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+/*
+ * Copyright (c) 2005, Eric Crahen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __GUARDEDCLASS_H__
+#define __GUARDEDCLASS_H__
+
+#include "zthread/Guard.h"
+#include "zthread/Mutex.h"
+
+namespace ZThread {
+
+ /**
+ * @class GuardedClass
+ * @author Eric Crahen <http://www.code-foo.com>
+ * @date <2003-07-20T20:17:34-0400>
+ * @version 2.3.0
+ *
+ * A simple wrapper template that uses Guard's to provide
+ * serialized access to an objects member functions.
+ */
+ template <class T, class LockType = Mutex>
+ class GuardedClass {
+
+ LockType _lock;
+ T* _ptr;
+
+ class TransferedScope {
+ public:
+
+ template <class LockType1, class LockType2>
+ static void shareScope(LockHolder<LockType1>& l1,
+ LockHolder<LockType2>& l2) {
+ l1.disable();
+ l2.getLock().acquire();
+ }
+
+ template <class LockType1>
+ static void createScope(LockHolder<LockType1>& l) {
+ // Don't acquire the lock when scope the Guard is created
+ }
+
+ template <class LockType1>
+ static void destroyScope(LockHolder<LockType1>& l) {
+ l.getLock().release();
+ }
+
+ };
+
+ class Proxy : Guard<LockType, TransferedScope> {
+
+ T* _object;
+
+ public:
+
+ Proxy(LockType& lock, T* object) :
+ Guard<LockType, TransferedScope>(lock), _object(object) { }
+
+ T* operator->() {
+ return _object;
+ }
+
+ };
+
+ GuardedClass();
+ GuardedClass& operator=(const GuardedClass&);
+
+ public:
+
+ GuardedClass(T* ptr) : _ptr(ptr) {}
+ ~GuardedClass() {
+ if(_ptr)
+ delete _ptr;
+ }
+
+ Proxy operator->() {
+ Proxy p(_lock, _ptr);
+ return p;
+ }
+
+ };
+
+} // namespace ZThread
+
+#endif // __ZTGUARDEDCLASS_H__