Imported MaNGOS revision 6767 from http://mangos.svn.sourceforge.net/svnroot/mangos/trunk/

dep/include/zthread/GuardedClass.h

@@ -0,0 +1,103 @@
+/*
+ * 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__