Back to index

glibc  2.9
Defines | Functions | Variables
tst-once4.c File Reference
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "../test-skeleton.c"
This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()
#define TIMEOUT   4

Functions

static void once_handler1 (void)
static void once_handler2 (void)
static void cl (void *arg)
static void * tf1 (void *arg)
static void * tf2 (void *arg)
static int do_test (void)

Variables

static pthread_once_t once = PTHREAD_ONCE_INIT
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER
static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER
static pthread_barrier_t bar
static int global
static int cl_called

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 200 of file tst-once4.c.

#define TIMEOUT   4

Definition at line 201 of file tst-once4.c.


Function Documentation

static void cl ( void *  arg) [static]

Definition at line 67 of file tst-once4.c.

{
  ++cl_called;
}

Here is the caller graph for this function:

static int do_test ( void  ) [static]

Definition at line 109 of file tst-once4.c.

{
  pthread_t th[2];

  if (pthread_barrier_init (&bar, NULL, 2) != 0)
    {
      puts ("barrier_init failed");
      return 1;
    }

  if (pthread_create (&th[0], NULL, tf1, NULL) != 0)
    {
      puts ("first create failed");
      return 1;
    }

  int r = pthread_barrier_wait (&bar);
  if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("first barrier_wait failed");
      return 1;
    }

  if (pthread_mutex_lock (&mut) != 0)
    {
      puts ("mutex_lock failed");
      return 1;
    }
  /* We unlock the mutex so that we catch the case where the pthread_cond_wait
     call incorrectly resumes and tries to get the mutex.  */
  if (pthread_mutex_unlock (&mut) != 0)
    {
      puts ("mutex_unlock failed");
      return 1;
    }

  if (pthread_create (&th[1], NULL, tf2, NULL) != 0)
    {
      puts ("second create failed");
      return 1;
    }

  r = pthread_barrier_wait (&bar);
  if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("second barrier_wait failed");
      return 1;
    }

  /* Give the second thread a chance to reach the pthread_once call.  */
  sleep (2);

  /* Cancel the thread.  */
  if (pthread_cancel (th[0]) != 0)
    {
      puts ("cancel failed");
      return 1;
    }

  void *result;
  pthread_join (th[0], &result);
  if (result != PTHREAD_CANCELED)
    {
      puts ("first join didn't return PTHREAD_CANCELED");
      return 1;
    }

  puts ("joined first thread");

  pthread_join (th[1], &result);
  if (result != NULL)
    {
      puts ("second join didn't return PTHREAD_CANCELED");
      return 1;
    }

  if (global != 1)
    {
      puts ("global still 0");
      return 1;
    }

  if (cl_called != 1)
    {
      printf ("cl_called = %d\n", cl_called);
      return 1;
    }

  return 0;
}

Here is the call graph for this function:

static void once_handler1 ( void  ) [static]

Definition at line 38 of file tst-once4.c.

{
  if (pthread_mutex_lock (&mut) != 0)
    {
      puts ("once_handler1: mutex_lock failed");
      exit (1);
    }

  int r = pthread_barrier_wait (&bar);
  if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("once_handler1: barrier_wait failed");
      exit (1);
    }

  pthread_cond_wait (&cond, &mut);

  /* We should never get here.  */
}

Here is the call graph for this function:

Here is the caller graph for this function:

static void once_handler2 ( void  ) [static]

Definition at line 60 of file tst-once4.c.

{
  global = 1;
}

Here is the caller graph for this function:

static void* tf1 ( void *  arg) [static]

Definition at line 74 of file tst-once4.c.

{
  pthread_cleanup_push (cl, NULL);

  pthread_once (&once, once_handler1);

  pthread_cleanup_pop (0);

  /* We should never get here.  */
  puts ("pthread_once in tf returned");
  exit (1);
}

Here is the call graph for this function:

Here is the caller graph for this function:

static void* tf2 ( void *  arg) [static]

Definition at line 89 of file tst-once4.c.

{
  pthread_cleanup_push (cl, NULL);

  int r = pthread_barrier_wait (&bar);
  if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("once_handler2: barrier_wait failed");
      exit (1);
    }

  pthread_cleanup_pop (0);

  pthread_once (&once, once_handler2);

  return NULL;
}

Here is the call graph for this function:

Here is the caller graph for this function:


Variable Documentation

pthread_barrier_t bar [static]

Definition at line 32 of file tst-once4.c.

int cl_called [static]

Definition at line 35 of file tst-once4.c.

Definition at line 29 of file tst-once4.c.

int global [static]

Definition at line 34 of file tst-once4.c.

Definition at line 30 of file tst-once4.c.

Definition at line 27 of file tst-once4.c.