Linux线程互斥锁

线程互斥锁的设置就是为了多线程之间临界资源更好的共享,加了锁的资源就不能被其他的线程访问,除非

等到占用锁的线程释放该锁。

互斥锁的操作主要包括互斥锁初始化、上锁、判断上锁、解锁、摧毁互斥锁。分别由以下几个函数实现

#include <pthread.h>

int pthread_mutex_init (pthread_mutex_t* mutex, const pthread_mutexattr_t* mutexattr);

int pthread_mutex_lock(pthread_mutex_t* mutex);

int pthread_mutex_trylock(pthread_mutex_t *mutex);

int pthread_mutex_unlock (pthread_mutex_t* mutex);

int pthread_mutex_destroy (pthread_mutex_t* mutex);

下面是一段代码

 
[code]
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>
#include <unistd.h>

void *function(void *arg);
pthread_mutex_t mutex;
int counter = 0;

int main(int argc, char *argv[])
{
int rc1,rc2;
char *str1="abcdefg";
char *str2="123456";
pthread_t thread1,thread2;

pthread_mutex_init(&mutex,NULL);
if((rc1 = pthread_create(&thread1,NULL,function,str1)))
{
fprintf(stdout,"thread 1 create failed: %d\n",rc1);
}

if(rc2=pthread_create(&thread2,NULL,function,str2))
{
fprintf(stdout,"thread 2 create failed: %d\n",rc2);
}

pthread_join(thread1,NULL);
pthread_join(thread2,NULL);
return 0;
}

void *function(void *arg)
{
char *m;
m = (char *)arg;
pthread_mutex_lock(&mutex);
while(*m != '\0')
{
printf("%c",*m);
m++;
fflush(stdout);
sleep(1);
}
printf("\n");
pthread_mutex_unlock(&mutex);
}

[/code]

标签:C/C++, Linux

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