[PATCH 1/9] core: Add references counter to GrlMediaSourceFooSpec structures

["Juan A. Suarez Romero" <jasuarez igalia com>]

Heavily inspired by GHashTable, add references counters to these
specifications, so later we can add _ref() and _unref() methods.
---
 src/grl-media-source.h |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/src/grl-media-source.h b/src/grl-media-source.h
index bc167c0..d275876 100644
--- a/src/grl-media-source.h
+++ b/src/grl-media-source.h
@@ -153,6 +153,7 @@ typedef void (*GrlMediaSourceRemoveCb) (GrlMediaSource *source,
  * @flags: the resolution mode
  * @callback: the user defined callback
  * @user_data: the user data to pass in the callback
+ * @ref_count: references counter
  *
  * Data transport structure used internally by the plugins which support
  * browse vmethod.
@@ -167,6 +168,7 @@ typedef struct {
   GrlMetadataResolutionFlags flags;
   GrlMediaSourceResultCb callback;
   gpointer user_data;
+  volatile gint ref_count;
 } GrlMediaSourceBrowseSpec;
 
 /**
@@ -180,6 +182,7 @@ typedef struct {
  * @flags: the resolution mode
  * @callback: the user defined callback
  * @user_data: the user data to pass in the callback
+ * @ref_count: references counter
  *
  * Data transport structure used internally by the plugins which support
  * search vmethod.
@@ -194,6 +197,7 @@ typedef struct {
   GrlMetadataResolutionFlags flags;
   GrlMediaSourceResultCb callback;
   gpointer user_data;
+  volatile gint ref_count;
 } GrlMediaSourceSearchSpec;
 
 /**
@@ -207,6 +211,7 @@ typedef struct {
  * @flags: the resolution mode
  * @callback: the user defined callback
  * @user_data: the user data to pass in the callback
+ * @ref_count: references counter
  *
  * Data transport structure used internally by the plugins which support
  * query vmethod.
@@ -221,6 +226,7 @@ typedef struct {
   GrlMetadataResolutionFlags flags;
   GrlMediaSourceResultCb callback;
   gpointer user_data;
+  volatile gint ref_count;
 } GrlMediaSourceQuerySpec;
 
 /**
@@ -231,6 +237,7 @@ typedef struct {
  * @flags: the resolution mode
  * @callback: the user defined callback
  * @user_data: the user data to pass in the callback
+ * @ref_count: references counter
  *
  * Data transport structure used internally by the plugins which support
  * metadata vmethod.
@@ -242,6 +249,7 @@ typedef struct {
   GrlMetadataResolutionFlags flags;
   GrlMediaSourceMetadataCb callback;
   gpointer user_data;
+  volatile gint ref_count;
 } GrlMediaSourceMetadataSpec;
 
 /**
@@ -251,6 +259,7 @@ typedef struct {
  * @media: a data transfer object
  * @callback: the user defined callback
  * @user_data: the user data to pass in the callback
+ * @ref_count: references counter
  *
  * Data transport structure used internally by the plugins which support
  * store vmethod.
@@ -261,6 +270,7 @@ typedef struct {
   GrlMedia *media;
   GrlMediaSourceStoreCb callback;
   gpointer user_data;
+  volatile gint ref_count;
 } GrlMediaSourceStoreSpec;
 
 /**
@@ -270,6 +280,7 @@ typedef struct {
  * @media: a data transfer object
  * @callback: the user defined callback
  * @user_data: the user data to pass in the callback
+ * @ref_count: references counter
  *
  * Data transport structure used internally by the plugins which support
  * store vmethod.
@@ -280,6 +291,7 @@ typedef struct {
   GrlMedia *media;
   GrlMediaSourceRemoveCb callback;
   gpointer user_data;
+  volatile gint ref_count;
 } GrlMediaSourceRemoveSpec;
 
 /* GrlMediaSource class */
-- 
1.7.0.4