Unified multiple definitions of container_of() macro.

Removed duplicate definitions of the container_of() macro and
refactored sources to use the single implementation.

Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>

src/animation.c

@@ -34,6 +34,7 @@
 #include <fcntl.h>
 
 #include "compositor.h"
+#include "shared/helpers.h"
 
 WL_EXPORT void
 weston_spring_init(struct weston_spring *spring,

src/bindings.c

@@ -29,6 +29,7 @@
 #include <linux/input.h>
 
 #include "compositor.h"
+#include "shared/helpers.h"
 
 struct weston_binding {
 	uint32_t key;

src/clipboard.c

@@ -33,6 +33,7 @@
 #include <sys/uio.h>
 
 #include "compositor.h"
+#include "shared/helpers.h"
 
 struct clipboard_source {
 	struct weston_data_source base;

src/cms-colord.c

@@ -36,6 +36,7 @@
 
 #include "compositor.h"
 #include "cms-helper.h"
+#include "shared/helpers.h"
 
 struct cms_colord {
 	struct weston_compositor	*ec;

src/cms-static.c

@@ -30,6 +30,7 @@
 
 #include "compositor.h"
 #include "cms-helper.h"
+#include "shared/helpers.h"
 
 struct cms_static {
 	struct weston_compositor	*ec;

src/compositor.h

@@ -45,10 +45,6 @@ extern "C" {
 #include "zalloc.h"
 #include "timeline-object.h"
 
-#define container_of(ptr, type, member) ({				\
-	const __typeof__( ((type *)0)->member ) *__mptr = (ptr);	\
-	(type *)( (char *)__mptr - offsetof(type,member) );})
-
 struct weston_transform {
 	struct weston_matrix matrix;
 	struct wl_list link;

src/data-device.c

@@ -32,6 +32,7 @@
 #include <assert.h>
 
 #include "compositor.h"
+#include "shared/helpers.h"
 
 struct weston_drag {
 	struct wl_client *client;

src/libinput-device.c

@@ -38,6 +38,7 @@
 
 #include "compositor.h"
 #include "libinput-device.h"
+#include "shared/helpers.h"
 
 #define DEFAULT_AXIS_STEP_DISTANCE wl_fixed_from_int(10)
 

src/libinput-seat.c

@@ -37,6 +37,7 @@
 #include "launcher-util.h"
 #include "libinput-seat.h"
 #include "libinput-device.h"
+#include "shared/helpers.h"
 
 static const char default_seat[] = "seat0";
 static const char default_seat_name[] = "default";

src/pixman-renderer.c

@@ -32,6 +32,7 @@
 #include <assert.h>
 
 #include "pixman-renderer.h"
+#include "shared/helpers.h"
 
 #include <linux/input.h>
 

src/rpi-renderer.c

@@ -37,6 +37,7 @@
 
 #include "compositor.h"
 #include "rpi-renderer.h"
+#include "shared/helpers.h"
 
 #ifdef ENABLE_EGL
 #include <EGL/egl.h>

src/screen-share.c

@@ -40,6 +40,7 @@
 #include <wayland-client.h>
 
 #include "compositor.h"
+#include "shared/helpers.h"
 #include "shared/os-compatibility.h"
 #include "fullscreen-shell-client-protocol.h"
 

src/screenshooter.c

@@ -35,6 +35,7 @@
 
 #include "compositor.h"
 #include "screenshooter-server-protocol.h"
+#include "shared/helpers.h"
 
 #include "wcap/wcap-decode.h"
 

src/text-backend.c

@@ -35,6 +35,7 @@
 #include "compositor.h"
 #include "text-server-protocol.h"
 #include "input-method-server-protocol.h"
+#include "shared/helpers.h"
 
 struct text_input_manager;
 struct input_method;

src/zoom.c

@@ -29,6 +29,7 @@
 
 #include "compositor.h"
 #include "text-cursor-position-server-protocol.h"
+#include "shared/helpers.h"
 
 static void
 weston_zoom_frame_z(struct weston_animation *animation,