b-identity-0505/dum/RefCountedDestroyer.hxx

#if !defined(RESIP_REFCOUNTEDDESTROYER_HXX)
#define RESIP_REFCOUNTEDDESTROYER_HXX

namespace resip
{

//designed to be used by composition, does not destroy itself.
template<class T>
class RefCountedDestroyer
{
   public:            
      class Guard
      {
         public:
            void destroy()
            {
               mRefCountedDestroyer.mDestroying = true;
            }
            
            bool destroyed()
            {
               return mRefCountedDestroyer.mDestroying;
            }

            Guard(RefCountedDestroyer& rcd)
               : mRefCountedDestroyer(rcd)
            {
               mRefCountedDestroyer.mCount++;               
            }
            
            ~Guard()
            {
               mRefCountedDestroyer.mCount--;               
               if (mRefCountedDestroyer.mDestroying && mRefCountedDestroyer.mCount == 0)
               {
                  delete mRefCountedDestroyer.mTarget;
               }
            }
         private:
            RefCountedDestroyer& mRefCountedDestroyer;            
      };      
         
      RefCountedDestroyer(T* target) :
         mTarget(target),
         mCount(0),
         mDestroying(false)
      {
      }  
   private:
      friend class Guard;            
      T* mTarget;
      int mCount;
      bool mDestroying;      
};

}

#endif

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact vocal@vovida.org.
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */
1	#if !defined(RESIP_REFCOUNTEDDESTROYER_HXX)
2	#define RESIP_REFCOUNTEDDESTROYER_HXX
3
4	namespace resip
5	{
6
7	//designed to be used by composition, does not destroy itself.
8	template<class T>
9	class RefCountedDestroyer
10	{
11	public:
12	class Guard
13	{
14	public:
15	void destroy()
16	{
17	mRefCountedDestroyer.mDestroying = true;
18	}
19
20	bool destroyed()
21	{
22	return mRefCountedDestroyer.mDestroying;
23	}
24
25	Guard(RefCountedDestroyer& rcd)
26	: mRefCountedDestroyer(rcd)
27	{
28	mRefCountedDestroyer.mCount++;
29	}
30
31	~Guard()
32	{
33	mRefCountedDestroyer.mCount--;
34	if (mRefCountedDestroyer.mDestroying && mRefCountedDestroyer.mCount == 0)
35	{
36	delete mRefCountedDestroyer.mTarget;
37	}
38	}
39	private:
40	RefCountedDestroyer& mRefCountedDestroyer;
41	};
42
43	RefCountedDestroyer(T* target) :
44	mTarget(target),
45	mCount(0),
46	mDestroying(false)
47	{
48	}
49	private:
50	friend class Guard;
51	T* mTarget;
52	int mCount;
53	bool mDestroying;
54	};
55
56	}
57
58	#endif
59
60	/* ====================================================================
61	* The Vovida Software License, Version 1.0
62	*
63	* Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
64	*
65	* Redistribution and use in source and binary forms, with or without
66	* modification, are permitted provided that the following conditions
67	* are met:
68	*
69	* 1. Redistributions of source code must retain the above copyright
70	* notice, this list of conditions and the following disclaimer.
71	*
72	* 2. Redistributions in binary form must reproduce the above copyright
73	* notice, this list of conditions and the following disclaimer in
74	* the documentation and/or other materials provided with the
75	* distribution.
76	*
77	* 3. The names "VOCAL", "Vovida Open Communication Application Library",
78	* and "Vovida Open Communication Application Library (VOCAL)" must
79	* not be used to endorse or promote products derived from this
80	* software without prior written permission. For written
81	* permission, please contact vocal@vovida.org.
82	*
83	* 4. Products derived from this software may not be called "VOCAL", nor
84	* may "VOCAL" appear in their name, without prior written
85	* permission of Vovida Networks, Inc.
86	*
87	* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
88	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
89	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
90	* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
91	* NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
92	* IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
93	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
94	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
95	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
96	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
97	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
98	* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
99	* DAMAGE.
100	*
101	* ====================================================================
102	*
103	* This software consists of voluntary contributions made by Vovida
104	* Networks, Inc. and many individuals on behalf of Vovida Networks,
105	* Inc. For more information on Vovida Networks, Inc., please see
106	* <http://www.vovida.org/>.
107	*
108	*/
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