test_cond.c revision e16cb84e2324f05334d18dcf5956f20f44262b62
1e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project/* 2e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 3e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * All rights reserved. 4e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * 5e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * Redistribution and use in source and binary forms, with or without 6e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * modification, are permitted provided that the following conditions 7e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * are met: 8e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * * Redistributions of source code must retain the above copyright 9e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * notice, this list of conditions and the following disclaimer. 10e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * * Redistributions in binary form must reproduce the above copyright 11e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * notice, this list of conditions and the following disclaimer in 12e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * the documentation and/or other materials provided with the 13e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * distribution. 14e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * 15e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * SUCH DAMAGE. 27e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project */ 28e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <pthread.h> 29e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <semaphore.h> 30e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <errno.h> 31e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <stdio.h> 32e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <time.h> 33e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <string.h> 34e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <unistd.h> 35e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 36e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectstatic pthread_mutex_t lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER; 37e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectstatic pthread_cond_t wait = PTHREAD_COND_INITIALIZER; 38e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 39e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectstatic void* _thread1(void *__u __attribute__((unused))) 40e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project{ 41e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("1: obtaining mutex\n"); 42e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_mutex_lock(&lock); 43e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("1: waiting on condition variable\n"); 44e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_cond_wait(&wait, &lock); 45e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("1: releasing mutex\n"); 46e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_mutex_unlock(&lock); 47e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("1: exiting\n"); 48e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project return NULL; 49e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project} 50e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 51e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectstatic void* _thread2(void *__u __attribute__((unused))) 52e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project{ 53e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project int cnt = 2; 54e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project while(cnt--) { 55e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("2: obtaining mutex\n"); 56e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_mutex_lock(&lock); 57e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("2: signaling\n"); 58e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_cond_signal(&wait); 59e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("2: releasing mutex\n"); 60e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_mutex_unlock(&lock); 61e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project } 62e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 63e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("2: exiting\n"); 64e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project return NULL; 65e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project} 66e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 67e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projecttypedef void* (*thread_func)(void*); 68e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectstatic const thread_func thread_routines[] = 69e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project{ 70e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project &_thread1, 71e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project &_thread2, 72e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project}; 73e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 74e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectint main(void) 75e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project{ 76e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project pthread_t t[2]; 77e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project int nn; 78e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project int count = (int)(sizeof t/sizeof t[0]); 79e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 80e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project for (nn = 0; nn < count; nn++) { 81e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("main: creating thread %d\n", nn+1); 82e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project if (pthread_create( &t[nn], NULL, thread_routines[nn], NULL) < 0) { 83e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("main: could not create thread %d: %s\n", nn+1, strerror(errno)); 84e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project return -2; 85e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project } 86e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project } 87e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 88e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project for (nn = 0; nn < count; nn++) { 89e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("main: joining thread %d\n", nn+1); 90e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project if (pthread_join(t[nn], NULL)) { 91e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("main: could not join thread %d: %s\n", nn+1, strerror(errno)); 92e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project return -2; 93e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project } 94e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project } 95e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 96e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project return 0; 97e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project} 98