VideoCommon: remove 'GetLastAssetWriteTime' and switch to a steady_clock for asset times

Source/Core/VideoCommon/Assets/CustomAsset.cpp

@@ -18,7 +18,7 @@ std::size_t CustomAsset::Load()
   {
     std::lock_guard lk(m_info_lock);
     m_bytes_loaded = load_information.m_bytes_loaded;
-    m_last_loaded_time = load_information.m_load_time;
+    m_last_loaded_time = ClockType::now();
     return m_bytes_loaded;
   }
   return 0;
@@ -36,12 +36,7 @@ std::size_t CustomAsset::Unload()
   return bytes_loaded;
 }
 
-CustomAssetLibrary::TimeType CustomAsset::GetLastWriteTime() const
-{
-  return m_owning_library->GetLastAssetWriteTime(m_asset_id);
-}
-
-const CustomAssetLibrary::TimeType& CustomAsset::GetLastLoadedTime() const
+const CustomAsset::TimeType& CustomAsset::GetLastLoadedTime() const
 {
   std::lock_guard lk(m_info_lock);
   return m_last_loaded_time;

Source/Core/VideoCommon/Assets/CustomAsset.h

@@ -17,6 +17,9 @@ namespace VideoCommon
 class CustomAsset
 {
 public:
+  using ClockType = std::chrono::steady_clock;
+  using TimeType = ClockType::time_point;
+
   CustomAsset(std::shared_ptr<CustomAssetLibrary> library,
               const CustomAssetLibrary::AssetID& asset_id, u64 session_id);
   virtual ~CustomAsset() = default;
@@ -32,13 +35,8 @@ public:
   // returns the number of bytes unloaded
   std::size_t Unload();
 
-  // Queries the last time the asset was modified or standard epoch time
-  // if the asset hasn't been modified yet
-  // Note: not thread safe, expected to be called by the loader
-  CustomAssetLibrary::TimeType GetLastWriteTime() const;
-
   // Returns the time that the data was last loaded
-  const CustomAssetLibrary::TimeType& GetLastLoadedTime() const;
+  const TimeType& GetLastLoadedTime() const;
 
   // Returns an id that uniquely identifies this asset
   const CustomAssetLibrary::AssetID& GetAssetId() const;
@@ -63,7 +61,7 @@ private:
 
   mutable std::mutex m_info_lock;
   std::size_t m_bytes_loaded = 0;
-  CustomAssetLibrary::TimeType m_last_loaded_time = {};
+  TimeType m_last_loaded_time = {};
 };
 
 // An abstract class that is expected to
@@ -115,7 +113,7 @@ template <typename AssetType>
 struct CachedAsset
 {
   std::shared_ptr<AssetType> m_asset;
-  VideoCommon::CustomAssetLibrary::TimeType m_cached_write_time;
+  CustomAsset::TimeType m_cached_write_time;
 };
 
 }  // namespace VideoCommon

Source/Core/VideoCommon/Assets/CustomAssetLibrary.h

@@ -21,15 +21,12 @@ struct TextureData;
 class CustomAssetLibrary
 {
 public:
-  using TimeType = std::chrono::system_clock::time_point;
-
   // The AssetID is a unique identifier for a particular asset
   using AssetID = std::string;
 
   struct LoadInfo
   {
     std::size_t m_bytes_loaded = 0;
-    TimeType m_load_time = {};
   };
 
   virtual ~CustomAssetLibrary() = default;
@@ -37,9 +34,6 @@ public:
   // Loads a texture, if there are no levels, bytes loaded will be empty
   virtual LoadInfo LoadTexture(const AssetID& asset_id, TextureData* data) = 0;
 
-  // Gets the last write time for a given asset id
-  virtual TimeType GetLastAssetWriteTime(const AssetID& asset_id) const = 0;
-
   // Loads a texture as a game texture, providing additional checks like confirming
   // each mip level size is correct and that the format is consistent across the data
   LoadInfo LoadGameTexture(const AssetID& asset_id, TextureData* data);

Source/Core/VideoCommon/Assets/DirectFilesystemAssetLibrary.cpp

@@ -23,20 +23,6 @@ namespace VideoCommon
 {
 namespace
 {
-std::chrono::system_clock::time_point FileTimeToSysTime(std::filesystem::file_time_type file_time)
-{
-#ifdef _WIN32
-  return std::chrono::clock_cast<std::chrono::system_clock>(file_time);
-#else
-  // Note: all compilers should switch to chrono::clock_cast
-  // once it is available for use
-  const auto system_time_now = std::chrono::system_clock::now();
-  const auto file_time_now = decltype(file_time)::clock::now();
-  return std::chrono::time_point_cast<std::chrono::system_clock::duration>(
-      file_time - file_time_now + system_time_now);
-#endif
-}
-
 std::size_t GetAssetSize(const CustomTextureData& data)
 {
   std::size_t total = 0;
@@ -50,30 +36,6 @@ std::size_t GetAssetSize(const CustomTextureData& data)
   return total;
 }
 }  // namespace
-CustomAssetLibrary::TimeType
-DirectFilesystemAssetLibrary::GetLastAssetWriteTime(const AssetID& asset_id) const
-{
-  std::lock_guard lk(m_lock);
-  if (auto iter = m_assetid_to_asset_map_path.find(asset_id);
-      iter != m_assetid_to_asset_map_path.end())
-  {
-    const auto& asset_map_path = iter->second;
-    CustomAssetLibrary::TimeType max_entry;
-    for (const auto& [key, value] : asset_map_path)
-    {
-      std::error_code ec;
-      const auto tp = std::filesystem::last_write_time(value, ec);
-      if (ec)
-        continue;
-      auto tp_sys = FileTimeToSysTime(tp);
-      if (tp_sys > max_entry)
-        max_entry = tp_sys;
-    }
-    return max_entry;
-  }
-
-  return {};
-}
 
 CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadPixelShader(const AssetID& asset_id,
                                                                            PixelShaderData* data)
@@ -158,7 +120,7 @@ CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadPixelShader(const
   if (!PixelShaderData::FromJson(asset_id, root_obj, data))
     return {};
 
-  return LoadInfo{approx_mem_size, GetLastAssetWriteTime(asset_id)};
+  return LoadInfo{approx_mem_size};
 }
 
 CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadMaterial(const AssetID& asset_id,
@@ -216,7 +178,7 @@ CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadMaterial(const As
     return {};
   }
 
-  return LoadInfo{metadata_size, GetLastAssetWriteTime(asset_id)};
+  return LoadInfo{metadata_size};
 }
 
 CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadMesh(const AssetID& asset_id,
@@ -311,7 +273,7 @@ CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadMesh(const AssetI
   if (!MeshData::FromJson(asset_id, root_obj, data))
     return {};
 
-  return LoadInfo{approx_mem_size, GetLastAssetWriteTime(asset_id)};
+  return LoadInfo{approx_mem_size};
 }
 
 CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadTexture(const AssetID& asset_id,
@@ -395,7 +357,7 @@ CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadTexture(const Ass
     if (!LoadMips(texture_path->second, &data->m_texture.m_slices[0]))
       return {};
 
-    return LoadInfo{GetAssetSize(data->m_texture) + metadata_size, GetLastAssetWriteTime(asset_id)};
+    return LoadInfo{GetAssetSize(data->m_texture) + metadata_size};
   }
   else if (ext == ".png")
   {
@@ -426,7 +388,7 @@ CustomAssetLibrary::LoadInfo DirectFilesystemAssetLibrary::LoadTexture(const Ass
     if (!LoadMips(texture_path->second, &slice))
       return {};
 
-    return LoadInfo{GetAssetSize(data->m_texture) + metadata_size, GetLastAssetWriteTime(asset_id)};
+    return LoadInfo{GetAssetSize(data->m_texture) + metadata_size};
   }
 
   ERROR_LOG_FMT(VIDEO, "Asset '{}' error - extension '{}' unknown!", asset_id, ext);

Source/Core/VideoCommon/Assets/DirectFilesystemAssetLibrary.h

@@ -25,9 +25,6 @@ public:
   LoadInfo LoadMaterial(const AssetID& asset_id, MaterialData* data) override;
   LoadInfo LoadMesh(const AssetID& asset_id, MeshData* data) override;
 
-  // Gets the latest time from amongst all the files in the asset map
-  TimeType GetLastAssetWriteTime(const AssetID& asset_id) const override;
-
   // Assigns the asset id to a map of files, how this map is read is dependent on the data
   // For instance, a raw texture would expect the map to have a single entry and load that
   // file as the asset.  But a model file data might have its data spread across multiple files