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 nanosleep() causes the current thread to be suspended 9 * until _at least_ the time interval in rqtp passes. 10 * Test for a variety of time intervals (in nsecs) 11 */ 12 #include <stdio.h> 13 #include <time.h> 14 #include "posixtest.h" 15 16 #define NUMINTERVALS 13 17 int main(void) 18 { 19 struct timespec tssleepfor, tsstorage, tsbefore, tsafter; 20 int sleepnsec[NUMINTERVALS] = { 1, 2, 10, 100, 1000, 10000, 1000000, 21 10000000, 100000000, 200000000, 500000000, 750000000, 22 999999900 23 }; 24 int i; 25 int failure = 0; 26 int slepts, sleptns; 27 28 if (clock_gettime(CLOCK_REALTIME, &tsbefore) == -1) { 29 perror("Error in clock_gettime()\n"); 30 return PTS_UNRESOLVED; 31 } 32 33 tssleepfor.tv_sec = 0; 34 for (i = 0; i < NUMINTERVALS; i++) { 35 tssleepfor.tv_nsec = sleepnsec[i]; 36 if (nanosleep(&tssleepfor, &tsstorage) != 0) { 37 printf("nanosleep() did not return success\n"); 38 return PTS_UNRESOLVED; 39 } 40 41 if (clock_gettime(CLOCK_REALTIME, &tsafter) == -1) { 42 perror("Error in clock_gettime()\n"); 43 return PTS_UNRESOLVED; 44 } 45 46 /* 47 * Generic alg for calculating slept time. 48 */ 49 slepts = tsafter.tv_sec - tsbefore.tv_sec; 50 sleptns = tsafter.tv_nsec - tsbefore.tv_nsec; 51 if (sleptns < 0) { 52 sleptns = sleptns + 1000000000; 53 slepts = slepts - 1; 54 } 55 56 if (slepts >= 1 || sleptns > sleepnsec[i]) { 57 printf("PASS slept %ds %dns >= %d\n", 58 slepts, sleptns, sleepnsec[i]); 59 } else { 60 printf("FAIL slept %ds %dns < %d\n", 61 slepts, sleptns, sleepnsec[i]); 62 failure = 1; 63 } 64 } 65 66 if (failure) { 67 printf("At least one test FAILED\n"); 68 return PTS_FAIL; 69 } 70 71 printf("All tests PASSED\n"); 72 return PTS_PASS; 73 } 74
