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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。
#more test.c
/*
* =====================================================================================
* Filename: thead.c
* Description: getspecific
* Created: 05/10/2011 12:09:43 AM
* =====================================================================================
*/
#include<stdio.h>
#include<pthread.h>
#include<string.h>
pthread_key_t p_key;
void func1()
{
int *tmp = (int*)pthread_getspecific(p_key);//同一线程内的各个函数间共享数据。
printf("%d is runing in %s\n",*tmp,__func__);
}
void *thread_func(void *args)
{
pthread_setspecific(p_key,args);
int *tmp = (int*)pthread_getspecific(p_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;
int a=1;
int b=2;
pthread_key_create(&p_key,NULL);
pthread_create(&pa, NULL,thread_func,&a);
pthread_create(&pb, NULL,thread_func,&b);
pthread_join(pa, NULL);
pthread_join(pb, NULL);
return 0;
}
#gcc -lpthread test.c -o test
# ./test
2 is runing in thread_func
1 is runing in thread_func
100 is runing in func1
200 is runing in func1
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