linuxthreads/Examples/ex17.c

   1 #include <errno.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <pthread.h>
   5 #include <unistd.h>
   6 #include <limits.h>
   7 #include <sys/mman.h>
   8
   9 static void *
  10 test_thread (void *v_param)
  11 {
  12   return NULL;
  13 }
  14
  15 #define STACKSIZE 0x100000
  16
  17 int
  18 main (void)
  19 {
  20   pthread_t thread;
  21   pthread_attr_t attr;
  22   int status;
  23   void *stack, *stack2;
  24   size_t stacksize;
  25
  26   pthread_attr_init (&attr);
  27   stack = mmap (NULL, STACKSIZE,
  28                 PROT_READ | PROT_WRITE | PROT_EXEC,
  29                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  30
  31   if (stack == MAP_FAILED)
  32     {
  33       perror ("mmap failed");
  34       return 1;
  35     }
  36
  37   status = pthread_attr_setstack (&attr, stack, STACKSIZE);
  38   if (status != 0)
  39     {
  40       printf ("pthread_attr_setstack failed: %s\n", strerror (status));
  41       return 1;
  42     }
  43
  44   status = pthread_attr_getstack (&attr, &stack2, &stacksize);
  45   if (status != 0)
  46     {
  47       printf ("pthread_attr_getstack failed: %s\n", strerror (status));
  48       return 1;
  49     }
  50
  51   if (stack2 != stack || stacksize != STACKSIZE)
  52     {
  53       printf ("first pthread_attr_getstack returned different stack (%p,%x)\n"
  54               "than was set by setstack (%p,%x)\n",
  55               stack2, stacksize, stack, STACKSIZE);
  56       return 2;
  57     }
  58
  59   status = pthread_create (&thread, &attr, test_thread, NULL);
  60   if (status != 0)
  61     {
  62       printf ("pthread_create failed: %s\n", strerror (status));
  63       return 1;
  64     }
  65
  66   status = pthread_getattr_np (thread, &attr);
  67   if (status != 0)
  68     {
  69       printf ("pthread_getattr_np failed: %s\n", strerror (status));
  70       return 1;
  71     }
  72
  73   status = pthread_attr_getstack (&attr, &stack2, &stacksize);
  74   if (status != 0)
  75     {
  76       printf ("pthread_attr_getstack failed: %s\n", strerror (status));
  77       return 1;
  78     }
  79
  80   if (stack2 != stack || stacksize != STACKSIZE)
  81     {
  82       printf ("second pthread_attr_getstack returned different stack (%p,%x)\n"
  83               "than was set by setstack (%p,%x)\n",
  84               stack2, stacksize, stack, STACKSIZE);
  85       return 3;
  86     }
  87
  88   /* pthread_detach (thread); */
  89   if (pthread_join (thread, NULL) != 0)
  90     {
  91       printf ("join failed\n");
  92       return 1;
  93     }
  94   return 0;
  95 }