1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/genericopenlibs/cstdlib/INC/PIPEDESC.H	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,118 @@
     1.4 +// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// Support for pipes between processes
    1.18 +// CPipeDesc is in the parent process, CPipeChildDesc is in the child
    1.19 +// 
    1.20 +//
    1.21 +
    1.22 +#include "FDESC.H"
    1.23 +#include <sys/ioctl.h>
    1.24 +
    1.25 +NONSHARABLE_CLASS(CPipeDesc) : public CFileDescBase
    1.26 +/**
    1.27 +@internalComponent
    1.28 +*/
    1.29 +	{
    1.30 +public:
    1.31 +	CPipeDesc(TInt anIndex);
    1.32 +
    1.33 +	void SetClientSide(CPipeDesc*& aClientPointer);
    1.34 +	TInt LSeek(int& offset, int whence);
    1.35 +	void Read(TDes8& aDesc, TRequestStatus& aStatus);
    1.36 +	TInt ReadCompletion(TDes8& aDesc, TInt aStatus);
    1.37 +	void ReadCancel();
    1.38 +	void Write(TDes8& aDesc, TRequestStatus& aStatus);
    1.39 +	TInt WriteCompletion(TDes8& aDesc, TInt aStatus);
    1.40 +	void WriteCancel();
    1.41 +	TInt FStat(struct stat *st);
    1.42 +	void Ioctl(int aCmd, void* aParam, TRequestStatus& aStatus);
    1.43 +	TInt IoctlCompletion(int aCmd, void* aParam, TInt aStatus);
    1.44 +	void IoctlCancel();
    1.45 +
    1.46 +	void ClientRead(const RMessage2& aMessage);
    1.47 +	void ClientWrite(const RMessage2& aMessage);
    1.48 +	void ClientIoctl(const RMessage2& aMessage);
    1.49 +	void ClientCancel(const RMessage2& aMessage);
    1.50 +	void ClientClose();
    1.51 +protected:
    1.52 +	TInt FinalClose();
    1.53 +private:
    1.54 +	void Cancel();
    1.55 +	TInt IsWriteable() { return !iIndex; }	// 0 => child STDIN
    1.56 +	TInt IsReadable() { return iIndex; }
    1.57 +	TInt SelectMask()       { return (iIndex)? E32SELECT_READ :E32SELECT_WRITE; }
    1.58 +	TInt ClientSelectMask() { return (iIndex)? E32SELECT_WRITE:E32SELECT_READ;  }
    1.59 +	TInt ClientIoctlPending() { return iClientIoctlPending; }
    1.60 +
    1.61 +	void TransferFromClient();
    1.62 +	void TransferToClient();
    1.63 +	void CompleteClientIoctl(TInt ret);
    1.64 +	void CompleteClientIoctl();
    1.65 +	void Panic(TInt aReason);
    1.66 +	void Panic(RMessage2& aMessage, TInt aReason);
    1.67 +private:
    1.68 +	TInt iIndex;	// index into per-process table of pipes, also implies direction.
    1.69 +	CPipeDesc** iClientSide;
    1.70 +	TInt iClientClosed;
    1.71 +	// Pending info for parent operation
    1.72 +	TRequestStatus* iStatus;	// null implies "no pending operation"
    1.73 +	TRequestStatus* iIoctlStatus;
    1.74 +	TPtrC8 iWriteBuf;
    1.75 +	TDes8* iReadBuf;
    1.76 +	// Pending info for child operation
    1.77 +	TInt iClientLength;		// 0 implies "no pending operation"
    1.78 +	TInt iClientOffset;
    1.79 +	RMessage2 iMessage;
    1.80 +	TInt iClientIoctlPending;
    1.81 +	RMessage2 iIoctlMessage;
    1.82 +	};
    1.83 +
    1.84 +class RPosixSession;
    1.85 +NONSHARABLE_CLASS(CPipeChildDesc) : public CFileDescBase
    1.86 +/**
    1.87 +CPipeChildDesc
    1.88 +Basically just forwards requests to the parent CPosixServer, where the related CPipeDesc
    1.89 +does the actual work.
    1.90 +@internalComponent
    1.91 +*/
    1.92 +	{
    1.93 +public:
    1.94 +	CPipeChildDesc(TInt anIndex, RPosixSession& aSession); 
    1.95 +
    1.96 +	TInt LSeek(int& offset, int whence);
    1.97 +	void Read(TDes8& aDesc, TRequestStatus& aStatus);
    1.98 +	TInt ReadCompletion(TDes8& aDesc, TInt aStatus);
    1.99 +	void ReadCancel();
   1.100 +	void Write(TDes8& aDesc, TRequestStatus& aStatus);
   1.101 +	TInt WriteCompletion(TDes8& aDesc, TInt aStatus);
   1.102 +	void WriteCancel();
   1.103 +	TInt FStat(struct stat *st);
   1.104 +	void Ioctl(int aCmd, void* aParam, TRequestStatus& aStatus);
   1.105 +	void IoctlCancel();
   1.106 +
   1.107 +	void ClientClose() { iClientClosed=1; }
   1.108 +
   1.109 +protected:
   1.110 +	TInt FinalClose();
   1.111 +private:
   1.112 +	void Cancel(TInt aType);
   1.113 +	TInt IsWriteable() { return iIndex; }	// 0 => child STDIN
   1.114 +	TInt IsReadable() { return !iIndex; }
   1.115 +	TInt SelectMask() { return (!iIndex)? E32SELECT_READ:E32SELECT_WRITE; }
   1.116 +
   1.117 +	TInt iIndex;	// index into per-process table of pipes, also implies direction.
   1.118 +	RPosixSession& iSession;
   1.119 +	TInt iClientClosed;
   1.120 +	TPtr8 iParamDes;
   1.121 +	};