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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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;
}
|
