#endif
+#define USE_WIN32_CONDITION_VARIABLES 0
+
+
/**
* Compiler TLS.
*
*/
class condition_variable
{
- public:
+ private:
#ifdef _WIN32
+# if USE_WIN32_CONDITION_VARIABLES
+ // XXX: Only supported on Vista an higher. Not yet supported by WINE.
typedef CONDITION_VARIABLE native_handle_type;
+ native_handle_type _native_handle;
+#else
+ // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
+ LONG cWaiters;
+ HANDLE hEvent;
+#endif
#else
typedef pthread_cond_t native_handle_type;
+ native_handle_type _native_handle;
#endif
+ public:
condition_variable() {
#ifdef _WIN32
+# if USE_WIN32_CONDITION_VARIABLES
InitializeConditionVariable(&_native_handle);
+# else
+ cWaiters = 0;
+ hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
+# endif
#else
pthread_cond_init(&_native_handle, NULL);
#endif
~condition_variable() {
#ifdef _WIN32
+# if USE_WIN32_CONDITION_VARIABLES
/* No-op */
+# else
+ CloseHandle(hEvent);
+# endif
#else
pthread_cond_destroy(&_native_handle);
#endif
inline void
signal(void) {
#ifdef _WIN32
+# if USE_WIN32_CONDITION_VARIABLES
WakeConditionVariable(&_native_handle);
+# else
+ if (cWaiters) {
+ SetEvent(hEvent);
+ }
+# endif
#else
pthread_cond_signal(&_native_handle);
#endif
wait(unique_lock<mutex> & lock) {
mutex::native_handle_type & mutex_native_handle = lock.mutex()->native_handle();
#ifdef _WIN32
+# if USE_WIN32_CONDITION_VARIABLES
SleepConditionVariableCS(&_native_handle, &mutex_native_handle, INFINITE);
+# else
+ InterlockedIncrement(&cWaiters);
+ LeaveCriticalSection(&mutex_native_handle);
+ WaitForSingleObject(hEvent, INFINITE);
+ EnterCriticalSection(&mutex_native_handle);
+ InterlockedDecrement(&cWaiters);
+# endif
#else
pthread_cond_wait(&_native_handle, &mutex_native_handle);
#endif
}
-
- protected:
- native_handle_type _native_handle;
};
}
inline
- thread(thread &other) :
+ thread(const thread &other) :
_native_handle(other._native_handle)
{
}
DWORD id = 0;
_native_handle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)f, (LPVOID)arg, 0, &id);
#else
- pthread_create(&_native_handle, NULL, ( void *(*) (void *))f, arg);
+ pthread_create(&_native_handle, NULL, (void *(*) (void *))f, (void *)arg);
#endif
}