Linux下线程互斥，只需多加三行代码！

pthread_mutex_t mutex =PTHREAD_MUTEX_INITIALIZER;

int pthread_mutex_lock(pthread_mutex_t *mutex);

int pthread_mutex_unlock(pthread_mutex_t *mutex);

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

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

void *func(void *arg)
{
pthread_mutex_lock(&mutex);
int *a = (int *)arg;
printf("thread%d start\n", *a);
int i;
for(i=0;i<10;i++)
{
printf("thread%d is running\n", *a);
sleep(1);
}
printf("thread%d end\n", *a);
pthread_mutex_unlock(&mutex);
pthread_exit(NULL);
}
int main(int arg, char * args[])
{
printf("process start\n");
pthread_t thr_d1, thr_d2;
int i[2];
i[0] = 1; i[1] =2;
pthread_create(&thr_d1, NULL, func, &i[0]);
pthread_create(&thr_d2, NULL, func, &i[1]);
pthread_join(thr_d1, NULL);
pthread_join(thr_d2, NULL);
printf("process end\n");
return 0;
}