// Copyright (c) 2011, NetEase Inc. All rights reserved.
//
// Author: rl
// Date: 2011/6/9
//
// Lock implemetation on windows

#include "lock.h"

#if defined(OS_WIN)

namespace nbase
{

NLock::NLock()
{
	// The second parameter is the spin count, for short-held locks it avoid the
	// contending thread from going to sleep which helps performance greatly.
	::InitializeCriticalSectionAndSpinCount(&os_lock_, 2000);
}

NLock::~NLock()
{
	::DeleteCriticalSection(&os_lock_);
}

bool NLock::Try()
{
	if (::TryEnterCriticalSection(&os_lock_))
	{
		return true;
	}
	return false;
}

void NLock::Lock()
{
	::EnterCriticalSection(&os_lock_);
}

void NLock::Unlock()
{
	::LeaveCriticalSection(&os_lock_);
}

}  // namespace

#endif  // OS_WIN