Mercurial > projects > hoofbaby
diff deps/Platinum/Source/Core/PltRingBufferStream.h @ 0:3425707ddbf6
Initial import (hopefully this mercurial stuff works...)
author | fraserofthenight |
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date | Mon, 06 Jul 2009 08:06:28 -0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/deps/Platinum/Source/Core/PltRingBufferStream.h Mon Jul 06 08:06:28 2009 -0700 @@ -0,0 +1,113 @@ +/***************************************************************** +| +| Platinum - Ring buffer stream +| +| Copyright (c) 2004-2008, Plutinosoft, LLC. +| All rights reserved. +| http://www.plutinosoft.com +| +| This program is free software; you can redistribute it and/or +| modify it under the terms of the GNU General Public License +| as published by the Free Software Foundation; either version 2 +| of the License, or (at your option) any later version. +| +| OEMs, ISVs, VARs and other distributors that combine and +| distribute commercially licensed software with Platinum software +| and do not wish to distribute the source code for the commercially +| licensed software under version 2, or (at your option) any later +| version, of the GNU General Public License (the "GPL") must enter +| into a commercial license agreement with Plutinosoft, LLC. +| +| This program is distributed in the hope that it will be useful, +| but WITHOUT ANY WARRANTY; without even the implied warranty of +| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +| GNU General Public License for more details. +| +| You should have received a copy of the GNU General Public License +| along with this program; see the file LICENSE.txt. If not, write to +| the Free Software Foundation, Inc., +| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +| http://www.gnu.org/licenses/gpl-2.0.html +| +****************************************************************/ + +#ifndef _PLT_RING_BUFFER_STREAM_H_ +#define _PLT_RING_BUFFER_STREAM_H_ + +/*---------------------------------------------------------------------- +| includes ++---------------------------------------------------------------------*/ +#include "NptStreams.h" +#include "NptRingBuffer.h" +#include "NptThreads.h" + +/*---------------------------------------------------------------------- +| PLT_RingBufferStream class ++---------------------------------------------------------------------*/ +class PLT_RingBufferStream : public NPT_DelegatingInputStream, + public NPT_DelegatingOutputStream +{ +public: + PLT_RingBufferStream(NPT_Size buffer_size = 4096, bool blocking = true); + PLT_RingBufferStream(NPT_RingBufferReference& buffer, bool blocking = true); + virtual ~PLT_RingBufferStream(); + + void SetEos() {m_Eos = true;} + + // NPT_InputStream methods + NPT_Result Read(void* buffer, + NPT_Size bytes_to_read, + NPT_Size* bytes_read = NULL); + NPT_Result GetSize(NPT_LargeSize& size) { + NPT_AutoLock autoLock(m_Lock); + size = m_TotalBytesWritten; + return NPT_SUCCESS; + } + NPT_Result GetAvailable(NPT_LargeSize& available) { + NPT_AutoLock autoLock(m_Lock); + available = m_RingBuffer->GetAvailable(); + return NPT_SUCCESS; + } + + // NPT_OutputStream methods + NPT_Result Write(const void* buffer, + NPT_Size bytes_to_write, + NPT_Size* bytes_written = NULL); + NPT_Result Flush(); + NPT_Result Close() { m_RingBuffer->Close(); return NPT_SUCCESS; } + +protected: + // NPT_DelegatingInputStream methods + NPT_Result InputSeek(NPT_Position offset) { + NPT_COMPILER_UNUSED(offset); + return NPT_FAILURE; + } + NPT_Result InputTell(NPT_Position& offset) { + NPT_AutoLock autoLock(m_Lock); + offset = m_TotalBytesRead; + return NPT_SUCCESS; + } + + // NPT_DelegatingOutputStream methods + NPT_Result OutputSeek(NPT_Position offset) { + NPT_COMPILER_UNUSED(offset); + return NPT_FAILURE; + } + NPT_Result OutputTell(NPT_Position& offset) { + NPT_AutoLock autoLock(m_Lock); + offset = m_TotalBytesWritten; + return NPT_SUCCESS; + } + +private: + NPT_RingBufferReference m_RingBuffer; + NPT_Offset m_TotalBytesRead; + NPT_Offset m_TotalBytesWritten; + NPT_Mutex m_Lock; + bool m_Eos; + bool m_Blocking; +}; + +typedef NPT_Reference<PLT_RingBufferStream> PLT_RingBufferStreamReference; + +#endif // _PLT_RING_BUFFER_STREAM_H_