WindowsPlatformNamedPipe.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "GenericPlatform/GenericPlatformNamedPipe.h"
#include "Windows/WindowsSystemIncludes.h"
 
 
#if PLATFORM_SUPPORTS_NAMED_PIPES
 
class FString;
 
 
// Windows wrapper for named pipe communications
class FWindowsPlatformNamedPipe
    : public FGenericPlatformNamedPipe
{
public:
 
    FWindowsPlatformNamedPipe();
    virtual ~FWindowsPlatformNamedPipe();
 
    FWindowsPlatformNamedPipe(const FWindowsPlatformNamedPipe&) = delete;
    FWindowsPlatformNamedPipe& operator=(const FWindowsPlatformNamedPipe&) = delete;
 
public:
 
    // FGenericPlatformNamedPipe overrides
 
    virtual bool Create(const FString& PipeName, bool bAsServer, bool bAsync) override;
    virtual bool Destroy() override;
    virtual bool OpenConnection() override;
    virtual bool BlockForAsyncIO() override;
    virtual bool IsReadyForRW() const override;
    virtual bool UpdateAsyncStatus() override;
    virtual bool WriteBytes(int32 NumBytes, const void* Data) override;
    virtual bool ReadBytes(int32 NumBytes, void* OutData) override;
    virtual bool IsCreated() const override;
    virtual bool HasFailed() const override;
 
private:
 
    void*       Pipe;
    Windows::OVERLAPPED Overlapped;
    double      LastWaitingTime;
    bool        bUseOverlapped : 1;
    bool        bIsServer : 1;
 
    enum EState
    {
        State_Uninitialized,
        State_Created,
        State_Connecting,
        State_ReadyForRW,
        State_WaitingForRW,
 
        State_ErrorPipeClosedUnexpectedly,
    };
 
    EState State;
 
    bool UpdateAsyncStatusAfterRW();
};
 
 
typedef FWindowsPlatformNamedPipe FPlatformNamedPipe;
 
#endif  // PLATFORM_SUPPORTS_NAMED_PIPES