Viewing file:  ex17.c (2.44 KB) -rw-r--r--
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#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <limits.h>
#include <sys/mman.h>
static pthread_mutex_t synch = PTHREAD_MUTEX_INITIALIZER;
static void *
test_thread (void *v_param)
{
pthread_mutex_lock (&synch);
return NULL;
}
#define STACKSIZE 0x100000
int
main (void)
{
pthread_t thread;
pthread_attr_t attr;
int status;
void *stack, *stack2;
size_t stacksize;
pthread_attr_init (&attr);
stack = mmap (NULL, STACKSIZE,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (stack == MAP_FAILED)
{
perror ("mmap failed");
return 1;
}
status = pthread_attr_setstack (&attr, stack, STACKSIZE);
if (status != 0)
{
printf ("pthread_attr_setstack failed: %s\n", strerror (status));
return 1;
}
status = pthread_attr_getstack (&attr, &stack2, &stacksize);
if (status != 0)
{
printf ("pthread_attr_getstack failed: %s\n", strerror (status));
return 1;
}
if (stack2 != stack || stacksize != STACKSIZE)
{
printf ("first pthread_attr_getstack returned different stack (%p,%zx)\n"
"than was set by setstack (%p,%x)\n",
stack2, stacksize, stack, STACKSIZE);
return 2;
}
status = pthread_mutex_lock (&synch);
if (status != 0)
{
printf ("cannot get lock: %s\n", strerror (status));
return 1;
}
status = pthread_create (&thread, &attr, test_thread, NULL);
if (status != 0)
{
printf ("pthread_create failed: %s\n", strerror (status));
return 1;
}
status = pthread_getattr_np (thread, &attr);
if (status != 0)
{
printf ("pthread_getattr_np failed: %s\n", strerror (status));
return 1;
}
status = pthread_attr_getstack (&attr, &stack2, &stacksize);
if (status != 0)
{
printf ("pthread_attr_getstack failed: %s\n", strerror (status));
return 1;
}
if (stack2 != stack || stacksize != STACKSIZE)
{
printf ("second pthread_attr_getstack returned different stack (%p,%zx)\n"
"than was set by setstack (%p,%x)\n",
stack2, stacksize, stack, STACKSIZE);
return 3;
}
status = pthread_mutex_unlock (&synch);
if (status != 0)
{
printf ("cannot release lock: %s\n", strerror (status));
return 1;
}
/* pthread_detach (thread); */
if (pthread_join (thread, NULL) != 0)
{
printf ("join failed\n");
return 1;
}
return 0;
}
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