#define _GNU_SOURCE
#include<pthread.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <unistd.h>
#include<errno.h>
void display_thread_attr(pthread_attr_t *attr) {
int ret, a;
size_t s;
void *saddr;
ret = pthread_attr_getguardsize(attr, &s);
if (ret != 0) {
printf("pthread_attr_getguardsize error \n");
return;
}
printf("Guard size = %zu bytes\n", s);
ret = pthread_attr_getstack(attr, &saddr, &s);
if (ret != 0 ){
printf("pthread_attr_getstack error \n");
return;
}
printf("Stack address = %p\n", saddr);
printf("Stack size = %#zx bytes\n", s);
}
static void *threadfun(void *arg)
{
pthread_attr_t gattr;
int ret;
char *s=(char *)arg;
ret = pthread_getattr_np(pthread_self(), &gattr);
if (ret != 0) {
printf("pthread_getattr_np error \n");
return (void *)-1;
}
display_thread_attr(&gattr);
}
int main()
{
pthread_t th;
pthread_attr_t attr;
int ret;
size_t st_size = 16900;
void *sp;
int align = getpagesize();
ret = posix_memalign(&sp, align, st_size);
if (ret != 0) {
printf("posix_memalign error\n");
return -1;
}
ret = pthread_attr_init(&attr);
if (ret != 0) {
printf("Pthread attribute init error\n");
return -1;
}
ret = pthread_attr_setstack(&attr, sp, st_size);
if (ret != 0) {
printf("Pthread attr set stack error\n");
return -1;
}
ret = pthread_create(&th,&attr,&threadfun,NULL);
if (ret != 0) {
printf("pthread create error\n");
return -1;
}
ret = pthread_attr_destroy(&attr);
if (ret != 0) {
printf("pthread attr destroy error\n");
return -1;
}
ret = pthread_join(th, NULL);
if (ret != 0) {
printf("pthread_join error \n");
return -1;
}
return 0;
}
