Attachment 199443 Details for Bug 233396 – simple c code

simple c code

demo_thread.c (text/plain), 1.01 KB, created by Steevan on 2018-11-22 05:17:01 UTC

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Creator: Steevan

Created: 2018-11-22 05:17:01 UTC

Size: 1.01 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <unistd.h>  
>#include <pthread.h>
>#include <sys/time.h> 
>
>void *myThreadFun(void *vargp) 
>{ 
>//    sleep(1); 
>    printf("Printing from demo for thread creation time \n"); 
>    return NULL; 
>} 
>   
>void main(void)
>{
>    pthread_t thread_id; 
>    unsigned long int usec, usec2, sec, sec2;
>    struct timeval  tv, tv2;
>    struct timezone tz;
>    pthread_attr_t  attr;
> 
>    pthread_attr_init(&attr);
>    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
>
>    gettimeofday(&tv, &tz);  // take time before creating thread
>    pthread_create(&thread_id, &attr, myThreadFun, NULL); 
>    gettimeofday(&tv2, &tz);   // take time after creation of thread
>
>    pthread_join(thread_id, NULL); 
>    usec = tv.tv_usec;
>    sec = tv.tv_sec;
>    usec2 = tv2.tv_usec;
>    sec2 = tv2.tv_sec;
>    printf("Thread creation time details are: \n"); 
>    printf("Before: Sec %lu usec %lu  After: Sec %lu usec %lu : SecDiff %lu UsecDiff %lu \n", sec, usec, sec2, usec2, sec2 - sec , usec2 - usec); 
>
>}

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Attachments on bug 233396: 199443