output_all: move _lock_signal() to output_control.c

Better name, better documentation.

src/output_all.c

@@ -205,30 +205,14 @@ static void audio_output_wait_all(void)
 		notify_wait(&audio_output_client_notify);
 }
 
-/**
- * Signal the audio output if it is open, and set the "allow_play"
- * flag.  This function locks the mutex.
- */
-static void
-audio_output_lock_signal(struct audio_output *ao)
-{
-	g_mutex_lock(ao->mutex);
-
-	ao->allow_play = true;
-	if (audio_output_is_open(ao))
-		g_cond_signal(ao->cond);
-
-	g_mutex_unlock(ao->mutex);
-}
-
 /**
  * Signals all audio outputs which are open.
  */
 static void
-audio_output_signal_all(void)
+audio_output_allow_play_all(void)
 {
 	for (unsigned i = 0; i < num_audio_outputs; ++i)
-		audio_output_lock_signal(&audio_outputs[i]);
+		audio_output_allow_play(&audio_outputs[i]);
 }
 
 static void
@@ -533,7 +517,7 @@ audio_output_all_cancel(void)
 	/* the audio outputs are now waiting for a signal, to
 	   synchronize the cleared music pipe */
 
-	audio_output_signal_all();
+	audio_output_allow_play_all();
 
 	/* invalidate elapsed_time */
 

src/output_control.c

@@ -267,6 +267,18 @@ void audio_output_cancel(struct audio_output *ao)
 	g_mutex_unlock(ao->mutex);
 }
 
+void
+audio_output_allow_play(struct audio_output *ao)
+{
+	g_mutex_lock(ao->mutex);
+
+	ao->allow_play = true;
+	if (audio_output_is_open(ao))
+		g_cond_signal(ao->cond);
+
+	g_mutex_unlock(ao->mutex);
+}
+
 void
 audio_output_release(struct audio_output *ao)
 {

src/output_control.h

@@ -72,11 +72,17 @@ audio_output_drain_async(struct audio_output *ao);
 
 /**
  * Clear the "allow_play" flag and send the "CANCEL" command
- * asynchronously.  To finish the operation, the caller has to set the
- * "allow_play" flag and signal the thread.
+ * asynchronously.  To finish the operation, the caller has to call
+ * audio_output_allow_play().
  */
 void audio_output_cancel(struct audio_output *ao);
 
+/**
+ * Set the "allow_play" and signal the thread.
+ */
+void
+audio_output_allow_play(struct audio_output *ao);
+
 void audio_output_close(struct audio_output *ao);
 
 /**