FunctionPointer.h

00001 /**
00002  * ACKme WiConnect Host Library is licensed under the BSD licence: 
00003  * 
00004  * Copyright (c)2014 ACKme Networks.
00005  * All rights reserved. 
00006  * 
00007  * Redistribution and use in source and binary forms, with or without modification, 
00008  * are permitted provided that the following conditions are met: 
00009  * 
00010  * 1. Redistributions of source code must retain the above copyright notice, 
00011  * this list of conditions and the following disclaimer. 
00012  * 2. Redistributions in binary form must reproduce the above copyright notice, 
00013  * this list of conditions and the following disclaimer in the documentation 
00014  * and/or other materials provided with the distribution. 
00015  * 3. The name of the author may not be used to endorse or promote products 
00016  * derived from this software without specific prior written permission. 
00017  * 
00018  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS AND ANY EXPRESS OR IMPLIED 
00019  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
00020  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
00021  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00022  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
00023  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
00024  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
00025  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
00026  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
00027  * OF SUCH DAMAGE.
00028  */
00029 #pragma once
00030 
00031 
00032 namespace wiconnect
00033 {
00034 
00035 
00036 /**
00037  * @brief Generic function pointer.
00038  * @note Internal use only
00039  */
00040 class FunctionPointer
00041 {
00042 public:
00043     /*************************************************************************************************/
00044     FunctionPointer& operator=( const FunctionPointer& other )
00045     {
00046         _object = other._object;
00047         _function = other._function;
00048         _membercaller = other._membercaller;
00049         memcpy(_member, other._member, sizeof(_member));
00050         return *this;
00051     }
00052 
00053     /*************************************************************************************************/
00054     bool isValid() const
00055     {
00056         return (_function != NULL) || (_object != NULL);
00057     }
00058 
00059     /*************************************************************************************************/
00060     void setInvalid()
00061     {
00062         _function = NULL;
00063         _object = NULL;
00064     }
00065 
00066 protected:
00067     void *_object;
00068     void *_function;
00069     char _member[16];
00070     void *_membercaller;
00071 };
00072 
00073 }