Import of the watch repository from Pebble

src/fw/applib/app_heap_util.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "app_heap_util.h"
+#include "process_state/app_state/app_state.h"
+#include "process_state/worker_state/worker_state.h"
+#include "kernel/pebble_tasks.h"
+#include "system/passert.h"
+#include "util/heap.h"
+
+static Heap* get_task_heap(void) {
+  PebbleTask task = pebble_task_get_current();
+  Heap *heap = NULL;
+
+  if (task == PebbleTask_App) {
+    heap = app_state_get_heap();
+  } else if (task == PebbleTask_Worker) {
+    heap = worker_state_get_heap();
+  } else {
+    WTF;
+  }
+
+  return heap;
+}
+
+size_t heap_bytes_used(void) {
+  Heap *heap = get_task_heap();
+  return heap->current_size;
+}
+
+size_t heap_bytes_free(void) {
+  Heap *heap = get_task_heap();
+  return heap_size(heap) - heap->current_size;
+}