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FCacheBucket is now always exposed as FAnsiStringView. #rb Zousar.Shaker #rnx #ROBOMERGE-SOURCE: CL 17084521 in //UE5/Main/... #ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v853-17066230) [CL 17084549 by devin doucette in ue5-release-engine-test branch]
125 lines
3.2 KiB
C++
125 lines
3.2 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "DerivedDataCacheKey.h"
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#include "Containers/Set.h"
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#include "Containers/StringConv.h"
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#include "DerivedDataCachePrivate.h"
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#include "Math/UnrealMathUtility.h"
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#include "Misc/ScopeRWLock.h"
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#include "Misc/StringBuilder.h"
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namespace UE::DerivedData::Private
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{
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template <typename CharType>
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static inline void AssertValidCacheBucketName(TStringView<CharType> Name)
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{
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checkf(IsValidCacheBucketName(Name),
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TEXT("A cache bucket name must be alphanumeric, non-empty, and contain fewer than 256 code units. ")
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TEXT("Name: '%s'"), *WriteToString<256>(Name));
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}
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class FCacheBucketOwner : public FCacheBucket
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{
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public:
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inline explicit FCacheBucketOwner(FAnsiStringView Bucket);
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inline FCacheBucketOwner(FCacheBucketOwner&& Bucket);
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inline ~FCacheBucketOwner();
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FCacheBucketOwner(const FCacheBucketOwner&) = delete;
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FCacheBucketOwner& operator=(const FCacheBucketOwner&) = delete;
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using FCacheBucket::operator==;
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inline bool operator==(FAnsiStringView Bucket) const { return ToString().Equals(Bucket, ESearchCase::IgnoreCase); }
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friend inline uint32 GetTypeHash(const FCacheBucketOwner& Bucket)
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{
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return ::GetTypeHash(Bucket.ToString());
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}
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};
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inline FCacheBucketOwner::FCacheBucketOwner(FAnsiStringView Bucket)
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{
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const int32 BucketLen = Bucket.Len();
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const int32 PrefixSize = FMath::DivideAndRoundUp<int32>(1, sizeof(ANSICHAR));
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ANSICHAR* Buffer = new ANSICHAR[PrefixSize + BucketLen + 1];
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Buffer += PrefixSize;
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Name = Buffer;
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reinterpret_cast<uint8*>(Buffer)[LengthOffset] = static_cast<uint8>(BucketLen);
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Bucket.CopyString(Buffer, BucketLen);
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Buffer += BucketLen;
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*Buffer = '\0';
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}
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inline FCacheBucketOwner::FCacheBucketOwner(FCacheBucketOwner&& Bucket)
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: FCacheBucket(Bucket)
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{
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Bucket.Reset();
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}
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inline FCacheBucketOwner::~FCacheBucketOwner()
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{
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if (Name)
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{
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const int32 PrefixSize = FMath::DivideAndRoundUp<int32>(1, sizeof(ANSICHAR));
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delete[] (Name - PrefixSize);
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}
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}
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class FCacheBuckets
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{
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public:
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template <typename CharType>
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inline FCacheBucket FindOrAdd(TStringView<CharType> Name);
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private:
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FRWLock Lock;
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TSet<FCacheBucketOwner> Buckets;
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};
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template <typename CharType>
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inline FCacheBucket FCacheBuckets::FindOrAdd(TStringView<CharType> Name)
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{
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const auto AnsiCast = StringCast<ANSICHAR>(Name.GetData(), Name.Len());
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const FAnsiStringView AnsiName = AnsiCast;
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const uint32 Hash = GetTypeHash(AnsiName);
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if (FReadScopeLock ReadLock(Lock); const FCacheBucketOwner* Bucket = Buckets.FindByHash(Hash, AnsiName))
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{
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return *Bucket;
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}
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// It is valid to assert after because the "bogus char" '?' is not valid in a bucket name.
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AssertValidCacheBucketName(Name);
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FCacheBucketOwner LocalBucket(AnsiName);
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FWriteScopeLock WriteLock(Lock);
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return Buckets.FindOrAddByHash(Hash, MoveTemp(LocalBucket));
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}
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static FCacheBuckets& GetCacheBuckets()
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{
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static FCacheBuckets Buckets;
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return Buckets;
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}
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} // UE::DerivedData::Private
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namespace UE::DerivedData
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{
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FCacheBucket::FCacheBucket(FUtf8StringView InName)
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: FCacheBucket(Private::GetCacheBuckets().FindOrAdd(InName))
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{
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}
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FCacheBucket::FCacheBucket(FWideStringView InName)
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: FCacheBucket(Private::GetCacheBuckets().FindOrAdd(InName))
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{
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}
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} // UE::DerivedData
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