SharedBuffer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "HAL/Platform.h"
#include "Trace/Config.h"
 
#if TRACE_PRIVATE_MINIMAL_ENABLED && TRACE_PRIVATE_ALLOW_IMPORTANTS
 
namespace UE {
namespace Trace {
namespace Private {
 
struct FSharedBuffer
{
    enum : uint32 { CursorShift = 10 };
    enum : uint32 { RefBit      = 1 << 0 };
    enum : uint32 { RefInit     = (1 << CursorShift) - 1 };
    enum : uint32 { MaxSize     = 1 << (32 - CursorShift - 1) };
 
    int32 volatile  Cursor; // also packs in a ref count.
    uint32          Size;
    uint32          Final;
    uint32          _Unused;
    FSharedBuffer*  Next;
};
 
struct FNextSharedBuffer
{
    FSharedBuffer*  Buffer;
    int32           RegionStart;
};
 
} // namespace Private
} // namespace Trace
} // namespace UE
 
#endif // TRACE_PRIVATE_MINIMAL_ENABLED && TRACE_PRIVATE_ALLOW_IMPORTANTS