprintf(stderr, "sema test program usage:\n");
fprintf(stderr, "\t-d debug mode (FALSE)\n");
fprintf(stderr, "\t-c <count> loop count (%d)\n", ITERATIONS);
fprintf(stderr, "\t-h this message\n");
} /* Help */
int main(int argc, char **argv)
{
PRThread *thred;
PRIntn i;
PLOptStatus os;
PLOptState *opt = PL_CreateOptState(argc, argv, "dc:h");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
if (PL_OPT_BAD == os) {
continue;
}
switch (opt->option) {
case 'd': /* debug mode */
debug_mode = PR_TRUE;
break;
case 'c': /* loop count */
iterations = atoi(opt->value);
break;
case 'h':
default:
Help();
return 2;
}
}
PL_DestroyOptState(opt);
if (PR_DeleteSemaphore(SEM_NAME1) == PR_SUCCESS) {
fprintf(stderr, "warning: removed semaphore %s left over "
"from previous run\n", SEM_NAME1);
}
if (PR_DeleteSemaphore(SEM_NAME2) == PR_SUCCESS) {
fprintf(stderr, "warning: removed semaphore %s left over "
"from previous run\n", SEM_NAME2);
}
sem1 = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 1);
if (NULL == sem1) {
fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
PR_GetError(), PR_GetOSError());
exit(1);
}
sem2 = PR_OpenSemaphore(SEM_NAME2, PR_SEM_CREATE, SEM_MODE, 0);
if (NULL == sem2) {
fprintf(stderr, "PR_OpenSemaphore failed\n");
exit(1);
}
thred = PR_CreateThread(PR_USER_THREAD, ThreadFunc, NULL,
PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
if (NULL == thred) {
fprintf(stderr, "PR_CreateThread failed\n");
exit(1);
}
/*
* Thread 1 waits on semaphore 1 and posts to semaphore 2.
*/
for (i = 0; i < iterations; i++) {
if (PR_WaitSemaphore(sem1) == PR_FAILURE) {
fprintf(stderr, "PR_WaitSemaphore failed\n");
exit(1);
}
if (counter == 2*i) {
if (debug_mode) {
printf("thread 1: counter = %d\n", counter);
}
} else {
fprintf(stderr, "thread 1: counter should be %d but is %d\n",
2*i, counter);
exit(1);
}
counter++;
if (PR_PostSemaphore(sem2) == PR_FAILURE) {
fprintf(stderr, "PR_PostSemaphore failed\n");
exit(1);
}
}
if (PR_JoinThread(thred) == PR_FAILURE) {
fprintf(stderr, "PR_JoinThread failed\n");
exit(1);
}
if (PR_CloseSemaphore(sem1) == PR_FAILURE) {
fprintf(stderr, "PR_CloseSemaphore failed\n");
}
if (PR_CloseSemaphore(sem2) == PR_FAILURE) {
fprintf(stderr, "PR_CloseSemaphore failed\n");
}
if (PR_DeleteSemaphore(SEM_NAME1) == PR_FAILURE) {
fprintf(stderr, "PR_DeleteSemaphore failed\n");
}
if (PR_DeleteSemaphore(SEM_NAME2) == PR_FAILURE) {
fprintf(stderr, "PR_DeleteSemaphore failed\n");
}
printf("PASS\n");
return 0;
}
|
