Started to implement asset manager for textures.

src/asset_manager.c

@@ -1,11 +1,89 @@
 #include "asset_manager.h"
 
+#include <stdarg.h>
+#include <string.h>
+#include "linked_list.h"
+#include "memory_alloc.h"
+
+asset_t *create_asset(asset_type_t asset_type)
+{
+    asset_t *asset = malloc(sizeof(asset_t));
+
+    asset->type = asset_type;
+    asset->nb_refs = 1;
+
+    return asset;
+}
+
+void destroy_asset(asset_t *asset)
+{
+    free(asset->name);
+
+    switch(asset->type)
+    {
+      case TEXTURE:
+        SDL_DestroyTexture(asset->data.texture);
+
+      default:
+        return;
+    }
+
+    free(asset);
+}
+
 void asset_manager_init(asset_manager_t *asset_manager)
 {
+    linked_list_init(&asset_manager->assets, sizeof(asset_t), (deleter_t)destroy_asset);
 }
 
 void asset_manager_exit(asset_manager_t *asset_manager)
 {
+    linked_list_clear(&asset_manager->assets);
+}
+// Only for this file
+// No args
+static inline bool condition_is_asset_unused(elem_t *elem, va_list args __attribute__((unused)))
+{
+    return !((asset_t *)elem->data)->nb_refs;
+}
+
+inline void asset_manager_collect_garbage(asset_manager_t *asset_manager)
+{
+    linked_list_remove_if(&asset_manager->assets, condition_is_asset_unused);
+}
+
+// Only for this file
+// Arg : const char *asset_name
+static inline bool condition_is_asset_name(elem_t *elem, va_list args)
+{
+    return !strcmp(((asset_t *)elem->data)->name, va_arg(args, const char *));
+}
+
+void asset_manager_load_asset(asset_manager_t *asset_manager, const char *asset_name, asset_type_t asset_type)
+{
+    asset_t *asset = linked_list_get_if(&asset_manager->assets, condition_is_asset_name, asset_name);
+    if(asset)
+    {
+        asset->nb_refs++;
+        return;
+    }
+
+    asset = create_asset(asset_type);
+    asset->name = malloc(strlen(asset_name) + 1);
+    strcpy(asset->name, asset_name);
+
+    // XXX LOAD ASSET FROM FILE XXX
+
+    linked_list_push_back(&asset_manager->assets, asset);
+}
+
+void asset_manager_let_go_asset(asset_manager_t *asset_manager, const char *asset_name)
+{
+    asset_t *asset = linked_list_get_if(&asset_manager->assets, condition_is_asset_name, asset_name);
+    if(asset)
+    {
+        asset->nb_refs--;
+    }
 }
 
 texture_t *asset_manager_get_texture(asset_manager_t *asset_manager, const char *asset_name)

src/headers/asset_manager.h

@@ -8,24 +8,36 @@
 
 typedef SDL_Texture texture_t;
 
+typedef enum asset_type_t {
+    TEXTURE
+} asset_type_t;
+
 typedef struct asset_t {
+    char *name;
+
     union {
         texture_t *texture;
     } data;
 
-    enum {
-        TEXTURE
-    } type;
+    asset_type_t type;
 
     size_t nb_refs;
 } asset_t;
 
+asset_t *create_asset(asset_type_t asset_type);
+
+void destroy_asset(asset_t *asset);
+
 typedef struct asset_manager_t {
     linked_list_t assets;
 } asset_manager_t;
 
 void asset_manager_init(asset_manager_t *asset_manager);
 void asset_manager_exit(asset_manager_t *asset_manager);
+void asset_manager_collect_garbage(asset_manager_t *asset_manager);
+
+void asset_manager_load_asset(asset_manager_t *asset_manager, const char *asset_name, asset_type_t asset_type);
+void asset_manager_let_go_asset(asset_manager_t *asset_manager, const char *asset_name);
 
 texture_t *asset_manager_get_texture(asset_manager_t *asset_manager, const char *asset_name);
 void asset_manager_draw_texture(texture_t *texture, rect_t *src_rect, rect_t *dst_rect, bool flip);