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Viewing changes to helgrind/tests/tc06_two_races.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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helgrind/tests/tc06_two_races.c
 
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#include <pthread.h>
 
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#include <stdio.h>
 
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#include <stdlib.h>
 
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/* Simple test program, has two races.  A happens-before detector can only
 
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   ever detect one of them, though. */
 
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int unprot1 = 0, unprot2 = 0, prot = 0;
 
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pthread_mutex_t mu = PTHREAD_MUTEX_INITIALIZER;
 
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void* child_fn ( void* arg )
 
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{
 
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   unprot1 ++;
 
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   pthread_mutex_lock( &mu );
 
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   prot ++;
 
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   pthread_mutex_unlock( &mu );
 
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   unprot2 ++;
 
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   return NULL;
 
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}
 
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int main ( void )
 
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{
 
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   pthread_t child;
 
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   if (pthread_create(&child, NULL, child_fn, NULL)) {
 
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      perror("pthread_create");
 
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      exit(1);
 
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   }
 
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   unprot1 ++;
 
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   pthread_mutex_lock( &mu );
 
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   prot ++;
 
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   pthread_mutex_unlock( &mu );
 
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   unprot2 ++;
 
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   if (pthread_join(child, NULL)) {
 
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      perror("pthread join");
 
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      exit(1);
 
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   }
 
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   return 0;
 
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}