源码如下
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
unsigned int value1, value2, count;
pthread_mutex_t mutex1,mutex2;
void *function(void *arg);
void *function(void *arg)
{
pthread_mutex_lock(&mutex2);
printf("new thread get mutex2\n");
sleep(1);
pthread_mutex_lock(&mutex1);
printf("new thread get mutex1\n");
pthread_mutex_unlock(&mutex1);
printf("new thread release mutex1\n");
pthread_mutex_unlock(&mutex2);
printf("new thread release mutex2\n");
return NULL;
}
int main(int argc, char *argv[])
{
pthread_t a_thread;
if (pthread_mutex_init(&mutex1, NULL) < 0)
{
perror("fail to mutex_init");
exit(-1);
}
if (pthread_mutex_init(&mutex2, NULL) < 0)
{
perror("fail to mutex_init");
exit(-1);
}
if (pthread_create(&a_thread, NULL, function, NULL) < 0)
{
perror("fail to pthread_create");
exit(-1);
}
while ( 1 )
{
pthread_mutex_lock(&mutex1);
printf("main thread get mutex1\n");
sleep(1);
pthread_mutex_lock(&mutex2);
printf("main thread get mutex2\n");
pthread_mutex_unlock(&mutex2);
printf("main thread release mutex2\n");
pthread_mutex_unlock(&mutex1);
printf("main thread release mutex1\n");
}
return 0;
}
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