2 * Copyright (c) 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
35 void (*function)(void);
38 static const struct test tests[];
41 run_lock_and_unlock(void)
43 struct lockfile *lockfile;
45 assert(lockfile_lock("file", 0, &lockfile) == 0);
46 lockfile_unlock(lockfile);
50 run_lock_and_unlock_twice(void)
52 struct lockfile *lockfile;
54 assert(lockfile_lock("file", 0, &lockfile) == 0);
55 lockfile_unlock(lockfile);
57 assert(lockfile_lock("file", 0, &lockfile) == 0);
58 lockfile_unlock(lockfile);
62 run_lock_blocks_same_process(void)
64 struct lockfile *lockfile;
66 assert(lockfile_lock("file", 0, &lockfile) == 0);
67 assert(lockfile_lock("file", 0, &lockfile) == EDEADLK);
68 lockfile_unlock(lockfile);
72 run_lock_blocks_same_process_twice(void)
74 struct lockfile *lockfile;
76 assert(lockfile_lock("file", 0, &lockfile) == 0);
77 assert(lockfile_lock("file", 0, &lockfile) == EDEADLK);
78 assert(lockfile_lock("file", 0, &lockfile) == EDEADLK);
79 lockfile_unlock(lockfile);
82 static enum { PARENT, CHILD }
96 ovs_fatal(errno, "fork failed");
101 run_lock_blocks_other_process(void)
103 /* Making this static prevents a memory leak warning from valgrind for the
104 * parent process, which cannot easily unlock (and free) 'lockfile' because
105 * it can only do so after the child has exited, and it's the caller of
106 * this function that does the wait() call. */
107 static struct lockfile *lockfile;
109 assert(lockfile_lock("file", 0, &lockfile) == 0);
110 if (do_fork() == CHILD) {
111 lockfile_unlock(lockfile);
112 assert(lockfile_lock("file", 0, &lockfile) == EAGAIN);
118 run_lock_twice_blocks_other_process(void)
120 struct lockfile *lockfile, *dummy;
122 assert(lockfile_lock("file", 0, &lockfile) == 0);
123 assert(lockfile_lock("file", 0, &dummy) == EDEADLK);
124 if (do_fork() == CHILD) {
125 assert(lockfile_lock("file", 0, &dummy) == EAGAIN);
131 run_lock_and_unlock_allows_other_process(void)
133 struct lockfile *lockfile;
135 assert(lockfile_lock("file", 0, &lockfile) == 0);
136 lockfile_unlock(lockfile);
138 if (do_fork() == CHILD) {
139 assert(lockfile_lock("file", 0, &lockfile) == 0);
145 run_lock_timeout_gets_the_lock(void)
147 struct lockfile *lockfile;
149 assert(lockfile_lock("file", 0, &lockfile) == 0);
151 if (do_fork() == CHILD) {
152 lockfile_unlock(lockfile);
153 assert(lockfile_lock("file", TIME_UPDATE_INTERVAL * 3,
157 long long int now = time_msec();
158 while (time_msec() < now + TIME_UPDATE_INTERVAL) {
161 lockfile_unlock(lockfile);
166 run_lock_timeout_runs_out(void)
168 struct lockfile *lockfile;
170 assert(lockfile_lock("file", 0, &lockfile) == 0);
172 if (do_fork() == CHILD) {
173 lockfile_unlock(lockfile);
174 assert(lockfile_lock("file", TIME_UPDATE_INTERVAL,
175 &lockfile) == ETIMEDOUT);
178 long long int now = time_msec();
179 while (time_msec() < now + TIME_UPDATE_INTERVAL * 3) {
182 lockfile_unlock(lockfile);
187 run_lock_multiple(void)
189 struct lockfile *a, *b, *c, *dummy;
191 assert(lockfile_lock("a", 0, &a) == 0);
192 assert(lockfile_lock("b", 0, &b) == 0);
193 assert(lockfile_lock("c", 0, &c) == 0);
196 assert(lockfile_lock("a", 0, &a) == 0);
197 assert(lockfile_lock("a", 0, &dummy) == EDEADLK);
201 assert(lockfile_lock("a", 0, &a) == 0);
212 printf("usage: %s TESTNAME\n"
213 "where TESTNAME is one of the following:\n",
215 for (i = 0; tests[i].name; i++) {
216 fprintf(stderr, "\t%s\n", tests[i].name);
220 static const struct test tests[] = {
221 #define TEST(NAME) { #NAME, run_##NAME }
222 TEST(lock_and_unlock),
223 TEST(lock_and_unlock_twice),
224 TEST(lock_blocks_same_process),
225 TEST(lock_blocks_same_process_twice),
226 TEST(lock_blocks_other_process),
227 TEST(lock_twice_blocks_other_process),
228 TEST(lock_and_unlock_allows_other_process),
229 TEST(lock_timeout_gets_the_lock),
230 TEST(lock_timeout_runs_out),
238 main(int argc, char *argv[])
242 set_program_name(argv[0]);
246 ovs_fatal(0, "exactly one argument required; use \"%s help\" for help",
251 for (i = 0; tests[i].name; i++) {
252 if (!strcmp(argv[1], tests[i].name)) {
256 (tests[i].function)();
259 while (wait(&status) > 0) {
260 if (WIFEXITED(status) && WEXITSTATUS(status) == 11) {
263 ovs_fatal(0, "child exited in unexpected way: %s",
264 process_status_msg(status));
267 if (errno != ECHILD) {
268 ovs_fatal(errno, "wait");
271 printf("%s: success (%d child%s)\n",
272 tests[i].name, n_children, n_children != 1 ? "ren" : "");
276 ovs_fatal(0, "unknown test \"%s\"; use \"%s help\" for help",
277 argv[1], program_name);