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// $Id: //poco/1.2/Foundation/src/LogFile_WIN32.cpp#1 $
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#include "Poco/LogFile_WIN32.h"
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#include "Poco/File.h"
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#include "Poco/Exception.h"
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LogFileImpl::LogFileImpl(const std::string& path): _path(path)
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_hFile = CreateFile(path.c_str(), GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (_hFile == INVALID_HANDLE_VALUE) throw OpenFileException(path);
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SetFilePointer(_hFile, 0, 0, FILE_END);
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// There seems to be a strange "optimization" in the Windows NTFS
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// filesystem that causes it to reuse directory entries of deleted
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// 1. create a file named "test.dat"
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// note the file's creation date
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// 2. delete the file "test.dat"
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// 3. wait a few seconds
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// 4. create a file named "test.dat"
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// the new file will have the same creation
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// date as the old one.
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// We work around this bug by taking the file's
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// modification date as a reference when the
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_creationDate = File(path).getLastModified();
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_creationDate = File(path).created();
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LogFileImpl::~LogFileImpl()
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void LogFileImpl::writeImpl(const std::string& text)
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BOOL res = WriteFile(_hFile, text.data(), (DWORD) text.size(), &bytesWritten, NULL);
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if (!res) throw WriteFileException(_path);
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res = WriteFile(_hFile, "\r\n", 2, &bytesWritten, NULL);
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if (!res) throw WriteFileException(_path);
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res = FlushFileBuffers(_hFile);
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if (!res) throw WriteFileException(_path);
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UInt64 LogFileImpl::sizeImpl() const
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li.LowPart = SetFilePointer(_hFile, 0, &li.HighPart, FILE_CURRENT);
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Timestamp LogFileImpl::creationDateImpl() const
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const std::string& LogFileImpl::pathImpl() const