00001 /* 00002 * qchannel.h 00003 * 00004 * Class for implementing a serial queue channel in memory. 00005 * 00006 * Portable Windows Library 00007 * 00008 * Copyright (c) 2001 Equivalence Pty. Ltd. 00009 * 00010 * The contents of this file are subject to the Mozilla Public License 00011 * Version 1.0 (the "License"); you may not use this file except in 00012 * compliance with the License. You may obtain a copy of the License at 00013 * http://www.mozilla.org/MPL/ 00014 * 00015 * Software distributed under the License is distributed on an "AS IS" 00016 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 00017 * the License for the specific language governing rights and limitations 00018 * under the License. 00019 * 00020 * The Original Code is Portable Windows Library. 00021 * 00022 * The Initial Developer of the Original Code is Equivalence Pty. Ltd. 00023 * 00024 * Contributor(s): ______________________________________. 00025 * 00026 * $Log: qchannel.h,v $ 00027 * Revision 1.3 2004/11/11 07:34:50 csoutheren 00028 * Added #include <ptlib.h> 00029 * 00030 * Revision 1.2 2002/09/16 01:08:59 robertj 00031 * Added #define so can select if #pragma interface/implementation is used on 00032 * platform basis (eg MacOS) rather than compiler, thanks Robert Monaghan. 00033 * 00034 * Revision 1.1 2001/07/10 03:07:07 robertj 00035 * Added queue channel and delay channel classes to ptclib. 00036 * 00037 */ 00038 00039 #ifndef _QCHANNEL_H 00040 #define _QCHANNEL_H 00041 00042 00043 #ifdef P_USE_PRAGMA 00044 #pragma interface 00045 #endif 00046 00047 #include <ptlib.h> 00048 00062 class PQueueChannel : public PChannel 00063 { 00064 PCLASSINFO(PQueueChannel, PChannel); 00065 public: 00070 PQueueChannel( 00071 PINDEX queueSize = 0 00072 ); 00073 00076 ~PQueueChannel(); 00078 00079 00093 virtual BOOL Read( 00094 void * buf, 00095 PINDEX len 00096 ); 00097 00107 virtual BOOL Write( 00108 const void * buf, 00109 PINDEX len 00110 ); 00111 00115 virtual BOOL Close(); 00117 00118 00123 virtual BOOL Open( 00124 PINDEX queueSize 00125 ); 00126 00128 PINDEX GetSize() const { return queueSize; } 00129 00131 PINDEX GetLength() const { return queueLength; } 00133 00134 protected: 00135 PMutex mutex; 00136 BYTE * queueBuffer; 00137 PINDEX queueSize, queueLength, enqueuePos, dequeuePos; 00138 PSyncPoint unempty; 00139 PSyncPoint unfull; 00140 }; 00141 00142 00143 #endif // _QCHANNEL_H 00144 00145 00146 // End Of File ///////////////////////////////////////////////////////////////