LoadTimeTrace.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Misc/Build.h"
#include "ProfilingDebugging/FormatArgsTrace.h"
#include "Trace/Config.h"
#include "Trace/Trace.h"
 
namespace UE { namespace Trace { class FChannel; } }
 
#if !defined(LOADTIMEPROFILERTRACE_ENABLED)
#if UE_TRACE_ENABLED && !UE_BUILD_SHIPPING
#define LOADTIMEPROFILERTRACE_ENABLED 1
#else
#define LOADTIMEPROFILERTRACE_ENABLED 0
#endif
#endif
 
#if LOADTIMEPROFILERTRACE_ENABLED
 
UE_TRACE_CHANNEL_EXTERN(LoadTimeChannel, CORE_API);
UE_TRACE_CHANNEL_EXTERN(AssetLoadTimeChannel, CORE_API);
 
struct FLoadTimeProfilerTrace
{
    struct FRequestGroupScope
    {
        template <typename... Types>
        FRequestGroupScope(const TCHAR* InFormatString, Types... FormatArgs)
        {
            FormatString = InFormatString;
            FormatArgsSize = FFormatArgsTrace::EncodeArguments(FormatArgsBuffer, FormatArgs...);
            OutputBegin();
        }
 
        CORE_API ~FRequestGroupScope();
 
    private:
        CORE_API void OutputBegin();
 
        const TCHAR* FormatString = nullptr;
        uint16 FormatArgsSize = 0;
        uint8 FormatArgsBuffer[1024];
    };
};
 
#define TRACE_LOADTIME_REQUEST_GROUP_SCOPE(Format, ...) \
    FLoadTimeProfilerTrace::FRequestGroupScope __LoadTimeTraceRequestGroupScope(Format, ##__VA_ARGS__);
 
#else
#define TRACE_LOADTIME_REQUEST_GROUP_SCOPE(...)
#endif