1 /* 2 * Copyright (c) 2004, Intel Corporation. All rights reserved. 3 * This file is licensed under the GPL license. For the full content 4 * of this license, see the COPYING file at the top level of this 5 * source tree. 6 * 7 * adam.li (at) intel.com 8 * 9 * if _POSIX_THREAD_CPUTIME is defined, the new thread shall have a CPU-time 10 * clock accessible, and the initial value of this clock shall be set to 0. 11 */ 12 /* Do some work in the main thread so that it's clock value is non zero. 13 * Create a new thread and get the time of the thread CUP-time clock 14 * using clock_gettime(). 15 * Note, the tv_nsec cannot be exactly 0 at the time of calling 16 * clock_gettime() since the thread has executed some time. 17 */ 18 19 #define _XOPEN_SOURCE 600 20 #include <unistd.h> 21 #include <pthread.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <time.h> 25 #include <string.h> 26 #include <signal.h> 27 #include <sys/time.h> 28 #include "posixtest.h" 29 30 static void *a_thread_func() 31 { 32 struct timespec ts = {.tv_sec = 1,.tv_nsec = 1 }; 33 34 clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts); 35 36 /* We expect the clock to be less than 0.1s */ 37 if (ts.tv_sec != 0 || ts.tv_nsec >= 100000000) { 38 printf("FAIL: ts.tv_sec: %ld, ts.tv_nsec: %ld\n", 39 ts.tv_sec, ts.tv_nsec); 40 exit(PTS_FAIL); 41 } 42 43 return NULL; 44 } 45 46 static volatile sig_atomic_t flag = 1; 47 48 static void alarm_handler() 49 { 50 flag = 0; 51 } 52 53 int main(void) 54 { 55 int ret; 56 struct itimerval it = {.it_value = {.tv_sec = 0, .tv_usec = 100000}}; 57 58 #if _POSIX_THREAD_CPUTIME == -1 59 printf("_POSIX_THREAD_CPUTIME not supported\n"); 60 return PTS_UNSUPPORTED; 61 #endif 62 pthread_t new_th; 63 64 if (sysconf(_SC_THREAD_CPUTIME) == -1) { 65 printf("_POSIX_THREAD_CPUTIME not supported\n"); 66 return PTS_UNSUPPORTED; 67 } 68 69 /* Let's do some work in the main thread so that it's cputime > 0 */ 70 if (signal(SIGVTALRM, alarm_handler)) { 71 perror("signal()"); 72 return PTS_UNRESOLVED; 73 } 74 75 if (setitimer(ITIMER_VIRTUAL, &it, NULL)) { 76 perror("setitimer(ITIMER_VIRTUAL, ...)"); 77 return PTS_UNRESOLVED; 78 } 79 80 while (flag); 81 82 ret = pthread_create(&new_th, NULL, a_thread_func, NULL); 83 if (ret) { 84 fprintf(stderr, "pthread_create(): %s\n", strerror(ret)); 85 return PTS_UNRESOLVED; 86 } 87 88 pthread_join(new_th, NULL); 89 printf("Test PASSED\n"); 90 return PTS_PASS; 91 } 92
