/usr/include/simgear/structure/callback.hxx is in libsimgear-dev 1:2018.1.1+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | /**************************************************************************
* callback.hxx -- Wrapper classes to treat function and method pointers
* as objects.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Id$
**************************************************************************/
#ifndef _SG_CALLBACK_HXX
#define _SG_CALLBACK_HXX
/**
* Abstract base class for all callbacks.
*/
class SGCallback
{
public:
/**
*
*/
virtual ~SGCallback() {}
/**
*
*/
virtual SGCallback* clone() const = 0;
/**
* Execute the callback function.
*/
virtual void operator()() = 0;
protected:
/**
*
*/
SGCallback() {}
private:
// Not implemented.
void operator=( const SGCallback& );
};
/**
* Callback for invoking a file scope function.
*/
template< typename Fun >
class SGFunctionCallback : public SGCallback
{
public:
/**
*
*/
SGFunctionCallback( const Fun& fun )
: SGCallback(), f_(fun) {}
SGCallback* clone() const
{
return new SGFunctionCallback( *this );
}
void operator()() { f_(); }
private:
// Not defined.
SGFunctionCallback();
private:
Fun f_;
};
/**
* Callback for invoking a member function.
*/
template< class ObjPtr, typename MemFn >
class SGMethodCallback : public SGCallback
{
public:
/**
*
*/
SGMethodCallback( const ObjPtr& pObj, MemFn pMemFn )
: SGCallback(),
pObj_(pObj),
pMemFn_(pMemFn)
{
}
/**
*
*/
SGCallback* clone() const
{
return new SGMethodCallback( *this );
}
/**
*
*/
void operator()()
{
((*pObj_).*pMemFn_)();
}
private:
// Not defined.
SGMethodCallback();
private:
ObjPtr pObj_;
MemFn pMemFn_;
};
/**
* Helper template functions.
*/
template< typename Fun >
SGCallback*
make_callback( const Fun& fun )
{
return new SGFunctionCallback<Fun>(fun);
}
template< class ObjPtr, typename MemFn >
SGCallback*
make_callback( const ObjPtr& pObj, MemFn pMemFn )
{
return new SGMethodCallback<ObjPtr,MemFn>(pObj, pMemFn );
}
#endif // _SG_CALLBACK_HXX
|