Linux 线程与互斥锁的使用

互斥锁的基本函数和用于信号量的函数非常相似：

#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_unlock(pthread_mutex_t *mutex);

int pthread_mutex_destory(pthread_mutex_t *mutex);

以下是代码实例：

#include <iostream>

#include <string>
#include <pthread.h>
#include <stdio.h>
#include <semaphore.h>
using namespace std;


#define SIZE 1024


char buffer[SIZE];
void *thread_function(void *arg);
pthread_mutex_t mutex;


int main()
{
int res;
pthread_t ThreadID;
void* ThreadResult;


res = pthread_mutex_init(&mutex, NULL);
if (res != 0)
{
perror("MUTEX INIT FAILED!");
exit(EXIT_FAILURE);
}


res = pthread_create(&ThreadID, NULL, thread_function, NULL);
if (res != 0)
{
perror("Thread Create Failed!");
exit(EXIT_FAILURE);
}


printf("ThreadID:%d\n", ThreadID);


while(1)
{
pthread_mutex_lock(&mutex);
scanf("%s", buffer);
pthread_mutex_unlock(&mutex);
if (strncmp("end", buffer, 3) == 0)
{
break;
}
sleep(1);
}


res = pthread_join(ThreadID, &ThreadResult);


if (res != 0)
{
perror("Thread Join Failed");
exit(EXIT_FAILURE);
}


printf("Thread join\n");


pthread_mutex_destroy(&mutex);


return(EXIT_SUCCESS);
}


void *thread_function(void *arg)
{
sleep(1);


while(1)
{
pthread_mutex_lock(&mutex);
printf("you input %d \n", strlen(buffer));
pthread_mutex_unlock(&mutex);
if (strncmp("end", buffer, 3) == 0)
{
break;
}
sleep(1);
}
pthread_exit(NULL);
}