Add condition variable support and reimplement PLT_EVENT with it for non-Win32 platforms

src/PlatformThreads.h

@@ -7,18 +7,14 @@ typedef void(*ThreadEntry)(void* context);
 
 #if defined(LC_WINDOWS)
 typedef SRWLOCK PLT_MUTEX;
-typedef HANDLE PLT_EVENT;
+typedef CONDITION_VARIABLE PLT_COND;
 typedef struct _PLT_THREAD {
     HANDLE handle;
     bool cancelled;
 } PLT_THREAD;
 #elif defined(__vita__)
 typedef int PLT_MUTEX;
-typedef struct _PLT_EVENT {
-    int mutex;
-    int cond;
-    bool signalled;
-} PLT_EVENT;
+typedef int PLT_COND;
 typedef struct _PLT_THREAD {
     int handle;
     int cancelled;
@@ -27,22 +23,14 @@ typedef struct _PLT_THREAD {
 } PLT_THREAD;
 #elif defined(__WIIU__)
 typedef OSFastMutex PLT_MUTEX;
-typedef struct _PLT_EVENT {
-    OSFastMutex mutex;
-    OSFastCondition cond;
-    int signalled;
-} PLT_EVENT;
+typedef OSFastCondition PLT_COND;
 typedef struct _PLT_THREAD {
     OSThread thread;
     int cancelled;
 } PLT_THREAD;
 #elif defined (LC_POSIX)
 typedef pthread_mutex_t PLT_MUTEX;
-typedef struct _PLT_EVENT {
-    pthread_mutex_t mutex;
-    pthread_cond_t cond;
-    bool signalled;
-} PLT_EVENT;
+typedef pthread_cond_t PLT_COND;
 typedef struct _PLT_THREAD {
     pthread_t thread;
     bool cancelled;
@@ -51,6 +39,16 @@ typedef struct _PLT_THREAD {
 #error Unsupported platform
 #endif
 
+#ifdef LC_WINDOWS
+typedef HANDLE PLT_EVENT;
+#else
+typedef struct _PLT_EVENT {
+    PLT_MUTEX mutex;
+    PLT_COND cond;
+    bool signalled;
+} PLT_EVENT;
+#endif
+
 int PltCreateMutex(PLT_MUTEX* mutex);
 void PltDeleteMutex(PLT_MUTEX* mutex);
 void PltLockMutex(PLT_MUTEX* mutex);
@@ -68,6 +66,11 @@ void PltSetEvent(PLT_EVENT* event);
 void PltClearEvent(PLT_EVENT* event);
 int PltWaitForEvent(PLT_EVENT* event);
 
+int PltCreateConditionVariable(PLT_COND* cond, PLT_MUTEX* mutex);
+void PltDeleteConditionVariable(PLT_COND* cond);
+void PltSignalConditionVariable(PLT_COND* cond);
+void PltWaitForConditionVariable(PLT_COND* cond, PLT_MUTEX* mutex);
+
 #define PLT_WAIT_SUCCESS 0
 #define PLT_WAIT_INTERRUPTED 1