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// RUN: %clangxx -O1 %s -o %t && %run %t
// RUN: %clangxx -O1 -DUSE_GLIBC %s -o %t && %run %t
// UNSUPPORTED: android
#include <pthread.h>
#ifdef USE_GLIBC
extern "C" int __pthread_mutex_lock(pthread_mutex_t *__mutex);
extern "C" int __pthread_mutex_unlock(pthread_mutex_t *__mutex);
#define LOCK __pthread_mutex_lock
#define UNLOCK __pthread_mutex_unlock
#else
#define LOCK pthread_mutex_lock
#define UNLOCK pthread_mutex_unlock
#endif
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
int x;
static void *Start(void *arg) {
LOCK(&m);
++x;
UNLOCK(&m);
return nullptr;
}
int main() {
pthread_t threads[2] = {};
for (pthread_t &t : threads)
pthread_create(&t, 0, &Start, 0);
for (pthread_t &t : threads)
pthread_join(t, 0);
return 0;
}
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