linux进程间互斥

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

#define BUFFER_SIZE 5
int buffer[BUFFER_SIZE];
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

void *producer(void *arg) {
    for (int i = 0; i < 10; ++i) {
        pthread_mutex_lock(&mutex);
        while (count == BUFFER_SIZE) {
            pthread_mutex_unlock(&mutex);
            pthread_mutex_lock(&mutex);
        }
        buffer[count++] = i;
        printf("Produced: %d\n", i);
        pthread_mutex_unlock(&mutex);
    }
    pthread_exit(NULL);
}

void *consumer(void *arg) {
    for (int i = 0; i < 10; ++i) {
        pthread_mutex_lock(&mutex);
        while (count == 0) {
            pthread_mutex_unlock(&mutex);
            pthread_mutex_lock(&mutex);
        }
        int item = buffer[--count];
        printf("Consumed: %d\n", item);
        pthread_mutex_unlock(&mutex);
    }
    pthread_exit(NULL);
}

int main() {
    pthread_t producer_thread, consumer_thread;
    pthread_create(&producer_thread, NULL, producer, NULL);
    pthread_create(&consumer_thread, NULL, consumer, NULL);
    pthread_join(producer_thread, NULL);
    pthread_join(consumer_thread, NULL);
    pthread_mutex_destroy(&mutex);
    return 0;
}