线程间同步更简单的方式 无名信号量

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

sem_t bin_sem;
void *thread_function1(void *arg)
{
    printf("thread_function1--------------sem_wait\n");
    sem_wait(&bin_sem);
    printf("sem_wait\n");
    while (1)
    {
    }
}

void *thread_function2(void *arg)
{
    printf("thread_function2--------------sem_post\n");
    sem_post(&bin_sem);
    printf("sem_post\n");
    while (1)
    {
    }
}



int main()
{
    int res;
    pthread_t a_thread;
    void *thread_result;

    res = sem_init(&bin_sem, 0, 0);
    if (res != 0)
    {
        perror("Semaphore initialization failed");
    }
    printf("sem_init\n");
    res = pthread_create(&a_thread, NULL, thread_function1, NULL);
    if (res != 0)
    {
        perror("Thread creation failure");
    }
    printf("thread_function1\n");
    sleep (5);
    printf("sleep\n");
    res = pthread_create(&a_thread, NULL, thread_function2, NULL);
    if (res != 0)
    {
        perror("Thread creation failure");
    }
    while (1)
    {
    }
}