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// OutMemStream.cpp
#include "StdAfx.h"
// #include <stdio.h>
#include "OutMemStream.h"
void COutMemStream::Free()
{
Blocks.Free(_memManager);
Blocks.LockMode = true;
}
void COutMemStream::Init()
{
WriteToRealStreamEvent.Reset();
_unlockEventWasSent = false;
_realStreamMode = false;
Free();
_curBlockPos = 0;
_curBlockIndex = 0;
}
void COutMemStream::DetachData(CMemLockBlocks &blocks)
{
Blocks.Detach(blocks, _memManager);
Free();
}
HRESULT COutMemStream::WriteToRealStream()
{
RINOK(Blocks.WriteToStream(_memManager->GetBlockSize(), OutSeqStream))
Blocks.Free(_memManager);
return S_OK;
}
Z7_COM7F_IMF(COutMemStream::Write(const void *data, UInt32 size, UInt32 *processedSize))
{
if (_realStreamMode)
return OutSeqStream->Write(data, size, processedSize);
if (processedSize)
*processedSize = 0;
while (size != 0)
{
if (_curBlockIndex < Blocks.Blocks.Size())
{
Byte *p = (Byte *)Blocks.Blocks[_curBlockIndex] + _curBlockPos;
size_t curSize = _memManager->GetBlockSize() - _curBlockPos;
if (size < curSize)
curSize = size;
memcpy(p, data, curSize);
if (processedSize)
*processedSize += (UInt32)curSize;
data = (const void *)((const Byte *)data + curSize);
size -= (UInt32)curSize;
_curBlockPos += curSize;
const UInt64 pos64 = GetPos();
if (pos64 > Blocks.TotalSize)
Blocks.TotalSize = pos64;
if (_curBlockPos == _memManager->GetBlockSize())
{
_curBlockIndex++;
_curBlockPos = 0;
}
continue;
}
const NWindows::NSynchronization::CHandle_WFMO events[3] =
{ StopWritingEvent, WriteToRealStreamEvent, /* NoLockEvent, */ _memManager->Semaphore };
const DWORD waitResult = NWindows::NSynchronization::WaitForMultiObj_Any_Infinite(
((Blocks.LockMode /* && _memManager->Semaphore.IsCreated() */) ? 3 : 2), events);
// printf("\n 1- outMemStream %d\n", waitResult - WAIT_OBJECT_0);
switch (waitResult)
{
case (WAIT_OBJECT_0 + 0):
return StopWriteResult;
case (WAIT_OBJECT_0 + 1):
{
_realStreamMode = true;
RINOK(WriteToRealStream())
UInt32 processedSize2;
const HRESULT res = OutSeqStream->Write(data, size, &processedSize2);
if (processedSize)
*processedSize += processedSize2;
return res;
}
case (WAIT_OBJECT_0 + 2):
{
// it has bug: no write.
/*
if (!Blocks.SwitchToNoLockMode(_memManager))
return E_FAIL;
*/
break;
}
default:
{
if (waitResult == WAIT_FAILED)
{
const DWORD res = ::GetLastError();
if (res != 0)
return HRESULT_FROM_WIN32(res);
}
return E_FAIL;
}
}
void *p = _memManager->AllocateBlock();
if (!p)
return E_FAIL;
Blocks.Blocks.Add(p);
}
return S_OK;
}
Z7_COM7F_IMF(COutMemStream::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition))
{
if (_realStreamMode)
{
if (!OutStream)
return E_FAIL;
return OutStream->Seek(offset, seekOrigin, newPosition);
}
if (seekOrigin == STREAM_SEEK_CUR)
{
if (offset != 0)
return E_NOTIMPL;
}
else if (seekOrigin == STREAM_SEEK_SET)
{
if (offset != 0)
return E_NOTIMPL;
_curBlockIndex = 0;
_curBlockPos = 0;
}
else
return E_NOTIMPL;
if (newPosition)
*newPosition = GetPos();
return S_OK;
}
Z7_COM7F_IMF(COutMemStream::SetSize(UInt64 newSize))
{
if (_realStreamMode)
{
if (!OutStream)
return E_FAIL;
return OutStream->SetSize(newSize);
}
Blocks.TotalSize = newSize;
return S_OK;
}
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