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Diffstat (limited to 'CPP/7zip/Common/StreamBinder.cpp')
-rwxr-xr-x | CPP/7zip/Common/StreamBinder.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/CPP/7zip/Common/StreamBinder.cpp b/CPP/7zip/Common/StreamBinder.cpp new file mode 100755 index 00000000..2984c2d9 --- /dev/null +++ b/CPP/7zip/Common/StreamBinder.cpp @@ -0,0 +1,162 @@ +// StreamBinder.cpp + +#include "StdAfx.h" + +#include "StreamBinder.h" +#include "../../Common/Defs.h" +#include "../../Common/MyCom.h" + +using namespace NWindows; +using namespace NSynchronization; + +class CSequentialInStreamForBinder: + public ISequentialInStream, + public CMyUnknownImp +{ +public: + MY_UNKNOWN_IMP + + STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize); +private: + CStreamBinder *m_StreamBinder; +public: + ~CSequentialInStreamForBinder() { m_StreamBinder->CloseRead(); } + void SetBinder(CStreamBinder *streamBinder) { m_StreamBinder = streamBinder; } +}; + +STDMETHODIMP CSequentialInStreamForBinder::Read(void *data, UInt32 size, UInt32 *processedSize) + { return m_StreamBinder->Read(data, size, processedSize); } + +class CSequentialOutStreamForBinder: + public ISequentialOutStream, + public CMyUnknownImp +{ +public: + MY_UNKNOWN_IMP + + STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize); + +private: + CStreamBinder *m_StreamBinder; +public: + ~CSequentialOutStreamForBinder() { m_StreamBinder->CloseWrite(); } + void SetBinder(CStreamBinder *streamBinder) { m_StreamBinder = streamBinder; } +}; + +STDMETHODIMP CSequentialOutStreamForBinder::Write(const void *data, UInt32 size, UInt32 *processedSize) + { return m_StreamBinder->Write(data, size, processedSize); } + + +////////////////////////// +// CStreamBinder +// (_thereAreBytesToReadEvent && _bufferSize == 0) means that stream is finished. + +void CStreamBinder::CreateEvents() +{ + _allBytesAreWritenEvent = new CManualResetEvent(true); + _thereAreBytesToReadEvent = new CManualResetEvent(false); + _readStreamIsClosedEvent = new CManualResetEvent(false); +} + +void CStreamBinder::ReInit() +{ + _thereAreBytesToReadEvent->Reset(); + _readStreamIsClosedEvent->Reset(); + ProcessedSize = 0; +} + +CStreamBinder::~CStreamBinder() +{ + if (_allBytesAreWritenEvent != NULL) + delete _allBytesAreWritenEvent; + if (_thereAreBytesToReadEvent != NULL) + delete _thereAreBytesToReadEvent; + if (_readStreamIsClosedEvent != NULL) + delete _readStreamIsClosedEvent; +} + + + + +void CStreamBinder::CreateStreams(ISequentialInStream **inStream, + ISequentialOutStream **outStream) +{ + CSequentialInStreamForBinder *inStreamSpec = new + CSequentialInStreamForBinder; + CMyComPtr<ISequentialInStream> inStreamLoc(inStreamSpec); + inStreamSpec->SetBinder(this); + *inStream = inStreamLoc.Detach(); + + CSequentialOutStreamForBinder *outStreamSpec = new + CSequentialOutStreamForBinder; + CMyComPtr<ISequentialOutStream> outStreamLoc(outStreamSpec); + outStreamSpec->SetBinder(this); + *outStream = outStreamLoc.Detach(); + + _buffer = NULL; + _bufferSize= 0; + ProcessedSize = 0; +} + +HRESULT CStreamBinder::Read(void *data, UInt32 size, UInt32 *processedSize) +{ + UInt32 sizeToRead = size; + if (size > 0) + { + if(!_thereAreBytesToReadEvent->Lock()) + return E_FAIL; + sizeToRead = MyMin(_bufferSize, size); + if (_bufferSize > 0) + { + MoveMemory(data, _buffer, sizeToRead); + _buffer = ((const Byte *)_buffer) + sizeToRead; + _bufferSize -= sizeToRead; + if (_bufferSize == 0) + { + _thereAreBytesToReadEvent->Reset(); + _allBytesAreWritenEvent->Set(); + } + } + } + if (processedSize != NULL) + *processedSize = sizeToRead; + ProcessedSize += sizeToRead; + return S_OK; +} + +void CStreamBinder::CloseRead() +{ + _readStreamIsClosedEvent->Set(); +} + +HRESULT CStreamBinder::Write(const void *data, UInt32 size, UInt32 *processedSize) +{ + if (size > 0) + { + _buffer = data; + _bufferSize = size; + _allBytesAreWritenEvent->Reset(); + _thereAreBytesToReadEvent->Set(); + + HANDLE events[2]; + events[0] = *_allBytesAreWritenEvent; + events[1] = *_readStreamIsClosedEvent; + DWORD waitResult = ::WaitForMultipleObjects(2, events, FALSE, INFINITE); + if (waitResult != WAIT_OBJECT_0 + 0) + { + // ReadingWasClosed = true; + return E_FAIL; + } + // if(!_allBytesAreWritenEvent.Lock()) + // return E_FAIL; + } + if (processedSize != NULL) + *processedSize = size; + return S_OK; +} + +void CStreamBinder::CloseWrite() +{ + // _bufferSize must be = 0 + _thereAreBytesToReadEvent->Set(); +} |