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
main(void)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