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TemporaryFile.cpp

//
// TemporaryFile.cpp
//
// $Id: //poco/1.2/Foundation/src/TemporaryFile.cpp#1 $
//
// Library: Foundation
// Package: Filesystem
// Module:  TemporaryFile
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/TemporaryFile.h"
#include "Poco/Path.h"
#include "Poco/Exception.h"
#include "Poco/Process.h"
#include "Poco/Mutex.h"
#include <set>
#include <sstream>


namespace Poco {


class TempFileCollector
{
public:
      TempFileCollector()
      {
      }
      
      ~TempFileCollector()
      {
            for (std::set<std::string>::iterator it = _files.begin(); it != _files.end(); ++it)
            {
                  try
                  {
                        File f(*it);
                        f.remove(true);
                  }
                  catch (Exception&)
                  {
                  }
            }
      }
      
      void registerFile(const std::string& path)
      {
            FastMutex::ScopedLock lock(_mutex);

            Path p(path);
            _files.insert(p.absolute().toString());
      }
      
private:
      std::set<std::string> _files;
      FastMutex             _mutex;
};


TemporaryFile::TemporaryFile(): File(tempName()), _keep(false)
{
}


00090 TemporaryFile::~TemporaryFile()
{
      if (!_keep)
      {
            try
            {
                  remove(true);
            }
            catch (Exception&)
            {
            }
      }
}


00105 void TemporaryFile::keep()
{
      _keep = true;
}

      
00111 void TemporaryFile::keepUntilExit()
{
      _keep = true;
      registerForDeletion(path());
}


00118 void TemporaryFile::registerForDeletion(const std::string& path)
{
      static TempFileCollector fc;
      fc.registerFile(path);
}


00125 std::string TemporaryFile::tempName()
{
      std::ostringstream name;
      static FastMutex mutex;
      static unsigned long count = 0;
      mutex.lock();
      unsigned long n = count++;
      mutex.unlock();
      name << Path::temp();
      name << "tmp" << Process::id();
      for (int i = 0; i < 6; ++i)
      {
            name << char('a' + (n % 26));
            n /= 26;
      }
      return name.str();
}


} // namespace Poco

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