player/Control: use class ScopeLock

src/player/Control.cxx

@@ -54,7 +54,7 @@ PlayerControl::Play(DetachedSong *song)
 {
 	assert(song != nullptr);
 
-	Lock();
+	const ScopeLock protect(mutex);
 
 	if (state != PlayerState::STOP)
 		SynchronousCommand(PlayerCommand::STOP);
@@ -64,8 +64,6 @@ PlayerControl::Play(DetachedSong *song)
 	EnqueueSongLocked(song);
 
 	assert(next_song == nullptr);
-
-	Unlock();
 }
 
 void
@@ -113,15 +111,14 @@ PlayerControl::PauseLocked()
 void
 PlayerControl::LockPause()
 {
-	Lock();
+	const ScopeLock protect(mutex);
 	PauseLocked();
-	Unlock();
 }
 
 void
 PlayerControl::LockSetPause(bool pause_flag)
 {
-	Lock();
+	const ScopeLock protect(mutex);
 
 	switch (state) {
 	case PlayerState::STOP:
@@ -137,16 +134,13 @@ PlayerControl::LockSetPause(bool pause_flag)
 			PauseLocked();
 		break;
 	}
-
-	Unlock();
 }
 
 void
 PlayerControl::LockSetBorderPause(bool _border_pause)
 {
-	Lock();
+	const ScopeLock protect(mutex);
 	border_pause = _border_pause;
-	Unlock();
 }
 
 player_status
@@ -154,7 +148,7 @@ PlayerControl::LockGetStatus()
 {
 	player_status status;
 
-	Lock();
+	const ScopeLock protect(mutex);
 	SynchronousCommand(PlayerCommand::REFRESH);
 
 	status.state = state;
@@ -166,8 +160,6 @@ PlayerControl::LockGetStatus()
 		status.elapsed_time = elapsed_time;
 	}
 
-	Unlock();
-
 	return status;
 }
 
@@ -184,18 +176,16 @@ PlayerControl::SetError(PlayerError type, Error &&_error)
 void
 PlayerControl::LockClearError()
 {
-	Lock();
+	const ScopeLock protect(mutex);
 	ClearError();
-	Unlock();
 }
 
 void
 PlayerControl::LockSetTaggedSong(const DetachedSong &song)
 {
-	Lock();
+	const ScopeLock protect(mutex);
 	delete tagged_song;
 	tagged_song = new DetachedSong(song);
-	Unlock();
 }
 
 void
@@ -210,9 +200,8 @@ PlayerControl::LockEnqueueSong(DetachedSong *song)
 {
 	assert(song != nullptr);
 
-	Lock();
+	const ScopeLock protect(mutex);
 	EnqueueSongLocked(song);
-	Unlock();
 }
 
 void
@@ -237,9 +226,10 @@ PlayerControl::LockSeek(DetachedSong *song, SongTime t)
 {
 	assert(song != nullptr);
 
-	Lock();
-	SeekLocked(song, t);
-	Unlock();
+	{
+		const ScopeLock protect(mutex);
+		SeekLocked(song, t);
+	}
 
 	idle_add(IDLE_PLAYER);
 

src/player/Control.hxx

@@ -210,9 +210,8 @@ struct PlayerControl {
 	 * this function.
 	 */
 	void LockSignal() {
-		Lock();
+		const ScopeLock protect(mutex);
 		Signal();
-		Unlock();
 	}
 
 	/**
@@ -264,9 +263,8 @@ struct PlayerControl {
 	}
 
 	void LockCommandFinished() {
-		Lock();
+		const ScopeLock protect(mutex);
 		CommandFinished();
-		Unlock();
 	}
 
 private:
@@ -304,9 +302,8 @@ private:
 	 * object.
 	 */
 	void LockSynchronousCommand(PlayerCommand cmd) {
-		Lock();
+		const ScopeLock protect(mutex);
 		SynchronousCommand(cmd);
-		Unlock();
 	}
 
 public:
@@ -377,10 +374,8 @@ public:
 	 */
 	gcc_pure
 	Error LockGetError() const {
-		Lock();
-		Error result = GetError();
-		Unlock();
-		return result;
+		const ScopeLock protect(mutex);
+		return GetError();
 	}
 
 	void LockClearError();
@@ -412,10 +407,8 @@ public:
 	 * Like ReadTaggedSong(), but locks and unlocks the object.
 	 */
 	DetachedSong *LockReadTaggedSong() {
-		Lock();
-		DetachedSong *result = ReadTaggedSong();
-		Unlock();
-		return result;
+		const ScopeLock protect(mutex);
+		return ReadTaggedSong();
 	}
 
 	void LockStop();