[tsan] Replace POSIX semaphores with pthread condition variables in vptr_benign_race.cc
OS X doesn't support POSIX semaphores (but it does have the API for it, which returns ENOSYS - "Function not implemented"). Differential Revision: http://reviews.llvm.org/D14865 llvm-svn: 253665
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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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#include <pthread.h>
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#include <semaphore.h>
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#include <stdio.h>
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struct A {
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A() {
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sem_init(&sem_, 0, 0);
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pthread_mutex_init(&m, 0);
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pthread_cond_init(&c, 0);
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signaled = false;
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}
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virtual void F() {
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}
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void Done() {
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sem_post(&sem_);
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pthread_mutex_lock(&m);
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signaled = true;
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pthread_cond_signal(&c);
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pthread_mutex_unlock(&m);
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}
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virtual ~A() {
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}
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sem_t sem_;
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pthread_mutex_t m;
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pthread_cond_t c;
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bool signaled;
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};
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struct B : A {
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virtual void F() {
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}
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virtual ~B() {
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sem_wait(&sem_);
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sem_destroy(&sem_);
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pthread_mutex_lock(&m);
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while (!signaled)
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pthread_cond_wait(&c, &m);
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pthread_mutex_unlock(&m);
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}
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};
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