feat: add file watcher (#765)

Author: halajohn

core/include_internal/ten_utils/lib/safe_cast.h

@@ -0,0 +1,38 @@
+//
+// Copyright © 2025 Agora
+// This file is part of TEN Framework, an open source project.
+// Licensed under the Apache License, Version 2.0, with certain conditions.
+// Refer to the "LICENSE" file in the root directory for more information.
+//
+#pragma once
+
+#include "ten_utils/ten_config.h"
+
+#include <limits.h>   // for INT_MAX, LONG_MAX
+#include <stdbool.h>  // for bool
+#include <stddef.h>   // for size_t
+#include <stdint.h>   // for INT32_MAX
+
+static inline bool safe_cast_size_t_to_int(size_t in, int *out) {
+  if (in <= (size_t)INT_MAX) {
+    *out = (int)in;
+    return true;
+  }
+  return false;
+}
+
+static inline bool safe_cast_size_t_to_long(size_t in, long *out) {
+  if (in <= (size_t)LONG_MAX) {
+    *out = (long)in;
+    return true;
+  }
+  return false;
+}
+
+static inline bool safe_cast_size_t_to_int32(size_t in, int32_t *out) {
+  if (in <= (size_t)INT32_MAX) {
+    *out = (int32_t)in;
+    return true;
+  }
+  return false;
+}

core/src/ten_manager/Cargo.lock

@@ -59,6 +59,7 @@ tokio = { version = "1", features = [
   "sync",
   "time",
   "process",
+  "macros",
 ] }
 tokio-macros = "2.5.0"
 url = { version = "2.5" }