// SafeHandle.hpp

#if !defined(SAFE_HANDLE_HPP)
#define SAFE_HANDLE_HPP


#include <cassert>


namespace CipresJNI {


// SafeHandle
class SafeHandle {
public:
	explicit SafeHandle(HANDLE value = NULL) throw() : m_handle(value) { }
	SafeHandle(SafeHandle &value) throw() : m_handle(value.m_handle)
	{
		// maintain exclusive ownership
		value.m_handle = NULL;
	}
	~SafeHandle() throw()
	{
		if(m_handle != NULL)
			::CloseHandle(m_handle);
	}

	// Get
	HANDLE Get() const throw()
	{
		return m_handle;
	}

	// Reset
	void Reset(HANDLE value) throw()
	{
		if(m_handle != NULL)
			::CloseHandle(m_handle);

		m_handle = value;
	}

	// operator &
	HANDLE *operator &() throw()
	{
		if(m_handle != NULL) {
			::CloseHandle(m_handle);

			m_handle = NULL;
		}

		return &m_handle;
	}

	// operator ==
	bool operator ==(int null_value) const throw()
	{
		assert(null_value == NULL);

		return m_handle == NULL;
	}

	// operator !=
	bool operator !=(int null_value) const throw()
	{
		assert(null_value == NULL);

		return m_handle != NULL;
	}

	// bool conversion operator
	operator bool() const throw()
	{
		return m_handle != NULL;
	}

	// operator !
	bool operator !() const throw()
	{
		return m_handle == NULL;
	}

private:
	HANDLE m_handle;
};


} // namespace CipresJNI


#endif // SAFE_HANDLE_HPP