Mutex_WIN32.h

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//
// Mutex_WIN32.h
//
// Library: Foundation
// Package: Threading
// Module:  Mutex
//
// Definition of the MutexImpl and FastMutexImpl classes for WIN32.
//
// Copyright (c) 2004-2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
 
 
#ifndef Foundation_Mutex_WIN32_INCLUDED
#define Foundation_Mutex_WIN32_INCLUDED
 
 
#include "Poco/Foundation.h"
#include "Poco/Exception.h"
#include "Poco/UnWindows.h"
 
 
namespace Poco {
 
 
class Foundation_API MutexImpl
{
protected:
    MutexImpl();
    ~MutexImpl();
    void lockImpl();
    bool tryLockImpl();
    bool tryLockImpl(long milliseconds);
    void unlockImpl();
 
private:
    CRITICAL_SECTION _cs;
};
 
 
typedef MutexImpl FastMutexImpl;
 
 
//
// inlines
//
inline void MutexImpl::lockImpl()
{
    try
    {
        EnterCriticalSection(&_cs);
    }
    catch (...)
    {
        throw SystemException("cannot lock mutex");
    }
}
 
 
inline bool MutexImpl::tryLockImpl()
{
    try
    {
        return TryEnterCriticalSection(&_cs) != 0;
    }
    catch (...)
    {
    }
    throw SystemException("cannot lock mutex");
}
 
 
inline void MutexImpl::unlockImpl()
{
    LeaveCriticalSection(&_cs);
}
 
 
} // namespace Poco
 
 
#endif // Foundation_Mutex_WIN32_INCLUDED