From 0be5a6ab2b9201e60f3ecb363fcc9342ecfa8aee Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Wed, 6 Nov 2013 23:10:05 +0100
Subject: DecoderControl: reduce the number of PlayerThread wakeups

Wake up the PlayerThread only if it is really waiting for the decoder.
This greatly reduces the number of system calls in the DecoderThread.
---
 src/DecoderInternal.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/DecoderInternal.cxx')

diff --git a/src/DecoderInternal.cxx b/src/DecoderInternal.cxx
index 7cca5dbe3..e18fd2b6a 100644
--- a/src/DecoderInternal.cxx
+++ b/src/DecoderInternal.cxx
@@ -102,6 +102,7 @@ decoder_flush_chunk(Decoder &decoder)
 	decoder.chunk = nullptr;
 
 	dc.Lock();
-	dc.client_cond.signal();
+	if (dc.client_is_waiting)
+		dc.client_cond.signal();
 	dc.Unlock();
 }
-- 
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