pthread_getspecific()和pthread_setspecific()的使用方法

pthread_getpecific和pthread_setspecific实现同一个线程中不同函数间共享数据的一种很好的方式。

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
pthread_key_t key;
void func1()
{

	int *tmp = (int*)pthread_getspecific(key);
	printf("%d is fun is %s\r\n",*tmp,__func__);
}
void *tthread_fun(void* args)
{

	pthread_setspecific(key,args);
	int *tmp = (int*)pthread_getspecific(key);
	printf("%d is in zhu %s\r\n",*(int*)args,__func__);
	*tmp+=1;
	func1();


	return (void*)0;		
}
void *thread_fun(void *args)
{
	pthread_setspecific(key,args);
	int *tmp = (int*)pthread_getspecific(key);//获得线程的私有空间
	printf("%d is runing in %s\n",*tmp,__func__);
	*tmp = (*tmp)*100;//修改私有变量的值
	func1();
	return (void*)0;
}

int main()
{

	pthread_t pa, pb;
	pthread_key_create(&key,NULL);

	pthread_t pid[3];
	int a[3]={100,200,300};
	int i=0;
	for(i=0;i<3;i++)
	{

		pthread_create(&pid[i],NULL,tthread_fun,&a[i]);
		pthread_join(pid[i],NULL);

	}
	return 0;
}