pthread简单的同步

一个小例子：

/***************************************************************************************************** * File name: ~vs2CAF.cpp * Create time: 2011/06/26* Module: View * Author: zengqh * Blog: http://blog.csdn.net/aimyton * --------------------------------------------------------------------------------------------------- * Memo: * *****************************************************************************************************/ #include <stdlib.h>#include <stdio.h>#include "apue.h"#include <unistd.h>#include <errno.h>#include <pthread.h>/***************************************************************************************************** * Macro and Struct definition *****************************************************************************************************/ /***************************************************************************************************** * Global variables *****************************************************************************************************/static volatile sig_atomic_t value = 0;static pthread_mutex_tmutex_handle;/***************************************************************************************************** * Global function declare *****************************************************************************************************/ /***************************************************************************************************** * Global function definition *****************************************************************************************************/void* read_value(void* param){for(;;){pthread_mutex_lock(&mutex_handle);printf("read value: %d/n", value);usleep(20);pthread_mutex_unlock(&mutex_handle);}return NULL;}void* write_value(void* param){for(;;){pthread_mutex_lock(&mutex_handle);value++;printf("write value: %d/n", value);usleep(40);pthread_mutex_unlock(&mutex_handle);}return NULL;}int main(){intret;pthread_tthread_id_1;pthread_tthread_id_2;ret = pthread_mutex_init(&mutex_handle, NULL);if(0 != ret){printf("pthread mutex init failed./n");return -1;}ret = pthread_create(&thread_id_1, NULL, read_value, NULL);if(0 != ret){printf("pthead create failed for 1./n");return -1;}ret = pthread_create(&thread_id_2, NULL, write_value, NULL);if(0 != ret){printf("pthead create failed for 2./n");return -1;}pthread_join(thread_id_1, NULL);pthread_join(thread_id_2, NULL);pthread_mutex_destroy(&mutex_handle);return 0;}/***************************************************************************************************** * Class declare ******************************************************************************************************//***************************************************************************************************** * Class definition *****************************************************************************************************//***********************************End of File*******************************************************/