2 * Copyright (c) 2009 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.
24 #include <sys/types.h>
34 gettimeofday_in_msec(void)
38 assert(!gettimeofday(&tv, NULL));
39 return timeval_to_msec(&tv);
45 /* Wait until we are awakened by a signal (typically EINTR due to the
46 * setitimer()). Then ensure that, if time has really advanced by
47 * TIME_UPDATE_INTERVAL, then time_msec() reports that it advanced.
49 long long int start_time_msec;
50 long long int start_gtod;
52 start_time_msec = time_msec();
53 start_gtod = gettimeofday_in_msec();
55 /* Wait up to 1 second. Using select() to do the timeout avoids
56 * interfering with the interval timer. */
57 struct timeval timeout;
60 assert(select(0, NULL, NULL, NULL, &timeout) == -1 && errno == EINTR);
62 if (gettimeofday_in_msec() - start_gtod >= TIME_UPDATE_INTERVAL) {
63 assert(time_msec() - start_time_msec >= TIME_UPDATE_INTERVAL);
72 ovs_fatal(0, "usage: %s TEST, where TEST is \"plain\" or \"daemon\"",
77 main(int argc, char *argv[])
79 set_program_name(argv[0]);
84 } else if (!strcmp(argv[1], "plain")) {
86 } else if (!strcmp(argv[1], "daemon")) {
87 /* Test that time still advances even in a daemon. This is an
88 * interesting test because fork() cancels the interval timer. */
92 assert(getcwd(cwd, sizeof cwd) == cwd);
94 unlink("test-timeval.success");
96 /* Daemonize, with a pidfile in the current directory. */
98 set_pidfile(xasprintf("%s/test-timeval.pid", cwd));
105 /* Report success by writing out a file, since the ultimate invoker of
106 * test-timeval can't wait on the daemonized process. */
107 success = fopen("test-timeval.success", "w");
109 ovs_fatal(errno, "test-timeval.success: create failed");
111 fprintf(success, "success\n");