/usr/include/simgear/structure/SGWeakPtr.hxx is in libsimgear-dev 3.0.0-1.
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 | // Copyright (C) 2004-2009 Mathias Froehlich - Mathias.Froehlich@web.de
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library 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.
//
#ifndef SGWeakPtr_HXX
#define SGWeakPtr_HXX
#include "SGWeakReferenced.hxx"
template<typename T>
class SGWeakPtr {
public:
SGWeakPtr(void)
{ }
SGWeakPtr(const SGWeakPtr& p) : mWeakData(p.mWeakData)
{ }
SGWeakPtr(T* ptr)
{ assign(ptr); }
template<typename U>
SGWeakPtr(const SGSharedPtr<U>& p)
{ SGSharedPtr<T> sharedPtr = p; assign(sharedPtr.get()); }
template<typename U>
SGWeakPtr(const SGWeakPtr<U>& p)
{ SGSharedPtr<T> sharedPtr = p.lock(); assign(sharedPtr.get()); }
~SGWeakPtr(void)
{ }
template<typename U>
SGWeakPtr& operator=(const SGSharedPtr<U>& p)
{ SGSharedPtr<T> sharedPtr = p; assign(sharedPtr.get()); return *this; }
template<typename U>
SGWeakPtr& operator=(const SGWeakPtr<U>& p)
{ SGSharedPtr<T> sharedPtr = p.lock(); assign(sharedPtr.get()); return *this; }
SGWeakPtr& operator=(const SGWeakPtr& p)
{ mWeakData = p.mWeakData; return *this; }
SGSharedPtr<T> lock(void) const
{
if (!mWeakData)
return SGSharedPtr<T>();
SGSharedPtr<T> sharedPtr;
sharedPtr.assignNonRef(mWeakData->getPointer<T>());
return sharedPtr;
}
void clear()
{ mWeakData = 0; }
void swap(SGWeakPtr& weakPtr)
{ mWeakData.swap(weakPtr.mWeakData); }
private:
void assign(T* p)
{
if (p)
mWeakData = p->mWeakData;
else
mWeakData = 0;
}
// The indirect reference itself.
SGSharedPtr<SGWeakReferenced::WeakData> mWeakData;
};
#endif
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