Add a way to benchmark sem_t on Unix too

It's closer to what we do with in QMutex than pthread_mutex_lock.

Change-Id: I86498a800b69b684bf096912e911bc5bca219727
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp b/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp
index 12420e25a1..ab668f9388 100644
--- a/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp
+++ b/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp
@@ -44,7 +44,10 @@
 
 #include <math.h>
 
+//#define USE_SEM_T
+
 #if defined(Q_OS_UNIX)
+#if !defined(USE_SEM_T)
 #  include <pthread.h>
 #  include <errno.h>
 typedef pthread_mutex_t NativeMutexType;
@@ -64,6 +67,26 @@ void NativeMutexUnlock(NativeMutexType *mutex)
 {
     pthread_mutex_unlock(mutex);
 }
+#else
+#  include <semaphore.h>
+typedef sem_t NativeMutexType;
+void NativeMutexInitialize(NativeMutexType *mutex)
+{
+    sem_init(mutex, false, 1);
+}
+void NativeMutexDestroy(NativeMutexType *mutex)
+{
+    sem_destroy(mutex);
+}
+void NativeMutexLock(NativeMutexType *mutex)
+{
+    sem_wait(mutex);
+}
+void NativeMutexUnlock(NativeMutexType *mutex)
+{
+    sem_post(mutex);
+}
+#endif
 #elif defined(Q_OS_WIN)
 #  define _WIN32_WINNT 0x0400
 #  include <windows.h>