linux c编程 -- 线程互斥

    #include <stdio.h>
    #include <pthread.h>
    #include <unistd.h>
    #include <stdlib.h>  

    static int value = 0;
    pthread_mutex_t mutex;  

    void* func(void* args)
    {
        while(1)
        {
            pthread_mutex_lock(&mutex);
            sleep(1);
            value ++;
            printf("value = %d!\n", value);
            pthread_mutex_unlock(&mutex);
        }
    }  

    int main()
    {
        pthread_t pid1, pid2;
        pthread_mutex_init(&mutex, NULL);  

        if(pthread_create(&pid1, NULL, func, NULL))
        {
            return -1;
        }  

        if(pthread_create(&pid2, NULL, func, NULL))
        {
            return -1;
        }  

        pthread_join(pid1, NULL);
        pthread_join(pid2, NULL);

        return 0;
    }