1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include "nspr.h"
7 #include "plgetopt.h"
8
9 #include <stdio.h>
10
11 #ifdef DEBUG
12 #define SEM_D "D"
13 #else
14 #define SEM_D
15 #endif
16 #ifdef IS_64
17 #define SEM_64 "64"
18 #else
19 #define SEM_64
20 #endif
21
22 #define SHM_NAME "/tmp/counter" SEM_D SEM_64
23 #define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
24 #define SEM_NAME2 "/tmp/bar.sem" SEM_D SEM_64
25 #define EXE_NAME "semapong"
26 #define SEM_MODE 0666
27 #define SHM_MODE 0666
28 #define ITERATIONS 1000
29
30 static PRBool debug_mode = PR_FALSE;
31 static PRIntn iterations = ITERATIONS;
32 static PRSem *sem1, *sem2;
33
Help(void)34 static void Help(void)
35 {
36 fprintf(stderr, "semaping test program usage:\n");
37 fprintf(stderr, "\t-d debug mode (FALSE)\n");
38 fprintf(stderr, "\t-c <count> loop count (%d)\n", ITERATIONS);
39 fprintf(stderr, "\t-h this message\n");
40 } /* Help */
41
main(int argc,char ** argv)42 int main(int argc, char **argv)
43 {
44 PRProcess *proc;
45 PRIntn i;
46 char *child_argv[32];
47 char **child_arg;
48 char iterations_buf[32];
49 PRSharedMemory *shm;
50 PRIntn *counter_addr;
51 PRInt32 exit_code;
52 PLOptStatus os;
53 PLOptState *opt = PL_CreateOptState(argc, argv, "dc:h");
54
55 while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
56 if (PL_OPT_BAD == os) {
57 continue;
58 }
59 switch (opt->option) {
60 case 'd': /* debug mode */
61 debug_mode = PR_TRUE;
62 break;
63 case 'c': /* loop count */
64 iterations = atoi(opt->value);
65 break;
66 case 'h':
67 default:
68 Help();
69 return 2;
70 }
71 }
72 PL_DestroyOptState(opt);
73
74 if (PR_DeleteSharedMemory(SHM_NAME) == PR_SUCCESS) {
75 fprintf(stderr, "warning: removed shared memory %s left over "
76 "from previous run\n", SHM_NAME);
77 }
78 if (PR_DeleteSemaphore(SEM_NAME1) == PR_SUCCESS) {
79 fprintf(stderr, "warning: removed semaphore %s left over "
80 "from previous run\n", SEM_NAME1);
81 }
82 if (PR_DeleteSemaphore(SEM_NAME2) == PR_SUCCESS) {
83 fprintf(stderr, "warning: removed semaphore %s left over "
84 "from previous run\n", SEM_NAME2);
85 }
86
87 shm = PR_OpenSharedMemory(SHM_NAME, sizeof(*counter_addr), PR_SHM_CREATE, SHM_MODE);
88 if (NULL == shm) {
89 fprintf(stderr, "PR_OpenSharedMemory failed (%d, %d)\n",
90 PR_GetError(), PR_GetOSError());
91 exit(1);
92 }
93 counter_addr = PR_AttachSharedMemory(shm, 0);
94 if (NULL == counter_addr) {
95 fprintf(stderr, "PR_AttachSharedMemory failed\n");
96 exit(1);
97 }
98 *counter_addr = 0;
99 sem1 = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 1);
100 if (NULL == sem1) {
101 fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
102 PR_GetError(), PR_GetOSError());
103 exit(1);
104 }
105 sem2 = PR_OpenSemaphore(SEM_NAME2, PR_SEM_CREATE, SEM_MODE, 0);
106 if (NULL == sem2) {
107 fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
108 PR_GetError(), PR_GetOSError());
109 exit(1);
110 }
111
112 child_arg = &child_argv[0];
113 *child_arg++ = EXE_NAME;
114 if (debug_mode != PR_FALSE) {
115 *child_arg++ = "-d";
116 }
117 if (iterations != ITERATIONS) {
118 *child_arg++ = "-c";
119 PR_snprintf(iterations_buf, sizeof(iterations_buf), "%d", iterations);
120 *child_arg++ = iterations_buf;
121 }
122 *child_arg = NULL;
123 proc = PR_CreateProcess(child_argv[0], child_argv, NULL, NULL);
124 if (NULL == proc) {
125 fprintf(stderr, "PR_CreateProcess failed\n");
126 exit(1);
127 }
128
129 /*
130 * Process 1 waits on semaphore 1 and posts to semaphore 2.
131 */
132 for (i = 0; i < iterations; i++) {
133 if (PR_WaitSemaphore(sem1) == PR_FAILURE) {
134 fprintf(stderr, "PR_WaitSemaphore failed\n");
135 exit(1);
136 }
137 if (*counter_addr == 2*i) {
138 if (debug_mode) {
139 printf("process 1: counter = %d\n", *counter_addr);
140 }
141 } else {
142 fprintf(stderr, "process 1: counter should be %d but is %d\n",
143 2*i, *counter_addr);
144 exit(1);
145 }
146 (*counter_addr)++;
147 if (PR_PostSemaphore(sem2) == PR_FAILURE) {
148 fprintf(stderr, "PR_PostSemaphore failed\n");
149 exit(1);
150 }
151 }
152 if (PR_DetachSharedMemory(shm, counter_addr) == PR_FAILURE) {
153 fprintf(stderr, "PR_DetachSharedMemory failed\n");
154 exit(1);
155 }
156 if (PR_CloseSharedMemory(shm) == PR_FAILURE) {
157 fprintf(stderr, "PR_CloseSharedMemory failed\n");
158 exit(1);
159 }
160 if (PR_CloseSemaphore(sem1) == PR_FAILURE) {
161 fprintf(stderr, "PR_CloseSemaphore failed\n");
162 }
163 if (PR_CloseSemaphore(sem2) == PR_FAILURE) {
164 fprintf(stderr, "PR_CloseSemaphore failed\n");
165 }
166
167 if (PR_WaitProcess(proc, &exit_code) == PR_FAILURE) {
168 fprintf(stderr, "PR_WaitProcess failed\n");
169 exit(1);
170 }
171 if (exit_code != 0) {
172 fprintf(stderr, "process 2 failed with exit code %d\n", exit_code);
173 exit(1);
174 }
175
176 if (PR_DeleteSharedMemory(SHM_NAME) == PR_FAILURE) {
177 fprintf(stderr, "PR_DeleteSharedMemory failed\n");
178 }
179 if (PR_DeleteSemaphore(SEM_NAME1) == PR_FAILURE) {
180 fprintf(stderr, "PR_DeleteSemaphore failed\n");
181 }
182 if (PR_DeleteSemaphore(SEM_NAME2) == PR_FAILURE) {
183 fprintf(stderr, "PR_DeleteSemaphore failed\n");
184 }
185 printf("PASS\n");
186 return 0;
187 }
188