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_settime() uses an absolute clock if TIMER_ABSTIME is 9 * set in flags. 10 * 11 * Uses the same steps as 1-1.c to determine how long the timer lasted. 12 * In order to use an absolute clock, the timer time is determined by: 13 * - Get current time. 14 * - Set the timer to TIMERSEC+current time. 15 * - After the timer goes off, ensure that the timer went off within 16 * ACCEPTABLEDELTA of TIMERSEC seconds. 17 * 18 * For this test, signal SIGTOTEST will be used, clock CLOCK_REALTIME 19 * will be used. 20 */ 21 22#include <time.h> 23#include <signal.h> 24#include <stdio.h> 25#include <unistd.h> 26#include <stdlib.h> 27#include "posixtest.h" 28 29#define SIGTOTEST SIGALRM 30#define TIMERSEC 2 31#define SLEEPDELTA 3 32#define ACCEPTABLEDELTA 1 33 34void handler(int signo) 35{ 36 printf("Caught signal\n"); 37} 38 39int main(void) 40{ 41 struct sigevent ev; 42 struct sigaction act; 43 timer_t tid; 44 struct itimerspec its; 45 struct timespec beforets, ts, tsleft; 46 int flags = 0; 47 48 ev.sigev_notify = SIGEV_SIGNAL; 49 ev.sigev_signo = SIGTOTEST; 50 51 act.sa_handler = handler; 52 act.sa_flags = 0; 53 54 if (sigemptyset(&act.sa_mask) == -1) { 55 perror("Error calling sigemptyset\n"); 56 return PTS_UNRESOLVED; 57 } 58 if (sigaction(SIGTOTEST, &act, 0) == -1) { 59 perror("Error calling sigaction\n"); 60 return PTS_UNRESOLVED; 61 } 62 63 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) { 64 perror("timer_create() did not return success\n"); 65 return PTS_UNRESOLVED; 66 } 67 68 if (clock_gettime(CLOCK_REALTIME, &beforets) != 0) { 69 perror("clock_gettime() did not return success\n"); 70 return PTS_UNRESOLVED; 71 } 72 73 its.it_interval.tv_sec = 0; 74 its.it_interval.tv_nsec = 0; 75 its.it_value.tv_sec = beforets.tv_sec + TIMERSEC; 76 its.it_value.tv_nsec = beforets.tv_nsec; 77 78 ts.tv_sec = TIMERSEC + SLEEPDELTA; 79 ts.tv_nsec = 0; 80 81 flags |= TIMER_ABSTIME; 82 if (timer_settime(tid, flags, &its, NULL) != 0) { 83 perror("timer_settime() did not return success\n"); 84 return PTS_UNRESOLVED; 85 } 86 87 if (nanosleep(&ts, &tsleft) != -1) { 88 perror("nanosleep() not interrupted\n"); 89 return PTS_FAIL; 90 } 91 92 if (abs(tsleft.tv_sec - SLEEPDELTA) <= ACCEPTABLEDELTA) { 93 printf("Test PASSED\n"); 94 return PTS_PASS; 95 } 96 97 printf("Timer did not last for correct amount of time\n"); 98 printf("timer: %d != correct %d\n", 99 (int)ts.tv_sec - (int)tsleft.tv_sec, TIMERSEC); 100 return PTS_FAIL; 101} 102