Fix memory leak when iterating path

engine/breeze/util/object_pool.c

@@ -42,6 +42,16 @@ void bzObjectPoolDestroy(BzObjectPool *pool) {
     bzFree(pool);
 }
 
+size_t bzObjectPoolCalcNumFree(BzObjectPool *pool) {
+    size_t count = 0;
+    i32 idx = pool->firstFree;
+    while (idx != -1) {
+        count++;
+        i32 *object = bzObjectPoolGetObject(pool, idx);
+        idx = *object;
+    }
+    return count;
+}
 void *bzObjectPool(BzObjectPool *pool) {
     if (pool->firstFree == -1)
         return NULL;

engine/breeze/util/object_pool.h

@@ -13,6 +13,7 @@ typedef struct BzObjectPoolDesc {
 BzObjectPool *bzObjectPoolCreate(const BzObjectPoolDesc *desc);
 void bzObjectPoolDestroy(BzObjectPool *pool);
 
+size_t bzObjectPoolCalcNumFree(BzObjectPool *pool);
 void *bzObjectPool(BzObjectPool *pool);
 void *bzObjectPoolGetObject(BzObjectPool *pool, i32 idx);
 i32 bzObjectPoolGetIdx(BzObjectPool *pool, void *object);

game/main.c

@@ -191,7 +191,7 @@ void update(float dt, void *userData) {
     snprintf(titleBuf, sizeof(titleBuf), "FPS: %d | %.2f ms", GetFPS(), GetFrameTime() * 1000);
     SetWindowTitle(titleBuf);
 
-   updatePlayerInput(NULL);
+    updatePlayerInput(NULL);
 }
 
 void render(float dt, void *userData) {
@@ -224,6 +224,7 @@ void imguiRender(float dt, void *userData) {
 
     igSetNextWindowSize((ImVec2){300, 400}, ImGuiCond_FirstUseEver);
     igBegin("Debug Menu", NULL, 0);
+    igText("Num paths from pool available: %llu", bzObjectPoolCalcNumFree(game->pools.pathData));
     const char *inputState = "NONE";
     switch (input->state) {
         case INPUT_NONE:

game/pathfinding.c

@@ -84,7 +84,6 @@ static void smoothPath(BzTileMap *map, PathData *pathData, BzObjectPool *pool) {
 
         prevIdx++;
         nextIdx++;
-        bzLogInfo("%llu,%llu", prevIdx, nextIdx);
 
         if (prevIdx >= currPathLen) {
             prevPath = prevPath->next;

game/systems.h

@@ -43,6 +43,7 @@ void entityUpdateSpatialID(ecs_iter_t *it);
 void entityUpdateKinematic(ecs_iter_t *it);
 
 /*
+ * 0: Game (singleton) for object pool
  * 1: Position
  * 2: Rotation
  * 3: Velocity

game/systems_entity.c

@@ -78,6 +78,7 @@ void entityUpdateKinematic(ecs_iter_t *it) {
 }
 
 void entityFollowPath(ecs_iter_t *it) {
+    const Game *game = ecs_singleton_get(ECS, Game);
     Position *position = ecs_field(it, Position, 1);
     Rotation *rotation = ecs_field(it, Rotation, 2);
     Velocity *velocity = ecs_field(it, Velocity, 3);
@@ -95,6 +96,8 @@ void entityFollowPath(ecs_iter_t *it) {
             path[i].curWaypoint++;
             if (path[i].curWaypoint >= path[i].paths->numWaypoints) {
                 path[i].curWaypoint = 0;
+                PathData *oldPath = path[i].paths;
+                bzObjectPoolRelease(game->pools.pathData, oldPath);
                 path[i].paths = path[i].paths->next;
                 if (!path[i].paths) ecs_remove(ECS, it->entities[i], Path);
             }