/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <errno.h> #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <time.h> #include <unistd.h> #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0 static pthread_barrier_t b2; static pthread_barrier_t bN; static void * tf (void *arg) { int e = pthread_barrier_wait (&b2); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { puts ("barrier_wait failed"); exit (1); } e = pthread_barrier_wait (&bN); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { puts ("barrier_wait failed"); exit (1); } return NULL; } #endif int do_test (void) { #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0 # define N 10 # if _POSIX_THREAD_CPUTIME == 0 if (sysconf (_SC_THREAD_CPUTIME) < 0) { puts ("_POSIX_THREAD_CPUTIME option not available"); return 1; } # endif if (pthread_barrier_init (&b2, NULL, 2) != 0 || pthread_barrier_init (&bN, NULL, N + 1) != 0) { puts ("barrier_init failed"); return 1; } struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 }; TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); pthread_t th[N + 1]; clockid_t cl[N + 1]; # ifndef CLOCK_THREAD_CPUTIME_ID if (pthread_getcpuclockid (pthread_self (), &cl[0]) != 0) { puts ("own pthread_getcpuclockid failed"); return 1; } # else cl[0] = CLOCK_THREAD_CPUTIME_ID; # endif pthread_attr_t at; if (pthread_attr_init (&at) != 0) { puts ("attr_init failed"); return 1; } if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0) { puts ("attr_setstacksize failed"); return 1; } int i; int e; for (i = 0; i < N; ++i) { if (pthread_create (&th[i], &at, tf, NULL) != 0) { puts ("create failed"); return 1; } e = pthread_barrier_wait (&b2); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { puts ("barrier_wait failed"); return 1; } ts.tv_sec = 0; ts.tv_nsec = 100000000; TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); if (pthread_getcpuclockid (th[i], &cl[i + 1]) != 0) { puts ("pthread_getcpuclockid failed"); return 1; } } if (pthread_attr_destroy (&at) != 0) { puts ("attr_destroy failed"); return 1; } struct timespec t[N + 1]; for (i = 0; i < N + 1; ++i) if (clock_gettime (cl[i], &t[i]) != 0) { printf ("clock_gettime round %d failed\n", i); return 1; } for (i = 0; i < N; ++i) { struct timespec diff; diff.tv_sec = t[i].tv_sec - t[i + 1].tv_sec; diff.tv_nsec = t[i].tv_nsec - t[i + 1].tv_nsec; if (diff.tv_nsec < 0) { diff.tv_nsec += 1000000000; --diff.tv_sec; } if (diff.tv_sec < 0 || (diff.tv_sec == 0 && diff.tv_nsec < 100000000)) { printf ("\ difference between thread %d and %d too small (%ld.%09ld)\n", i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec); return 1; } printf ("diff %d->%d: %ld.%09ld\n", i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec); } ts.tv_sec = 0; ts.tv_nsec = 0; for (i = 0; i < N + 1; ++i) if (clock_settime (cl[i], &ts) != 0) { printf ("clock_settime(%d) round %d failed\n", cl[i], i); return 1; } for (i = 0; i < N + 1; ++i) { if (clock_gettime (cl[i], &ts) != 0) { puts ("clock_gettime failed"); return 1; } if (ts.tv_sec > t[i].tv_sec || (ts.tv_sec == t[i].tv_sec && ts.tv_nsec > t[i].tv_nsec)) { puts ("clock_settime didn't reset clock"); return 1; } } #endif return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"