compiler-rt/test/sanitizer_common/TestCases/Linux/pthread_mutex.cpp

   1 // RUN: %clangxx -O1 %s -o %t && %run %t
   2 // RUN: %clangxx -O1 -DUSE_GLIBC %s -o %t && %run %t
   3 // UNSUPPORTED: android
   4
   5 #include <pthread.h>
   6
   7 #if !defined(__GLIBC_PREREQ)
   8 #define __GLIBC_PREREQ(a, b) 0
   9 #endif
  10
  11 #if defined(USE_GLIBC) && !__GLIBC_PREREQ(2, 34)
  12 // They were removed from GLIBC 2.34
  13 extern "C" int __pthread_mutex_lock(pthread_mutex_t *__mutex);
  14 extern "C" int __pthread_mutex_unlock(pthread_mutex_t *__mutex);
  15 #define LOCK __pthread_mutex_lock
  16 #define UNLOCK __pthread_mutex_unlock
  17 #else
  18 #define LOCK pthread_mutex_lock
  19 #define UNLOCK pthread_mutex_unlock
  20 #endif
  21
  22 pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
  23 int x;
  24
  25 static void *Start(void *arg) {
  26   LOCK(&m);
  27   ++x;
  28   UNLOCK(&m);
  29   return nullptr;
  30 }
  31
  32 int main() {
  33   pthread_t threads[2] = {};
  34   for (pthread_t &t : threads)
  35     pthread_create(&t, 0, &Start, 0);
  36   for (pthread_t &t : threads)
  37     pthread_join(t, 0);
  38   return 0;
  39 }