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

dep/include/zthread/ThreadLocalImpl.h

@@ -0,0 +1,108 @@
+/*
+ * 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 __ZTTHREADLOCALIMPL_H__
+#define __ZTTHREADLOCALIMPL_H__
+
+#include "zthread/CountedPtr.h"
+
+namespace ZThread {
+
+  /**
+   * @class ThreadLocalImpl
+   * @author Eric Crahen <http://www.code-foo.com>
+   * @date <2003-07-27T10:23:19-0400>
+   * @version 2.3.0
+   *
+   * @see ThreadLocal
+   */
+  class ZTHREAD_API ThreadLocalImpl : private NonCopyable {   
+  public:
+
+    class Value;
+    typedef CountedPtr<Value, size_t> ValuePtr;
+
+    //!
+    class Value {
+      Value& operator=(const Value&);
+    public:
+      virtual ~Value() {}
+      virtual bool isInheritable() const = 0;
+      virtual ValuePtr clone() const = 0;
+    };
+
+    //! Create a ThreadLocalImpl
+    ThreadLocalImpl();
+  
+    //! Destroy a ThreadLocalImpl
+    ~ThreadLocalImpl();
+  
+    /**
+     * @class InitialValueFn
+     */
+    template <typename T>
+    struct InitialValueFn {      
+      T operator()() { return T(); }
+    }; 
+
+    /**
+     * @class ChildValueFn
+     */
+    struct ChildValueFn {
+      template <typename T>
+      T operator()(const T& value) { return T(value); }
+    };
+ 
+    /**
+     * @class UniqueChildValueFn
+     */
+    struct UniqueChildValueFn : public ChildValueFn { };
+    
+    /**
+     * @class InheritableValueFn
+     */
+    struct InheritableValueFn {
+
+      template <typename T>    
+      bool operator()(const T&) { return true; }
+
+      bool operator()(const UniqueChildValueFn&) { return false; }
+
+    };
+
+  protected:
+
+    //! Get the Value for the current thread
+    ValuePtr value( ValuePtr (*pfn)() ) const;
+
+    //! Clear any value set for this thread
+    void clear() const;
+
+    //! Clear any value set with any ThreadLocal for this thread
+    static void clearAll();
+
+  };
+
+} // __ZTTHREADLOCALIMPL_H__
+
+#endif
+