testperf.c

来自「opensolaris操作系统下面的一些练习用源码opensolaris操作系统」· C语言 代码 · 共 87 行

#include <pthread.h>

void thread1(void)
{
    long i;
    long x = 0;
    printf("Thread 1 begin.\n");
    for( i = 0 ; i < 1000000000; i ++ )
    {
        x++;
    }
    printf("Thread 1 End.\n");
}

void thread2(void)
{
    long i;
    long x = 0;
    printf("Thread 2 begin.\n");
    for( i = 0 ; i < 1000000000; i ++ )
    {
        x++;
    }
    printf("Thread 2 End.\n");
}

void thread3(void)
{
    long i;
    long x = 0;
    printf("Thread 3 begin.\n");
    for( i = 0 ; i < 1000000000; i ++ )
    {
        x++;
    }
    printf("Thread 3 End.\n");
}

void thread4(void)
{
    long i;
    long x = 0;
    printf("Thread 4 begin.\n");
    for( i = 0 ; i < 1000000000; i ++ )
    {
        x++;
    }
    printf("Thread 4 End.\n");
}

int main(void)
{
    pthread_t id1, id2 , id3 , id4;
    int i,ret;

    printf("Main process begin.\n");

    ret=pthread_create(&id1,NULL,(void *) thread1,NULL);
    if(ret!=0){
         printf ("Create pthread 1 error!\n");
         exit (1);
    }
    ret=pthread_create(&id2,NULL,(void *) thread2,NULL);
    if(ret!=0){
         printf ("Create pthread 2 error!\n");
         exit (1);
    }
    ret=pthread_create(&id3,NULL,(void *) thread3,NULL);
    if(ret!=0){
         printf ("Create pthread 3 error!\n");
         exit (1);
    }
    ret=pthread_create(&id4,NULL,(void *) thread4,NULL);
    if(ret!=0){
         printf ("Create pthread 4 error!\n");
         exit (1);
    }

    pthread_join(id1,NULL);
    pthread_join(id2,NULL);
    pthread_join(id3,NULL);
    pthread_join(id4,NULL);

    printf("Main process end.\n");
    return (0);
}