[retro-gtk] core: Move Core.prepare() to C

[Adrien Plazas <aplazas src gnome org>]

commit 81abe41c31b09aca0136a26738eeb3538c48b003
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu Jul 6 11:39:44 2017 +0200

    core: Move Core.prepare() to C
    
    This help porting the library to C.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777489

 retro-gtk/core.vala    |   13 ++-----------
 retro-gtk/retro-core.c |   21 +++++++++++++++++++++
 retro-gtk/retro-core.h |    2 ++
 3 files changed, 25 insertions(+), 11 deletions(-)
---
diff --git a/retro-gtk/core.vala b/retro-gtk/core.vala
index 96ec318..65f8dce 100644
--- a/retro-gtk/core.vala
+++ b/retro-gtk/core.vala
@@ -138,7 +138,7 @@ public class Core : Object {
        /**
         * Whether or not the a game is loaded.
         */
-       public bool game_loaded { private set; get; default = false; }
+       public bool game_loaded { internal set; get; default = false; }
 
        /**
         * Whether or not the core supports games.
@@ -334,16 +334,7 @@ public class Core : Object {
         *
         * @return false if the preparation failed, true otherwise
         */
-       public bool prepare () {
-               push_cb_data ();
-               game_loaded = module.load_game (null);
-               SystemAvInfo info;
-               module.get_system_av_info (out info);
-               set_system_av_info (info);
-               pop_cb_data ();
-
-               return game_loaded;
-       }
+       public extern bool prepare ();
 
        /**
         * Gets the size of a region of memory.
diff --git a/retro-gtk/retro-core.c b/retro-gtk/retro-core.c
index 8ebc77d..aad0e82 100644
--- a/retro-gtk/retro-core.c
+++ b/retro-gtk/retro-core.c
@@ -242,6 +242,27 @@ retro_core_deserialize_state (RetroCore  *self,
   }
 }
 
+gboolean
+retro_core_prepare (RetroCore* self) {
+  RetroLoadGame load_game;
+  RetroGetSystemAvInfo get_system_av_info;
+  gboolean game_loaded;
+  RetroSystemAvInfo info = {{ 0 }};
+
+  g_return_val_if_fail (self != NULL, FALSE);
+
+  retro_core_push_cb_data (self);
+  load_game = retro_module_get_load_game (self->module);
+  game_loaded = load_game (NULL);
+  retro_core_set_game_loaded (self, game_loaded);
+  get_system_av_info = retro_module_get_get_system_av_info (self->module);
+  get_system_av_info (&info);
+  retro_core_set_system_av_info (self, &info);
+  retro_core_pop_cb_data ();
+
+  return game_loaded;
+}
+
 gsize
 retro_core_get_memory_size (RetroCore       *self,
                             RetroMemoryType  id)
diff --git a/retro-gtk/retro-core.h b/retro-gtk/retro-core.h
index 2d38266..c645d4f 100644
--- a/retro-gtk/retro-core.h
+++ b/retro-gtk/retro-core.h
@@ -25,6 +25,8 @@ struct _RetroCoreEnvironmentInternal {
   RetroKeyboardCallback keyboard_callback;
 };
 
+void retro_core_set_system_av_info (RetroCore         *self,
+                                    RetroSystemAvInfo *system_av_info);
 void retro_core_set_controller_port_device (RetroCore       *self,
                                             guint            port,
                                             RetroDeviceType  device);