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

[Adrien Plazas <aplazas src gnome org>]

commit 1b7f57d2aa88912e6f5246e9464433ad4a83c9df
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu Jul 6 11:01:19 2017 +0200

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

 retro-gtk/core.vala    |    8 +-------
 retro-gtk/retro-core.c |   17 +++++++++++++++++
 2 files changed, 18 insertions(+), 7 deletions(-)
---
diff --git a/retro-gtk/core.vala b/retro-gtk/core.vala
index c0b875b..96ec318 100644
--- a/retro-gtk/core.vala
+++ b/retro-gtk/core.vala
@@ -351,13 +351,7 @@ public class Core : Object {
         * @param id the region of memory
         * @return the size of the region of memory
         */
-       public size_t get_memory_size (MemoryType id) {
-               push_cb_data ();
-               var result = module.get_memory_size (id);
-               pop_cb_data ();
-
-               return result;
-       }
+       public extern size_t get_memory_size (MemoryType id);
 
        /**
         * Gets a region of memory.
diff --git a/retro-gtk/retro-core.c b/retro-gtk/retro-core.c
index ff691d2..8ebc77d 100644
--- a/retro-gtk/retro-core.c
+++ b/retro-gtk/retro-core.c
@@ -242,6 +242,23 @@ retro_core_deserialize_state (RetroCore  *self,
   }
 }
 
+gsize
+retro_core_get_memory_size (RetroCore       *self,
+                            RetroMemoryType  id)
+{
+  gsize size;
+  RetroGetMemorySize get_memory_size;
+
+  g_return_val_if_fail (self != NULL, 0UL);
+
+  retro_core_push_cb_data (self);
+  get_memory_size = retro_module_get_get_memory_size (self->module);
+  size = get_memory_size (id);
+  retro_core_pop_cb_data ();
+
+  return size;
+}
+
 guint8 *
 retro_core_get_memory (RetroCore       *self,
                        RetroMemoryType  id,