/*
- * Copyright 2001-2007 Internet2
+ * Copyright 2001-2009 Internet2
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
/**
* @file xmltooling/Lockable.h
*
- * Locking abstraction
+ * Locking abstraction.
*/
#ifndef __xmltooling_lockable_h__
/**
* Abstract mixin interface for interfaces that support locking
*/
- struct XMLTOOL_API Lockable
+ class XMLTOOL_API Lockable
{
- virtual ~Lockable() {}
+ protected:
+ Lockable();
+ public:
+ virtual ~Lockable();
/**
* Lock the associated object for exclusive access.
* @param lockee pointer to an object to hold, and optionally lock
* @param lock true iff object is not yet locked
*/
- Locker(Lockable* lockee=NULL, bool lock=true) {
- if (lockee && lock)
- m_lockee=lockee->lock();
- else
- m_lockee=lockee;
- }
+ Locker(Lockable* lockee=NULL, bool lock=true);
/**
* Optionally locks an object and stores it for later release.
* @param lockee pointer to an object to hold, and optionally lock
* @param lock true iff object is not yet locked
*/
- void assign(Lockable* lockee=NULL, bool lock=true) {
- if (m_lockee)
- m_lockee->unlock();
- m_lockee=NULL;
- if (lockee && lock)
- m_lockee=lockee->lock();
- else
- m_lockee=lockee;
- }
+ void assign(Lockable* lockee=NULL, bool lock=true);
/**
* Destructor releases lock on held pointer, if any.
*/
- ~Locker() {
- if (m_lockee)
- m_lockee->unlock();
- }
+ ~Locker();
private:
Lockable* m_lockee;