| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| * |
| * Test that timer_getoverrun() returns the number of overruns that |
| * have happened due to signals being sent from a timer. Test with |
| * timer seconds in nanoseconds. |
| * |
| * INTERVALNSEC = clock resolution |
| * |
| * Steps (testing with just one overrun): |
| * - Block signal SIGCONT (SIGCONT used so test will not terminate) |
| * - Set up a timer to send SIGCONT on expiration with an interval |
| * of INTERVALNSEC nanoseconds. |
| * - Wait for that timer to expire EXPECTEDIVERRUNS+1 times (wait VALUENSEC + |
| * (EXPECTEDIVERRUNS)*INTERVALNSEC). |
| * - Call timer_getoverrun() and ensure EXPECTEDOVERRUNS was returned. |
| * [First signal made it. All others were overruns.] |
| */ |
| |
| #include <signal.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include "posixtest.h" |
| |
| #define VALUENSEC 2000000 |
| |
| #define EXPECTEDOVERRUNS 75 |
| |
| int main() |
| { |
| sigset_t set; |
| struct sigevent ev; |
| timer_t tid; |
| struct itimerspec its; |
| struct timespec ts, tsres; |
| int overruns; |
| |
| if (sigemptyset(&set) != 0) { |
| perror("sigemptyset() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (sigaddset(&set, SIGCONT) != 0) { |
| perror("sigaddset() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (sigprocmask(SIG_SETMASK, &set, NULL) != 0) { |
| perror("sigprocmask() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| ev.sigev_notify = SIGEV_SIGNAL; |
| ev.sigev_signo = SIGCONT; |
| |
| /* |
| * create first timer |
| */ |
| if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) { |
| perror("timer_create() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (clock_getres(CLOCK_REALTIME, &tsres) != 0) { |
| perror("clock_gettime() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (tsres.tv_sec != 0) { |
| printf("Clock resolution in seconds, not nsecs. Exiting.\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| its.it_interval.tv_sec = 0; |
| its.it_interval.tv_nsec = tsres.tv_nsec; |
| its.it_value.tv_sec = 0; |
| its.it_value.tv_nsec = VALUENSEC; |
| |
| if (timer_settime(tid, 0, &its, NULL) != 0) { |
| perror("timer_settime() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| ts.tv_nsec = VALUENSEC + ((EXPECTEDOVERRUNS) * its.it_interval.tv_nsec); |
| ts.tv_sec = 0; |
| if (nanosleep(&ts, NULL) != 0) { |
| perror("nanosleep() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (sigprocmask(SIG_UNBLOCK, &set, NULL) != 0) { |
| perror("sigprocmask() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| overruns = timer_getoverrun(tid); |
| if (overruns > EXPECTEDOVERRUNS - 5) { |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } else { |
| printf("FAIL: %d overruns sent; expected %d\n", |
| overruns, EXPECTEDOVERRUNS); |
| return PTS_FAIL; |
| } |
| } |