Use GCC built-in functions for atomic operations.

ChangeLog

@@ -2,6 +2,7 @@ User johns
 Date:
 
     Config for automatic AES parameters.
+    Use GCC built-in functions for atomic operations.
 
 User master_red
 Date: Wed Jun  4 14:44:32 CEST 2014

audio.c

@@ -88,7 +88,7 @@
 #endif
 #endif
 
-#include <alsa/iatomic.h>		// portable atomic_t
+#include "iatomic.h"			// portable atomic_t
 
 #include "ringbuffer.h"
 #include "misc.h"

codec.c

@@ -58,7 +58,6 @@
 #define _(str) gettext(str)		///< gettext shortcut
 #define _N(str) str			///< gettext_noop shortcut
 
-#include <alsa/iatomic.h>
 #include <libavcodec/avcodec.h>
 #include <libavutil/mem.h>
 // support old ffmpeg versions <1.0
@@ -88,6 +87,7 @@
 #ifdef MAIN_H
 #include MAIN_H
 #endif
+#include "iatomic.h"
 #include "misc.h"
 #include "video.h"
 #include "audio.h"

iatomic.h

@@ -0,0 +1,97 @@
+///
+///	@file iatomic.h @brief Misc function header file
+///
+///	Copyright (c) 2014 by Johns.  All Rights Reserved.
+///
+///	Contributor(s):
+///
+///	License: AGPLv3
+///
+///	This program is free software: you can redistribute it and/or modify
+///	it under the terms of the GNU Affero General Public License as
+///	published by the Free Software Foundation, either version 3 of the
+///	License.
+///
+///	This program is distributed in the hope that it will be useful,
+///	but WITHOUT ANY WARRANTY; without even the implied warranty of
+///	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+///	GNU Affero General Public License for more details.
+///
+///	$Id$
+//////////////////////////////////////////////////////////////////////////////
+
+/// @addtogroup iatomic
+/// @{
+
+#define GCC_VERSION (__GNUC__ * 10000 \
+	+ __GNUC_MINOR__ * 100 \
+	+ __GNUC_PATCHLEVEL__)
+
+//	gcc before 4.7 didn't support atomic builtins,
+//	use alsa atomic functions.
+#if GCC_VERSION < 40700
+
+#include <alsa/iatomic.h>
+
+#else
+
+//////////////////////////////////////////////////////////////////////////////
+//	Defines
+//////////////////////////////////////////////////////////////////////////////
+
+//////////////////////////////////////////////////////////////////////////////
+//	Declares
+//////////////////////////////////////////////////////////////////////////////
+
+///
+///	atomic type, 24 bit useable,
+///
+typedef volatile int atomic_t;
+
+//////////////////////////////////////////////////////////////////////////////
+//	Prototypes
+//////////////////////////////////////////////////////////////////////////////
+
+//////////////////////////////////////////////////////////////////////////////
+//	Inlines
+//////////////////////////////////////////////////////////////////////////////
+
+///
+///	Set atomic value.
+///
+#define atomic_set(ptr, val) \
+    __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST)
+
+///
+///	Read atomic value.
+///
+#define atomic_read(ptr) \
+    __atomic_load_n(ptr, __ATOMIC_SEQ_CST)
+
+///
+///	Increment atomic value.
+///
+#define atomic_inc(ptr) \
+    __atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST)
+
+///
+///	Decrement atomic value.
+///
+#define atomic_dec(ptr) \
+    __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST)
+
+///
+///	Add to atomic value.
+///
+#define atomic_add(val, ptr) \
+    __atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST)
+
+///
+///	Subtract from atomic value.
+///
+#define atomic_sub(val, ptr) \
+    __atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST)
+
+#endif
+
+/// @}

ringbuffer.c

@@ -1,7 +1,7 @@
 ///
 ///	@file ringbuffer.c	@brief Ringbuffer module
 ///
-///	Copyright (c) 2009, 2011  by Johns.  All Rights Reserved.
+///	Copyright (c) 2009, 2011, 2014	by Johns.  All Rights Reserved.
 ///
 ///	Contributor(s):
 ///
@@ -30,8 +30,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <alsa/iatomic.h>
+#include "iatomic.h"
-
 #include "ringbuffer.h"
 
     /// ring buffer structure

softhddev.c

@@ -63,6 +63,7 @@
 #endif
 #include <pthread.h>
 
+#include "iatomic.h"			// portable atomic_t
 #include "misc.h"
 #include "softhddev.h"
 
@@ -1307,8 +1308,6 @@ void SetVolumeDevice(int volume)
 //	Video
 //////////////////////////////////////////////////////////////////////////////
 
-#include <alsa/iatomic.h>		// portable atomic_t
-
 #define VIDEO_BUFFER_SIZE (512 * 1024)	///< video PES buffer default size
 #define VIDEO_PACKET_MAX 192		///< max number of video packets
 

video.c

@@ -70,8 +70,6 @@
 #define _(str) gettext(str)		///< gettext shortcut
 #define _N(str) str			///< gettext_noop shortcut
 
-#include <alsa/iatomic.h>		// portable atomic_t
-
 #ifdef USE_VIDEO_THREAD
 #ifndef __USE_GNU
 #define __USE_GNU
@@ -179,6 +177,7 @@ typedef enum
 #define FFMPEG_BUG1_WORKAROUND		///< get_format bug workaround
 #endif
 
+#include "iatomic.h"			// portable atomic_t
 #include "misc.h"
 #include "video.h"
 #include "audio.h"