File 0058-core-add-convenience-macros-to-local.h.patch of Package alsa

From ab9633d581110a5da08bd2d2c7c070f3862fe9af Mon Sep 17 00:00:00 2001
From: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Date: Tue, 11 Aug 2015 18:23:15 +0100
Subject: [PATCH] core: add convenience macros to local.h

Move ARRAY_SIZE() from tplg_local.h to local.h and add container_of()
macro to local.h. Both macros are generic but are initially used by
topology.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 include/local.h           | 7 +++++++
 src/topology/tplg_local.h | 1 -
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/local.h b/include/local.h
index 660081638a1c..b429f5d0094c 100644
--- a/include/local.h
+++ b/include/local.h
@@ -350,4 +350,11 @@ int snd_config_search_alias_hooks(snd_config_t *config,
 
 int _snd_conf_generic_id(const char *id);
 
+/* convenience macros */
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+#define container_of(ptr, type, member) ({                      \
+	 const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+	(type *)( (char *)__mptr - offsetof(type,member) );})
+
 #endif
diff --git a/src/topology/tplg_local.h b/src/topology/tplg_local.h
index febc1772fd04..3982cc70dce5 100644
--- a/src/topology/tplg_local.h
+++ b/src/topology/tplg_local.h
@@ -32,7 +32,6 @@
 #define MAX_FILE		256
 #define TPLG_MAX_PRIV_SIZE	(1024 * 128)
 #define ALSA_TPLG_DIR	ALSA_CONFIG_DIR "/topology"
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 
 /** The name of the environment variable containing the tplg directory */
 #define ALSA_CONFIG_TPLG_VAR "ALSA_CONFIG_TPLG"
-- 
2.5.3