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90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "AsyncWork.h"
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/** Stats */
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DECLARE_DWORD_ACCUMULATOR_STAT_EXTERN(TEXT("RAC Num Build"), STAT_RAC_NumBuilds, STATGROUP_RAC, );
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DECLARE_DWORD_ACCUMULATOR_STAT_EXTERN(TEXT("RAC Num Cache Hits"), STAT_RAC_NumCacheHits, STATGROUP_RAC, );
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DECLARE_DWORD_ACCUMULATOR_STAT_EXTERN(TEXT("RAC Num Retrieve fails"), STAT_RAC_NumFails, STATGROUP_RAC, );
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DECLARE_DWORD_ACCUMULATOR_STAT_EXTERN(TEXT("RAC Num Gets"), STAT_RAC_NumGets, STATGROUP_RAC, );
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DECLARE_DWORD_ACCUMULATOR_STAT_EXTERN(TEXT("RAC Num Puts"), STAT_RAC_NumPuts, STATGROUP_RAC, );
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/** Forward declarations. */
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class FRuntimeAssetCacheBuilderInterface;
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class FRuntimeAssetCacheBucket;
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/**
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* Worker to retrieve entry from cache or build it in case of cache miss.
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*/
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class FRuntimeAssetCacheAsyncWorker : public FNonAbandonableTask
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{
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public:
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/** Constructor */
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FRuntimeAssetCacheAsyncWorker(FRuntimeAssetCacheBuilderInterface* InCacheBuilder, TMap<FName, FRuntimeAssetCacheBucket*>* InBuckets);
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/** Async task interface implementation. */
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void DoWork();
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TStatId GetStatId();
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/** End of async task interface implementation. */
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/** Gets serialized cache data. */
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TArray<uint8>& GetData()
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{
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return Data;
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}
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/**
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* Checks if entry was successfully retrieved from cache.
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* @return True on success, false otherwise. Success means either cache hit or miss, as long as we got valid data.
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*/
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bool RetrievedEntry() const
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{
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return bEntryRetrieved;
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}
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private:
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/**
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* Static function to make sure a cache key contains only legal characters by using an escape.
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* @param CacheKey Cache key to sanitize
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* @return Sanitized cache key
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**/
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static FString SanitizeCacheKey(const TCHAR* CacheKey);
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/**
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* Static function to build a cache key out of the plugin name, versions and plugin specific info
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* @param PluginName Name of the runtime asset data type
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* @param VersionString Version string of the runtime asset data
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* @param PluginSpecificCacheKeySuffix Whatever is needed to uniquely identify the specific cache entry.
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* @return Assembled cache key
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**/
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static FString BuildCacheKey(const TCHAR* VersionString, const TCHAR* PluginSpecificCacheKeySuffix);
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/**
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* Static function to build a cache key out of the CacheBuilder.
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* @param CacheBuilder Builder to create key from.
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* @return Assembled cache key
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**/
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static FString BuildCacheKey(FRuntimeAssetCacheBuilderInterface* CacheBuilder);
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/**
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* Removes entries from cache until given number of bytes are freed (or more).
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* @param Bucket Bucket to clean up.
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* @param SizeOfSpaceToFreeInBytes Number of bytes to free (or more).
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*/
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void FreeCacheSpace(FName Bucket, int32 SizeOfSpaceToFreeInBytes);
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/** Cache builder to create cache entry in case of cache miss. */
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FRuntimeAssetCacheBuilderInterface* CacheBuilder;
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/** Data to return to caller. */
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TArray<uint8> Data;
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/** Reference to map of bucket names to their descriptions. */
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TMap<FName, FRuntimeAssetCacheBucket*>* Buckets;
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/**
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* True if successfully retrieved a cache entry. Can be false only when CacheBuilder
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* returns false or no CacheBuilder was provided.
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*/
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bool bEntryRetrieved;
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}; |