线程的创建，加锁，解锁销毁锁

#include <pthread.h>
int pthread_mutex_init(pthread_mutex_t *restrict mutex, const pthread_mutexattr_t *restrict attr);
销毁int pthread_mutex_destroy(pthread_mutex_t mutex);
// 返回：若成功返回0，否则返回错误编号
#include <pthread.h>
加锁int pthread_mutex_lock(pthread_mutex_t mutex);
加锁不阻塞int pthread_mutex_trylock(pthread_mutex_t mutex);
解锁int pthread_mutex_unlock(pthread_mutex_t mutex);
// 返回：若成功返回0，否则返回错误编号

#include <stdio.h>
#include <pthread.h>
//       int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
  //                        void *(*start_routine) (void *), void *arg);
pthread_mutex_t mutex;  //创建锁
void *func1(void *str)
{	
	pthread_mutex_lock(&mutex);
	printf("t1:str=%dn",*((int *)str));
	printf("t1:id=%ldn",(unsigned long)pthread_self());
	pthread_mutex_unlock(&mutex);
}
void *func2(void *str)
{
	pthread_mutex_lock(&mutex);
	printf("t2:str=%dn",*((int *)str));
	printf("t2:id=%ldn",(unsigned long)pthread_self());
	pthread_mutex_unlock(&mutex);

}
int main ()
{	
	int ret;
	pthread_t t1 ;
	pthread_t t2 ;
	int len=100;
	int len1=102;
	pthread_mutex_init(&mutex,NULL); //初始化锁
	ret=pthread_create(&t1,NULL,func1,(void*)&len);
	if(ret==0){
		printf("main:ptherad t1 create successn");
		printf("main:id=%ldn",(unsigned long)pthread_self());
		
	}
	ret=pthread_create(&t2,NULL,func2,(void*)&len1);
	if(ret==0){
		printf("main:ptherad t2 create successn");
		printf("main:id=%ldn",(unsigned long)pthread_self());
		
	}

	pthread_join(t1,NULL);
	pthread_join(t2,NULL);
	pthread_mutex_destroy(&mutex);	
	return 0;
}

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