serchan.h
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- /*
- * serchan.h
- *
- * Asynchronous serial I/O channel class.
- *
- * Portable Windows Library
- *
- * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
- *
- * The contents of this file are subject to the Mozilla Public License
- * Version 1.0 (the "License"); you may not use this file except in
- * compliance with the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS"
- * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
- * the License for the specific language governing rights and limitations
- * under the License.
- *
- * The Original Code is Portable Windows Library.
- *
- * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
- *
- * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
- * All Rights Reserved.
- *
- * Contributor(s): ______________________________________.
- *
- * $Log: serchan.h,v $
- * Revision 1.8 1998/11/30 02:55:29 robertj
- * New directory structure
- *
- * Revision 1.7 1998/09/24 03:30:22 robertj
- * Added open software license.
- *
- * Revision 1.6 1996/08/08 10:09:12 robertj
- * Directory structure changes for common files.
- *
- * Revision 1.5 1995/03/12 04:59:59 robertj
- * Re-organisation of DOS/WIN16 and WIN32 platforms to maximise common code.
- * Used built-in equate for WIN32 API (_WIN32).
- *
- * Revision 1.4 1994/08/04 13:08:43 robertj
- * Added DCB so can set parameters on closed channel.
- *
- * Revision 1.3 1994/07/17 11:01:04 robertj
- * Ehancements, implementation, bug fixes etc.
- *
- * Revision 1.2 1994/07/02 03:18:09 robertj
- * Using system timers for serial channel timeouts.
- *
- * Revision 1.1 1994/06/25 12:13:01 robertj
- * Initial revision
- *
- */
- #ifndef _PSERIALCHANNEL
- #include "....serchan.h"
- public:
- // Overrides from class PChannel
- virtual PString GetName() const;
- // Return the name of the channel.
-
- virtual BOOL Read(void * buf, PINDEX len);
- // Low level read from the channel. This function will block until the
- // requested number of characters were read.
- virtual BOOL Write(const void * buf, PINDEX len);
- // Low level write to the channel. This function will block until the
- // requested number of characters were written.
- virtual BOOL Close();
- // Close the channel.
- private:
- BOOL SetCommsParam(DWORD speed, BYTE data, Parity parity,
- BYTE stop, FlowControl inputFlow, FlowControl outputFlow);
- // Member variables
- #if defined(_WIN32)
- HANDLE commsResource;
- PString portName;
- #else
- static BOOL IsReadBlocked(PObject * obj);
- static BOOL IsWriteBlocked(PObject * obj);
- PTimer readTimer;
- PTimer writeTimer;
- #endif
- #if defined(_WINDOWS) || defined(_WIN32)
- enum { InputQueueSize = 2048, OutputQueueSize = 1024 };
- DCB deviceControlBlock;
- #else
- BYTE biosParm;
- #endif
- };
- #endif