RWLockImplWin32.h

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// this is for emacs file handling -*- mode: c++; indent-tabs-mode: nil -*-

// -- BEGIN LICENSE BLOCK ----------------------------------------------
// This file is part of FZIs ic_workspace.
//
// This program is free software licensed under the LGPL
// (GNU LESSER GENERAL PUBLIC LICENSE Version 3).
// You can find a copy of this license in LICENSE folder in the top
// directory of the source code.
//
// © Copyright 2016 FZI Forschungszentrum Informatik, Karlsruhe, Germany
//
// -- END LICENSE BLOCK ------------------------------------------------

//----------------------------------------------------------------------
//----------------------------------------------------------------------
#ifndef ICL_CORE_THREAD_RWLOCK_IMPL_WIN32_H_INCLUDED
#define ICL_CORE_THREAD_RWLOCK_IMPL_WIN32_H_INCLUDED

#include <vector>
#include <Windows.h>

#include "icl_core_thread/RWLockImpl.h"
#include "icl_core_thread/Mutex.h"

namespace icl_core {
namespace thread {

class RWLockImplWin32 : public RWLockImpl, protected virtual icl_core::Noncopyable
{
public:
  RWLockImplWin32();
  virtual ~RWLockImplWin32();

  virtual bool readLock();
  virtual bool readLock(const TimeStamp& timeout);
  virtual bool readLock(const TimeSpan& timeout);
  virtual bool tryReadLock();

  virtual bool writeLock();
  virtual bool writeLock(const TimeStamp& timeout);
  virtual bool writeLock(const TimeSpan& timeout);
  virtual bool tryWriteLock();

  virtual void unlock();

private:
  bool readLock(DWORD timeout);
  bool writeLock(DWORD timeout);

  Mutex m_reader_access_lock;
  HANDLE m_reader_mutex_event;
  HANDLE m_writer_mutex;
  int m_number_of_writer;
  int m_number_of_reader;
  int m_writer_pid;
  std::vector<int> m_reader_pid;
};

}
}

#endif