From 2a66260e017880b41a1ffb93f7de12e4d4d83f0f Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Sat, 4 Nov 2000 17:59:10 +0100
Subject: [PATCH] rnd-20001104-1-src

---
 CHANGES     |  6 +++++-
 src/init.c  |  2 +-
 src/sound.c | 20 ++++++++++++++++++--
 src/sound.h |  1 +
 4 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/CHANGES b/CHANGES
index bb830209..c8ad050d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,9 @@
+Version 1.5.0
+-------------
+	- SDL!!!
+	- trying to open already busy audio device does not block the game
 
-Release Version 1.3.5 [?? SEP 1999]
+Release Version 1.4.0 [27 OCT 1999]
 -----------------------------------
 	- new Boulderdash elements for better game emulation
 	- new cool medium-sized crystal font
diff --git a/src/init.c b/src/init.c
index 4d3a034d..941881f3 100644
--- a/src/init.c
+++ b/src/init.c
@@ -193,7 +193,7 @@ void InitSound()
     return;
   }
 
-  if ((sound_device = open(sound_device_name,O_WRONLY))<0)
+  if ((sound_device = OpenAudio(sound_device_name)) < 0)
   {
     Error(ERR_WARN, "cannot open sound device - no sounds");
     sound_status = SOUND_OFF;
diff --git a/src/sound.c b/src/sound.c
index 6db2f633..1ab2b8c5 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -54,6 +54,21 @@ static void SoundServer_StopSound(int);
 static void SoundServer_StopAllSounds();
 #endif
 
+int OpenAudio(char *audio_device_name)
+{
+  int audio_fd;
+
+  /* try to open audio device in non-blocking mode */
+  if ((audio_fd = open(audio_device_name, O_WRONLY | O_NONBLOCK)) < 0)
+    return audio_fd;
+
+  /* re-open audio device in blocking mode */
+  close(audio_fd);
+  audio_fd = open(audio_device_name, O_WRONLY);
+
+  return audio_fd;
+}
+
 void SoundServer()
 {
   int i;
@@ -144,7 +159,8 @@ void SoundServer()
       int sample_rate = 22050;
 #endif
 
-      if (playing_sounds || (sound_device=open(sound_device_name,O_WRONLY))>=0)
+      if (playing_sounds ||
+	  (sound_device = OpenAudio(sound_device_name)) >= 0)
       {
 	if (!playing_sounds)	/* we just opened the audio device */
 	{
@@ -306,7 +322,7 @@ void SoundServer()
       int wait_percent = 90;	/* wait 90% of the real playing time */
       int i;
 
-      if ((sound_device=open(sound_device_name,O_WRONLY))>=0)
+      if ((sound_device = OpenAudio(sound_device_name)) >= 0)
       {
 	playing_sounds = 1;
 
diff --git a/src/sound.h b/src/sound.h
index dada0e89..6eb0dad2 100644
--- a/src/sound.h
+++ b/src/sound.h
@@ -160,6 +160,7 @@ struct SoundControl
 };
 
 /* start sound server */
+int OpenAudio(char *);
 void SoundServer(void);
 
 /* client functions */
-- 
2.34.1