everyday one code-multthread

is being running at ubunte linux system.

dusibo hunan yongzhou

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

static int run=1;
static int retvalue;

void *start_routine(void *arg)
{
int *running=(int *)arg;
printf("child thread initation complete %d/n",*running);

while(*running)
{
printf("child thread running/n");

usleep(1);
}

printf("child thread out/n");

retvalue=8;

pthread_exit((void**)retvalue);
}

int main(void)
{
pthread_t pt;
int ret=-1;
int time=3;
int i=0;
int *ret_join=NULL;

ret=pthread_create(&pt,NULL,start_routine,&run);

if(ret!=0)
{
printf("build a thread/n");

return 1;
}

usleep(1);

for(;i<time;i++)
{
printf("root thread print/n");

usleep(1);
}

run=0;
pthread_join(pt,(void**)ret_join);
printf("bak value is %d/n",*ret_join);

return 0;
}

杜思波 2011 湖南