1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com 4 * This file is licensed under the GPL license. For the full content 5 * of this license, see the COPYING file at the top level of this 6 * source tree. 7 8 * Test that timer_gettime() returns a relative amount even on 9 * absolute timers. 10 * - Create and arm an absolute timer. 11 * - Call timer_gettime() 12 * - Ensure the value returned is within ACCEPTABLEDELTA less than 13 * the TIMERSEC. If it is, the values returned were indeed relative. 14 * 15 * Signal SIGCONT will be used so that it will not affect the test if 16 * the timer expires. 17 * Clock CLOCK_REALTIME will be used. 18 */ 19 20 #include <time.h> 21 #include <signal.h> 22 #include <stdio.h> 23 #include <unistd.h> 24 #include <stdlib.h> 25 #include "posixtest.h" 26 27 #define TIMERSEC 2 28 #define SLEEPDELTA 3 29 #define ACCEPTABLEDELTA 1 30 31 int main(void) 32 { 33 struct sigevent ev; 34 timer_t tid; 35 struct itimerspec itsset, itsget; 36 struct timespec ts; 37 int flags = 0; 38 int delta; 39 40 ev.sigev_notify = SIGEV_SIGNAL; 41 ev.sigev_signo = SIGCONT; 42 43 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) { 44 perror("timer_create() did not return success\n"); 45 return PTS_UNRESOLVED; 46 } 47 48 if (clock_gettime(CLOCK_REALTIME, &ts) != 0) { 49 perror("clock_gettime() did not return success\n"); 50 return PTS_UNRESOLVED; 51 } 52 53 itsset.it_interval.tv_sec = 0; 54 itsset.it_interval.tv_nsec = 0; 55 itsset.it_value.tv_sec = ts.tv_sec + TIMERSEC; 56 itsset.it_value.tv_nsec = ts.tv_nsec; 57 58 flags |= TIMER_ABSTIME; 59 if (timer_settime(tid, flags, &itsset, NULL) != 0) { 60 perror("timer_settime() did not return success\n"); 61 return PTS_UNRESOLVED; 62 } 63 64 if (timer_gettime(tid, &itsget) != 0) { 65 perror("timer_gettime() did not return success\n"); 66 return PTS_UNRESOLVED; 67 } 68 69 delta = TIMERSEC - itsget.it_value.tv_sec; 70 71 if (delta < 0) { 72 printf("FAIL: timer_gettime() value > timer_settime()\n"); 73 printf("%d > %d\n", (int)itsget.it_value.tv_sec, 74 (int)itsset.it_value.tv_sec); 75 return PTS_FAIL; 76 } 77 78 if (delta <= ACCEPTABLEDELTA) { 79 printf("Test PASSED\n"); 80 return PTS_PASS; 81 } 82 83 printf("FAIL: timer_gettime() value !~= timer_settime()\n"); 84 printf("%d !~= %d\n", (int)itsget.it_value.tv_sec, 85 (int)itsset.it_value.tv_sec); 86 return PTS_FAIL; 87 } 88
