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Add caching to Config::Info

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The goal of this change is to make Config::Get(const Info<T>&)
fast so that we can use it in hot paths.
This commit is contained in:
JosJuice
2020-12-05 18:24:41 +01:00
parent 633ab2dd7c
commit d8744e6db8
4 changed files with 110 additions and 14 deletions
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21
Source/Core/Common/Config/Config.cpp
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@ -3,6 +3,7 @@
// Refer to the license.txt file included.
#include <algorithm>
#include <atomic>
#include <list>
#include <map>
#include <mutex>
@ -17,6 +18,7 @@ using Layers = std::map<LayerType, std::shared_ptr<Layer>>;
static Layers s_layers;
static std::list<ConfigChangedCallback> s_callbacks;
static u32 s_callback_guards = 0;
static std::atomic<u64> s_config_version = 0;
static std::shared_mutex s_layers_rw_lock;
@ -31,7 +33,7 @@ static void AddLayerInternal(std::shared_ptr<Layer> layer)
const Config::LayerType layer_type = layer->GetLayer();
s_layers.insert_or_assign(layer_type, std::move(layer));
}
InvokeConfigChangedCallbacks();
OnConfigChanged();
}
void AddLayer(std::unique_ptr<ConfigLayerLoader> loader)
@ -59,7 +61,7 @@ void RemoveLayer(LayerType layer)
s_layers.erase(layer);
}
InvokeConfigChangedCallbacks();
OnConfigChanged();
}
void AddConfigChangedCallback(ConfigChangedCallback func)
@ -67,15 +69,22 @@ void AddConfigChangedCallback(ConfigChangedCallback func)
s_callbacks.emplace_back(std::move(func));
}
void InvokeConfigChangedCallbacks()
void OnConfigChanged()
{
if (s_callback_guards)
return;
s_config_version.fetch_add(1, std::memory_order_relaxed);
for (const auto& callback : s_callbacks)
callback();
}
u64 GetConfigVersion()
{
return s_config_version.load(std::memory_order_relaxed);
}
// Explicit load and save of layers
void Load()
{
@ -85,7 +94,7 @@ void Load()
for (auto& layer : s_layers)
layer.second->Load();
}
InvokeConfigChangedCallbacks();
OnConfigChanged();
}
void Save()
@ -96,7 +105,7 @@ void Save()
for (auto& layer : s_layers)
layer.second->Save();
}
InvokeConfigChangedCallbacks();
OnConfigChanged();
}
void Init()
@ -207,7 +216,7 @@ ConfigChangeCallbackGuard::~ConfigChangeCallbackGuard()
if (--s_callback_guards)
return;
InvokeConfigChangedCallbacks();
OnConfigChanged();
}
} // namespace Config