Expose asset timestamp probe boundary

src/platform_api/asset_file_load_policy.cpp

@@ -5,6 +5,19 @@
 
 namespace pp::platform {
 
+AssetFileTimestampProbe probe_asset_file_timestamp(std::string_view absolute_path)
+{
+    struct stat file_info {};
+    const std::string path(absolute_path);
+    if (stat(path.c_str(), &file_info) != 0)
+        return {};
+
+    return {
+        true,
+        static_cast<std::int64_t>(file_info.st_mtime),
+    };
+}
+
 AssetFileLoadDecision plan_asset_file_load_with_probe(
     PlatformFamily family,
     bool already_loaded,
@@ -43,25 +56,11 @@ AssetFileLoadDecision plan_asset_file_load_for_platform(
             {});
     }
 
-    struct stat file_info {};
-    const std::string path(absolute_path);
-    if (stat(path.c_str(), &file_info) != 0)
-    {
-        return plan_asset_file_load_with_probe(
-            family,
-            already_loaded,
-            previous_last_write_time,
-            {});
-    }
-
     return plan_asset_file_load_with_probe(
         family,
         already_loaded,
         previous_last_write_time,
-        {
-            true,
-            static_cast<std::int64_t>(file_info.st_mtime),
-        });
+        probe_asset_file_timestamp(absolute_path));
 }
 
 AssetFileLoadDecision plan_asset_file_load(

src/platform_api/asset_file_load_policy.h

@@ -18,6 +18,9 @@ struct AssetFileTimestampProbe {
     std::int64_t last_write_time = 0;
 };
 
+[[nodiscard]] AssetFileTimestampProbe probe_asset_file_timestamp(
+    std::string_view absolute_path);
+
 [[nodiscard]] AssetFileLoadDecision plan_asset_file_load_with_probe(
     PlatformFamily family,
     bool already_loaded,