malloc/free errors wat

Makefile

@@ -2,21 +2,37 @@ SDLFLAGS_CC:=$(shell PKG_CONFIG_PATH=~/local/lib/pkgconfig pkg-config sdl3 --cfl
 SDLFLAGS_LD:=$(shell PKG_CONFIG_PATH=~/local/lib/pkgconfig pkg-config sdl3 --libs) -lSDL3_image -lSDL3_mixer
 CC:=$(shell which gcc)
 LD:=$(shell which ld)
+SRCFILES:=$(shell find src -type f -name '*.c')
+OBJFILES:=$(patsubst %.c,%.o,$(SRCFILES))
+PREPFILES:=$(patsubst %.c,%.E,$(SRCFILES))
+ASMFILES:=$(patsubst %.c,%.S,$(SRCFILES))
+
 
 CFLAGS:=-ggdb -gstabs
 
-OBJECTS:=src/util.o src/assets.o src/draw.o src/game.o src/physics.o src/json_helpers.o src/tilemap.o src/sprite.o src/sdl3-gametest.o
 DISTFILE:=dist/sdl3-gametest
 
 .PHONY: clean
+.PHONY: preprocessor
+.PHONY: assembler
 
 all: $(DISTFILE)
 
+preprocessor: $(PREPFILES)
+
+assembler: $(ASMFILES)
+
 clean:
-	rm -f src/*.o ${DISTFILE}
+	rm -f $(OBJFILES) $(PREPFILES) $(ASMFILES) ${DISTFILE}
+
+src/%.S: src/%.c
+	$(CC) -S -o $@ $(CFLAGS) $(SDLFLAGS_CC) $?
+
+src/%.E: src/%.c
+	$(CC) -E -o $@ $(CFLAGS) $(SDLFLAGS_CC) $?
 
 src/%.o: src/%.c
 	$(CC) -c -o $@ $(CFLAGS) $(SDLFLAGS_CC) $?
 
-$(DISTFILE): $(OBJECTS)
+$(DISTFILE): $(OBJFILES)
 	$(CC) -o $@ $^ -lexc -lbox2d -ljansson -lhashmap -lm $(SDLFLAGS_LD)

src/heap.c

@@ -0,0 +1,152 @@
+#include <stdlib.h>
+#include <aklabs/exclib.h>
+
+#include "game.h"
+#include "sprite.h"
+#include "heap.h"
+#include "registry.h"
+
+actor HEAP_ACTOR[MAX_HEAP_ACTOR];
+sprite HEAP_SPRITE[MAX_HEAP_SPRITE];
+spritesheet HEAP_SPRITESHEET[MAX_HEAP_SPRITESHEET];
+character HEAP_CHARACTER[MAX_HEAP_CHARACTER];
+string HEAP_STRING[MAX_HEAP_STRING];
+
+void heap_init()
+{
+    int i = 0;
+    for ( i = 0; i < MAX_HEAP_ACTOR; i++) {
+	memset(&HEAP_ACTOR[i], 0x00, sizeof(actor));
+    }
+    for ( i = 0; i < MAX_HEAP_SPRITE; i++) {
+	memset(&HEAP_SPRITE[i], 0x00, sizeof(sprite));
+    }
+    for ( i = 0; i < MAX_HEAP_SPRITESHEET; i++) {
+	memset(&HEAP_SPRITESHEET[i], 0x00, sizeof(spritesheet));
+    }
+    for ( i = 0; i < MAX_HEAP_CHARACTER; i++) {
+	memset(&HEAP_CHARACTER[i], 0x00, sizeof(character));
+    }
+    for ( i = 0; i < MAX_HEAP_STRING; i++) {
+	memset(&HEAP_STRING[i], 0x00, sizeof(string));
+    }
+}
+
+actor *heap_next_actor()
+{
+    for (int i = 0; i < MAX_HEAP_ACTOR; i++ ) {
+	if ( HEAP_ACTOR[i].refcount != 0 ) {
+	    continue;
+	}
+	return &HEAP_ACTOR[i];
+    }
+    THROW(EXC_HEAPERROR, "Unable to find unused actor on the heap");
+}
+
+sprite *heap_next_sprite()
+{
+    for (int i = 0; i < MAX_HEAP_SPRITE; i++ ) {
+	if ( HEAP_SPRITE[i].refcount != 0 ) {
+	    continue;
+	}
+	return &HEAP_SPRITE[i];
+    }
+    THROW(EXC_HEAPERROR, "Unable to find unused sprite on the heap");
+}
+
+spritesheet *heap_next_spritesheet()
+{
+    for (int i = 0; i < MAX_HEAP_SPRITESHEET; i++ ) {
+	if ( HEAP_SPRITESHEET[i].refcount != 0 ) {
+	    continue;
+	}
+	return &HEAP_SPRITESHEET[i];
+    }
+    THROW(EXC_HEAPERROR, "Unable to find unused spritesheet on the heap");
+}
+
+character *heap_next_character()
+{
+    for (int i = 0; i < MAX_HEAP_CHARACTER; i++ ) {
+	if ( HEAP_CHARACTER[i].refcount != 0 ) {
+	    continue;
+	}
+	return &HEAP_CHARACTER[i];
+    }
+    THROW(EXC_HEAPERROR, "Unable to find unused character on the heap");
+}
+
+string *heap_next_string()
+{
+    for (int i = 0; i < MAX_HEAP_STRING; i++ ) {
+	if ( HEAP_STRING[i].refcount != 0 ) {
+	    continue;
+	}
+	return &HEAP_STRING[i];
+    }
+    THROW(EXC_HEAPERROR, "Unable to find unused string on the heap");  
+}
+
+void heap_release_actor(actor *ptr)
+{
+    THROW_ZERO(ptr, EXC_NULLPOINTER, "NULL character reference");
+    if ( ptr->refcount > 0 ) {
+      ptr->refcount -= 1;
+    }
+    if ( ptr->refcount == 0 ) {
+	heap_release_character(ptr->basechar);
+	SDL_ClearProperty(REGISTRY_ACTOR, (char *)&ptr->name);
+    }
+}
+
+void heap_release_character(character *basechar)
+{
+    iterator opflags;
+    THROW_ZERO(basechar, EXC_NULLPOINTER, "NULL character reference");
+    BITMASK_CLEAR(opflags.flags);
+    BITMASK_ADD(opflags.flags, ITERATOR_OP_RELEASE);
+  
+    if ( basechar->refcount > 0 ) {
+      basechar->refcount -= 1;
+    }
+    if ( basechar->refcount == 0 ) {
+	SDL_EnumerateProperties(basechar->state_sprites, &character_state_sprites_iterate, (void *)&opflags);
+	SDL_ClearProperty(REGISTRY_CHARACTER, (char *)&basechar->name);
+    }
+}
+
+void heap_release_sprite(sprite *ptr)
+{
+    THROW_ZERO(ptr, EXC_NULLPOINTER, "Received NULL sprite reference");
+    if ( ptr->refcount > 0 ) {
+      ptr->refcount -= 1;
+    }
+    if ( ptr->refcount == 0 ) {
+	heap_release_spritesheet(ptr->sheet);
+	SDL_ClearProperty(REGISTRY_SPRITE, (char *)&ptr->name);
+    }
+}
+
+void heap_release_spritesheet(spritesheet *ptr)
+{
+    THROW_ZERO(ptr, EXC_NULLPOINTER, "Received NULL spritesheet reference");
+    if ( ptr->refcount > 0 ) {
+      ptr->refcount -= 1;
+    }
+    if ( ptr->refcount == 0 ) {
+	// TODO : If we go threaded, make sure this is only happening on the main thread
+	SDL_DestroyTexture(ptr->texture);
+	SDL_ClearProperty(REGISTRY_CHARACTER, (char *)&ptr->name);
+    }
+}
+
+void heap_release_string(string *ptr)
+{
+    THROW_ZERO(ptr, EXC_NULLPOINTER, "Received NULL spritesheet reference");
+    if ( ptr->refcount > 0 ) {
+      ptr->refcount -= 1;
+    }
+    if ( ptr->refcount == 0 ) {
+      memset(ptr->data, 0x00, MAX_STRING_LENGTH);
+    }  
+}

src/heap.h

@@ -0,0 +1,31 @@
+#ifndef _HEAP_H_
+#define _HEAP_H_
+
+#include "sprite.h"
+#include "string.h"
+
+#define MAX_HEAP_ACTOR                    64
+#define MAX_HEAP_SPRITE                   (MAX_HEAP_ACTOR * 16)
+#define MAX_HEAP_SPRITESHEET              MAX_HEAP_SPRITE
+#define MAX_HEAP_CHARACTER                256
+#define MAX_HEAP_STRING                   256
+
+extern actor HEAP_ACTOR[MAX_HEAP_ACTOR];
+extern sprite HEAP_SPRITE[MAX_HEAP_SPRITE];
+extern spritesheet HEAP_SPRITESHEET[MAX_HEAP_SPRITESHEET];
+extern character HEAP_CHARACTER[MAX_HEAP_CHARACTER];
+extern string HEAP_STRING[MAX_HEAP_STRING];
+
+void heap_init();
+actor *heap_next_actor();
+sprite *heap_next_sprite();
+spritesheet *heap_next_spritesheet();
+character *heap_next_character();
+string *heap_next_string();
+void heap_release_actor(actor *ptr);
+void heap_release_sprite(sprite *ptr);
+void heap_release_spritesheet(spritesheet *ptr);
+void heap_release_character(character *ptr);
+void heap_release_string(string *ptr);
+
+#endif //_HEAP_H_

src/registry.c

@@ -0,0 +1,32 @@
+#include <aklabs/exclib.h>
+#include "sprite.h"
+#include "registry.h"
+
+SDL_PropertiesID REGISTRY_ACTOR;
+SDL_PropertiesID REGISTRY_SPRITE;
+SDL_PropertiesID REGISTRY_SPRITESHEET;
+SDL_PropertiesID REGISTRY_CHARACTER;
+
+void registry_init_actor()
+{
+    REGISTRY_ACTOR = SDL_CreateProperties();
+    THROW_ZERO(REGISTRY_ACTOR, EXC_NULLPOINTER, "Error initializing actor registry");
+}
+
+void registry_init_sprite()
+{
+    REGISTRY_SPRITE = SDL_CreateProperties();
+    THROW_ZERO(REGISTRY_SPRITE, EXC_NULLPOINTER, "Error initializing sprite registry");
+}
+
+void registry_init_spritesheet()
+{
+    REGISTRY_SPRITESHEET = SDL_CreateProperties();
+    THROW_ZERO(REGISTRY_SPRITESHEET, EXC_NULLPOINTER, "Error initializing spritesheet registry");
+}
+
+void registry_init_character()
+{
+    REGISTRY_CHARACTER = SDL_CreateProperties();
+    THROW_ZERO(REGISTRY_CHARACTER, EXC_NULLPOINTER, "Error initializing character registry");
+}

src/registry.h

@@ -0,0 +1,16 @@
+#ifndef _REGISTRY_H_
+#define _REGISTRY_H_
+
+extern SDL_PropertiesID REGISTRY_ACTOR;
+extern SDL_PropertiesID REGISTRY_SPRITE;
+extern SDL_PropertiesID REGISTRY_SPRITESHEET;
+extern SDL_PropertiesID REGISTRY_CHARACTER;
+
+void registry_init_actor();
+void registry_iterate_actor(void *userdata, SDL_PropertiesID registry, const char *name);
+void registry_init_sprite();
+void registry_init_spritesheet();
+void registry_init_character();
+
+
+#endif //_REGISTRY_H_

src/sdl3-gametest.c

@@ -13,6 +13,8 @@
 #include "draw.h"
 #include "assets.h"
 #include "sprite.h"
+#include "heap.h"
+#include "registry.h"
 
 SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
 {

src/sdl3-pong.c

@@ -1,139 +0,0 @@
-#define SDL_MAIN_USE_CALLBACKS
-#include <SDL3/SDL.h>
-#include <SDL3/SDL_main.h>
-#include <SDL3_image/SDL_image.h>
-#include <SDL3_mixer/SDL_mixer.h>
-#include <aklabs/exclib.h>
-#include <box2d/box2d.h>
-
-#include "game.h"
-#include "physics.h"
-#include "draw.h"
-#include "assets.h"
-
-SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
-{
-  SDL_AudioSpec spec;
-  /* Initialize variables */
-  spec.freq = MIX_DEFAULT_FREQUENCY;
-  spec.format = MIX_DEFAULT_FORMAT;
-  spec.channels = MIX_DEFAULT_CHANNELS;
-
-  exclib_name_exception(EXC_SDL_INIT, "SDL Initialization Failure");
-  exclib_name_exception(EXC_SDL_MUSICMIXER, "SDL Music Mixer Failure");
-
-  SDL_SetAppMetadata("SDL3-Pong", "0.1", "net.aklabs.sdl3-pong");
-
-  if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO )) {
-    SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
-    return SDL_APP_FAILURE;
-  }
-  
-  if (!SDL_CreateWindowAndRenderer("net/aklabs/sdl3-pong", 640, 480, 0, &window, &renderer)) {
-    SDL_Log("Couldn't create window/renderer: %s", SDL_GetError());
-    return SDL_APP_FAILURE;
-  }
-
-  GAME_init_physics();
-  
-  if (!Mix_OpenAudio(0, &spec)) {
-    SDL_Log("Couldn't initialize the audio subsystem: %s", SDL_GetError());
-    return SDL_APP_FAILURE;
-  } else {
-    Mix_QuerySpec(&spec.freq, &spec.format, &spec.channels);
-    SDL_Log("Opened audio at %d Hz %d bit%s %s audio buffer\n", spec.freq,
-            (spec.format&0xFF),
-            (SDL_AUDIO_ISFLOAT(spec.format) ? " (float)" : ""),
-            (spec.channels > 2) ? "surround" : (spec.channels > 1) ? "stereo" : "mono");
-  }
-
-  TRY {
-    load_frame_from_image("../assets/ball.png", &ball);
-    load_frame_from_image("../assets/paddle-green.png", &paddle1);
-    load_frame_from_image("../assets/paddle-red.png", &paddle2);
-    load_frame_from_image("../assets/table.jpg", &table);
-  } CATCH(EXC_NULLPOINTER) {
-    SDL_Log("Attempting to load asset: %s", EXCLIB_EXCEPTION->description);
-    return SDL_APP_FAILURE;
-  } ETRY;
-
-  /*
-  TRY {
-    //load_start_bgm("../assets/nutcracker.mid");
-    load_start_bgm("../assets/memories.mp3");
-  } CATCH(EXC_NULLPOINTER) {
-  } CATCH_GROUP(EXC_SDL_INIT) {
-  } CATCH_GROUP(EXC_SDL_MUSICMIXER) {
-    SDL_Log("Attempting to load and play background music: %s (%s)", EXCLIB_EXCEPTION->description, SDL_GetError());
-    return SDL_APP_FAILURE;
-  } ETRY;
-  */
-
-  return SDL_APP_CONTINUE;
-}
-
-SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
-{
-  if (event->type == SDL_EVENT_QUIT) {
-    return SDL_APP_SUCCESS;  /* end the program, reporting success to the OS. */
-  } else if (event->type == SDL_EVENT_JOYSTICK_BUTTON_UP) {
-    GAME_handle_joystick_button_up(appstate, event);
-  } else if (event->type == SDL_EVENT_JOYSTICK_ADDED) {
-    GAME_handle_joystick_added(appstate, event);
-  } else if (event->type == SDL_EVENT_JOYSTICK_REMOVED) {
-    GAME_handle_joystick_removed(appstate, event);
-  }
-  return SDL_APP_CONTINUE;  /* carry on with the program! */
-}
-
-SDL_AppResult SDL_AppIterate(void *appstate)
-{
-  SDL_FRect dest;
-  b2Vec2 position;
-  
-  GAME_draw_background(640, 480);
-
-  b2World_Step(physicsWorldId, physicsTimeStep, physicsSubStepCount);
-
-  dest.x = 0;
-  dest.y = 0;
-  dest.w = table.w;
-  dest.h = table.h;
-  SDL_RenderTexture(renderer, table.texture, NULL, &dest);
-  
-  dest.x = 16;
-  dest.y = 200;
-  dest.w = paddle1.w;
-  dest.h = paddle1.h;
-  SDL_RenderTexture(renderer, paddle1.texture, NULL, &dest);
-  
-  dest.x = (640-32);
-  dest.y = 200;
-  dest.w = paddle1.w;
-  dest.h = paddle1.h;
-  SDL_RenderTexture(renderer, paddle2.texture, NULL, &dest);
-  
-  position = b2Body_GetPosition(physicsBallBodyId);
-  dest.x = (int)SCREEN_PHYSICS_SCALE(position.x);
-  dest.y = (int)SCREEN_PHYSICS_SCALE(position.y);
-  dest.w = 16;
-  dest.h = 16;
-  SDL_RenderTexture(renderer, ball.texture, NULL, &dest);
-
-  SDL_RenderPresent(renderer);
-  return SDL_APP_CONTINUE;
-}
-
-void SDL_AppQuit(void *appstate, SDL_AppResult result)
-{
-  /* SDL will clean up the window/renderer for us. */
-  SDL_DestroyTexture(ball.texture);
-  b2DestroyWorld(physicsWorldId);
-  SDL_Log("Freeing music resources");
-  if ( bgm != NULL ) {
-    Mix_FreeMusic(bgm);
-  }
-  SDL_Log("Quitting mixer");
-  Mix_Quit();
-}
-

src/sprite.c

@@ -8,101 +8,8 @@
 #include "game.h"
 #include "sprite.h"
 #include "json_helpers.h"
-
+#include "heap.h"
-SDL_PropertiesID REGISTRY_ACTOR;
+#include "registry.h"
-SDL_PropertiesID REGISTRY_SPRITE;
-SDL_PropertiesID REGISTRY_SPRITESHEET;
-SDL_PropertiesID REGISTRY_CHARACTER;
-
-actor HEAP_ACTOR[MAX_HEAP_ACTOR];
-sprite HEAP_SPRITE[MAX_HEAP_SPRITE];
-spritesheet HEAP_SPRITESHEET[MAX_HEAP_SPRITESHEET];
-character HEAP_CHARACTER[MAX_HEAP_CHARACTER];
-
-void heap_init()
-{
-    int i = 0;
-    for ( i = 0; i < MAX_HEAP_ACTOR; i++) {
-	memset(&HEAP_ACTOR[i], 0x00, sizeof(actor));
-    }
-    for ( i = 0; i < MAX_HEAP_SPRITE; i++) {
-	memset(&HEAP_SPRITE[i], 0x00, sizeof(sprite));
-    }
-    for ( i = 0; i < MAX_HEAP_SPRITESHEET; i++) {
-	memset(&HEAP_SPRITESHEET[i], 0x00, sizeof(spritesheet));
-    }
-    for ( i = 0; i < MAX_HEAP_CHARACTER; i++) {
-	memset(&HEAP_CHARACTER[i], 0x00, sizeof(character));
-    }
-}
-
-actor *heap_next_actor()
-{
-    for (int i = 0; i < MAX_HEAP_ACTOR; i++ ) {
-	if ( HEAP_ACTOR[i].refcount != 0 ) {
-	    continue;
-	}
-	return &HEAP_ACTOR[i];
-    }
-    THROW(EXC_HEAPERROR, "Unable to find unused actor on the heap");
-}
-
-sprite *heap_next_sprite()
-{
-    for (int i = 0; i < MAX_HEAP_SPRITE; i++ ) {
-	if ( HEAP_SPRITE[i].refcount != 0 ) {
-	    continue;
-	}
-	return &HEAP_SPRITE[i];
-    }
-    THROW(EXC_HEAPERROR, "Unable to find unused sprite on the heap");
-}
-
-spritesheet *heap_next_spritesheet()
-{
-    for (int i = 0; i < MAX_HEAP_SPRITESHEET; i++ ) {
-	if ( HEAP_SPRITESHEET[i].refcount != 0 ) {
-	    continue;
-	}
-	return &HEAP_SPRITESHEET[i];
-    }
-    THROW(EXC_HEAPERROR, "Unable to find unused spritesheet on the heap");
-}
-
-character *heap_next_character()
-{
-    for (int i = 0; i < MAX_HEAP_CHARACTER; i++ ) {
-	if ( HEAP_CHARACTER[i].refcount != 0 ) {
-	    continue;
-	}
-	return &HEAP_CHARACTER[i];
-    }
-    THROW(EXC_HEAPERROR, "Unable to find unused character on the heap");
-}
-
-void registry_init_actor()
-{
-    REGISTRY_ACTOR = SDL_CreateProperties();
-    THROW_ZERO(REGISTRY_ACTOR, EXC_NULLPOINTER, "Error initializing actor registry");
-}
-
-void registry_init_sprite()
-{
-    REGISTRY_SPRITE = SDL_CreateProperties();
-    THROW_ZERO(REGISTRY_SPRITE, EXC_NULLPOINTER, "Error initializing sprite registry");
-}
-
-void registry_init_spritesheet()
-{
-    REGISTRY_SPRITESHEET = SDL_CreateProperties();
-    THROW_ZERO(REGISTRY_SPRITESHEET, EXC_NULLPOINTER, "Error initializing spritesheet registry");
-}
-
-void registry_init_character()
-{
-    REGISTRY_CHARACTER = SDL_CreateProperties();
-    THROW_ZERO(REGISTRY_CHARACTER, EXC_NULLPOINTER, "Error initializing character registry");
-}
 
 void actor_initialize(actor *obj, char *name)
 {
@@ -444,48 +351,3 @@ void character_state_sprites_iterate(void *userdata, SDL_PropertiesID registry,
     }
 }
 
-void heap_release_actor(actor *ptr)
-{
-    THROW_ZERO(ptr, EXC_NULLPOINTER, "NULL character reference");
-    ptr->refcount -= 1;
-    if ( ptr->refcount == 0 ) {
-	heap_release_character(ptr->basechar);
-	SDL_ClearProperty(REGISTRY_ACTOR, (char *)&ptr->name);
-    }
-}
-
-void heap_release_character(character *basechar)
-{
-    iterator opflags;
-    THROW_ZERO(basechar, EXC_NULLPOINTER, "NULL character reference");
-    BITMASK_CLEAR(opflags.flags);
-    BITMASK_ADD(opflags.flags, ITERATOR_OP_RELEASE);
-  
-    basechar->refcount -= 1;
-    if ( basechar->refcount == 0 ) {
-	SDL_EnumerateProperties(basechar->state_sprites, &character_state_sprites_iterate, (void *)&opflags);
-	SDL_ClearProperty(REGISTRY_CHARACTER, (char *)&basechar->name);
-    }
-}
-
-void heap_release_sprite(sprite *ptr)
-{
-    THROW_ZERO(ptr, EXC_NULLPOINTER, "Received NULL sprite reference");
-    ptr->refcount -= 1;
-    if ( ptr->refcount == 0 ) {
-	heap_release_spritesheet(ptr->sheet);
-	SDL_ClearProperty(REGISTRY_SPRITE, (char *)&ptr->name);
-    }
-}
-
-void heap_release_spritesheet(spritesheet *ptr)
-{
-    THROW_ZERO(ptr, EXC_NULLPOINTER, "Received NULL spritesheet reference");
-    ptr->refcount -= 1;
-    if ( ptr->refcount == 0 ) {
-	// TODO : If we go threaded, make sure this is only happening on the main thread
-	SDL_DestroyTexture(ptr->texture);
-	SDL_ClearProperty(REGISTRY_CHARACTER, (char *)&ptr->name);
-    }
-}
-

src/sprite.h

@@ -3,6 +3,7 @@
 
 #include <box2d/box2d.h>
 #include <SDL3/SDL_properties.h>
+#include <SDL3/SDL.h>
 
 #define ACTOR_STATE_FACE_DOWN             1                    // 1
 #define ACTOR_STATE_FACE_LEFT             1 << 1               // 2
@@ -44,11 +45,6 @@
 #define SPRITE_MAX_ACTOR_NAME_LENGTH      128
 #define SPRITE_MAX_CHARACTER_NAME_LENGTH  128
 
-#define MAX_HEAP_ACTOR                    64
-#define MAX_HEAP_SPRITE                   (MAX_HEAP_ACTOR * 16)
-#define MAX_HEAP_SPRITESHEET              MAX_HEAP_SPRITE
-#define MAX_HEAP_CHARACTER                256
-
 typedef struct {
   int refcount;
   SDL_Texture *texture;
@@ -93,16 +89,6 @@ typedef struct {
   int y;
 } actor;
 
-extern SDL_PropertiesID REGISTRY_ACTOR;
-extern SDL_PropertiesID REGISTRY_SPRITE;
-extern SDL_PropertiesID REGISTRY_SPRITESHEET;
-extern SDL_PropertiesID REGISTRY_CHARACTER;
-
-extern actor HEAP_ACTOR[MAX_HEAP_ACTOR];
-extern sprite HEAP_SPRITE[MAX_HEAP_SPRITE];
-extern spritesheet HEAP_SPRITESHEET[MAX_HEAP_SPRITESHEET];
-extern character HEAP_CHARACTER[MAX_HEAP_CHARACTER];
-
 void actor_initialize(actor *obj, char *name);
 void actor_set_character(actor *obj, char *basecharname);
 void actor_render(actor *obj, SDL_Renderer *renderer);
@@ -120,20 +106,4 @@ void sprite_initialize(sprite *spr, char *name, spritesheet *sheet);
 void spritesheet_initialize(spritesheet *sheet, short sprite_w, short sprite_h, char *filename);
 void sprite_load_json(char *filename);
 
-void registry_init_actor();
-void registry_iterate_actor(void *userdata, SDL_PropertiesID registry, const char *name);
-void registry_init_sprite();
-void registry_init_spritesheet();
-void registry_init_character();
-
-void heap_init();
-actor *heap_next_actor();
-sprite *heap_next_sprite();
-spritesheet *heap_next_spritesheet();
-character *heap_next_character();
-void heap_release_actor(actor *ptr);
-void heap_release_sprite(sprite *ptr);
-void heap_release_spritesheet(spritesheet *ptr);
-void heap_release_character(character *ptr);
-
 #endif //_SPRITE_H_

src/string.c

@@ -0,0 +1,12 @@
+#include "string.h"
+#include <aklabs/exclib.h>
+
+void string_initialize(string *obj, char *init)
+{
+  THROW_ZERO(obj, EXC_NULLPOINTER, "Attempted to initialize NULL string reference");
+  if ( init != NULL ) {
+    strncpy(obj->data, init, MAX_STRING_LENGTH);
+  } else {
+    memset(&obj->data, 0x00, sizeof(MAX_STRING_LENGTH));
+  }
+}

src/string.h

@@ -0,0 +1,14 @@
+#ifndef _STRING_H_
+#define _STRING_H_
+
+#define MAX_STRING_LENGTH            256
+
+typedef struct string
+{
+  int refcount;
+  char data[MAX_STRING_LENGTH];
+} string;
+
+void string_initialize(string *obj, char *init);
+
+#endif //_STRING_H_

src/tilemap.c

@@ -2,12 +2,16 @@
 #include <SDL3_image/SDL_image.h>
 #include <SDL3_mixer/SDL_mixer.h>
 #include <aklabs/exclib.h>
+#include <string.h>
+#include <jansson.h>
+
 #include "tilemap.h"
 #include "game.h"
 #include "sprite.h"
-#include <string.h>
-#include <jansson.h>
 #include "json_helpers.h"
+#include "heap.h"
+#include "string.h"
+#include "registry.h"
 
 static json_t *get_json_tilemap_property(json_t *obj, char *key, char *type)
 {
@@ -239,6 +243,7 @@ static void tilemap_load_layers(tilemap *dest, json_t *root)
     layer = get_json_array_index_object(layers, i);
     if ( (get_json_integer_value(layer, "id") - 1) != i ) {
       // TileD's map layer IDs start at 1, not 0, and are sequential but not necessarily contiguous. We may have a gap in IDs.
+      json_decref(layer);
       continue;
     }
 
@@ -259,9 +264,9 @@ static void tilemap_load_layers(tilemap *dest, json_t *root)
 	}      
     } FINALLY {
 	json_decref(layer);
-	json_decref(layers);
     } ETRY;
   }
+  json_decref(layers);
 }
 
 void tilemap_load(char *fname, tilemap *dest)