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Viewing changes to exp-drd/tests/pth_cond_race.c

  • Committer: Bazaar Package Importer
  • Author(s): Andrés Roldán
  • Date: 2008-06-13 02:31:40 UTC
  • mto: (1.4.1 upstream) (2.2.1 squeeze)
  • mto: This revision was merged to the branch mainline in revision 24.
  • Revision ID: james.westby@ubuntu.com-20080613023140-iwk33rz9rhvfkr96
Import upstream version 3.3.1

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exp-drd/tests/pth_cond_race.c
 
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/* Unit test for drd that triggers a race on the use of a POSIX condition
 
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   variable. By Bart Van Assche.
 
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*/
 
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#include <assert.h>
 
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#include <stdio.h>      // printf()
 
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#include <pthread.h>
 
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#include <unistd.h>    // usleep()
 
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#include "../drd_clientreq.h"
 
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// Local functions declarations.
 
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static void* thread_func(void* thread_arg);
 
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// Local variables.
 
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static pthread_mutex_t s_mutex;
 
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static pthread_cond_t  s_cond;
 
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static int             s_use_mutex = 0;
 
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// Function definitions.
 
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static void set_thread_name(const char* const name)
 
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{
 
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  int res;
 
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  VALGRIND_DO_CLIENT_REQUEST(res, 0, VG_USERREQ__SET_THREAD_NAME,
 
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                             "%s", name, 0, 0, 0);
 
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}
 
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int main(int argc, char** argv)
 
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{
 
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  int optchar;
 
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  pthread_t threadid;
 
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  set_thread_name("main");
 
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  while ((optchar = getopt(argc, argv, "m")) != EOF)
 
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  {
 
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    switch (optchar)
 
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    {
 
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    case 'm':
 
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      s_use_mutex = 1;
 
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      break;
 
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    default:
 
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      assert(0);
 
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    }
 
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  }
 
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  pthread_cond_init(&s_cond, 0);
 
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  pthread_mutex_init(&s_mutex, 0);
 
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  pthread_mutex_lock(&s_mutex);
 
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  pthread_create(&threadid, 0, thread_func, 0);
 
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  pthread_cond_wait(&s_cond, &s_mutex);
 
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  pthread_mutex_unlock(&s_mutex);
 
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  pthread_join(threadid, 0);
 
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  pthread_mutex_destroy(&s_mutex);
 
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  pthread_cond_destroy(&s_cond);
 
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  return 0;
 
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}
 
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static void* thread_func(void* thread_arg)
 
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{
 
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  set_thread_name("thread_func");
 
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  // Wait until the main thread has entered pthread_cond_wait().
 
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  pthread_mutex_lock(&s_mutex);
 
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  pthread_mutex_unlock(&s_mutex);
 
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  // Signal the condition variable.
 
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  if (s_use_mutex) pthread_mutex_lock(&s_mutex);
 
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  pthread_cond_signal(&s_cond);
 
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  if (s_use_mutex) pthread_mutex_unlock(&s_mutex);
 
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  return 0;
 
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}