// SoftEther VPN Source Code
// Mayaqua Kernel
// 
// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
// 
// Copyright (c) 2012-2014 Daiyuu Nobori.
// Copyright (c) 2012-2014 SoftEther VPN Project, University of Tsukuba, Japan.
// Copyright (c) 2012-2014 SoftEther Corporation.
// 
// All Rights Reserved.
// 
// http://www.softether.org/
// 
// Author: Daiyuu Nobori
// Comments: Tetsuo Sugiyama, Ph.D.
// 
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// version 2 as published by the Free Software Foundation.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License version 2
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// 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 AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// 
// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
// 
// 
// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
// 
// USE ONLY IN JAPAN. DO NOT USE IT IN OTHER COUNTRIES. IMPORTING THIS
// SOFTWARE INTO OTHER COUNTRIES IS AT YOUR OWN RISK. SOME COUNTRIES
// PROHIBIT ENCRYPTED COMMUNICATIONS. USING THIS SOFTWARE IN OTHER
// COUNTRIES MIGHT BE RESTRICTED.
// 
// 
// DEAR SECURITY EXPERTS
// ---------------------
// 
// If you find a bug or a security vulnerability please kindly inform us
// about the problem immediately so that we can fix the security problem
// to protect a lot of users around the world as soon as possible.
// 
// Our e-mail address for security reports is:
// softether-vpn-security [at] softether.org
// 
// Please note that the above e-mail address is not a technical support
// inquiry address. If you need technical assistance, please visit
// http://www.softether.org/ and ask your question on the users forum.
// 
// Thank you for your cooperation.


// Object.h
// Header of Object.c

#ifndef	OBJECT_H
#define	OBJECT_H


// Constants
#define	OBJECT_ALLOC_FAIL_SLEEP_TIME		150
#define	OBJECT_ALLOC__MAX_RETRY				30

// Lock object
struct LOCK
{
	void *pData;
	BOOL Ready;
#ifdef	OS_UNIX
	UINT thread_id;
	UINT locked_count;
#endif	// OS_UNIX
#ifdef	_DEBUG
	char *FileName;
	UINT Line;
	UINT ThreadId;
#endif	// _DEBUG
};

// Counter object
struct COUNTER
{
	LOCK *lock;
	UINT c;
	bool Ready;
};

// Reference counter
struct REF
{
	COUNTER *c;
};

// Event object
struct EVENT
{
	REF *ref;
	void *pData;
};

// Deadlock detection
struct DEADCHECK
{
	LOCK *Lock;
	UINT Timeout;
	bool Unlocked;
};


// Lock function
#ifndef	_DEBUG

#define	Lock(lock)		LockInner((lock))
#define	Unlock(lock)	UnlockInner((lock))

#else	// _DEBUG

#define	Lock(lock)			\
	{						\
		LockInner(lock);	\
		if (lock != NULL) { lock->FileName = __FILE__; lock->Line = __LINE__; lock->ThreadId = ThreadId();}	\
	}

#define	Unlock(lock)		\
	{						\
		if (lock != NULL) { lock->FileName = NULL; lock->Line = 0; lock->ThreadId = 0;}	\
		UnlockInner(lock);	\
	}

#endif	// _DEBUG


// Function prototype
LOCK *NewLock();
LOCK *NewLockMain();
void DeleteLock(LOCK *lock);
COUNTER *NewCounter();
void UnlockInner(LOCK *lock);
bool LockInner(LOCK *lock);
void DeleteCounter(COUNTER *c);
UINT Count(COUNTER *c);
UINT Inc(COUNTER *c);
UINT Dec(COUNTER *c);
UINT Release(REF *ref);
UINT AddRef(REF *ref);
REF *NewRef();
EVENT *NewEvent();
void ReleaseEvent(EVENT *e);
void CleanupEvent(EVENT *e);
void Set(EVENT *e);
bool Wait(EVENT *e, UINT timeout);
bool WaitEx(EVENT *e, UINT timeout, volatile bool *cancel);
void CheckDeadLock(LOCK *lock, UINT timeout, char *name);
void CheckDeadLockThread(THREAD *t, void *param);

#endif	// OBJECT_H


// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
// Department of Computer Science has dozens of overly-enthusiastic geeks.
// Join us: http://www.tsukuba.ac.jp/english/admission/