/usr/include/osgEarth/SharedSARepo is in libosgearth-dev 2.9.0+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 | /* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2016 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_SHARED_SA_REPO_H
#define OSGEARTH_SHARED_SA_REPO_H 1
#include <osgEarth/Common>
#include <osgEarth/ThreadingUtils>
#include <osg/observer_ptr>
#include <list>
namespace osgEarth
{
/**
* A thread-safe object sharing container for osg::StateAttribute instances
* (or anything else implementing the compare() method). The VirtualProgram
* uses this to share identical Program objects.
*
* Note. This object holds observers, so there is no need to deal with
* releaseGLObjects et al. since it can never be the final owner.
*/
template<typename T>
struct SharedSARepo
{
private:
typedef std::list< osg::observer_ptr<T> > SAUniqueSet;
SAUniqueSet _set;
Threading::Mutex _mx;
bool _enabled;
public:
SharedSARepo() : _enabled(true) { }
~SharedSARepo()
{
clear();
}
void setEnabled(bool value)
{
_enabled = value;
if ( !_enabled )
{
clear();
}
}
bool isEnabled() const
{
return _enabled;
}
bool share(osg::ref_ptr<T>& out)
{
if ( !_enabled )
return false;
_mx.lock();
bool found = false;
for (typename SAUniqueSet::iterator i = _set.begin(); !found && i != _set.end(); )
{
osg::ref_ptr<T> temp;
if ( i->lock(temp) )
{
if ( temp->compare( *out.get() ) == 0 )
{
out = temp.get();
//OE_DEBUG << LC << "Shared a program; repo size = " << _set.size() << std::endl;
found = true;
}
else
{
++i;
}
}
else
{
// found an orphaned observer; prune it
typename SAUniqueSet::iterator j = i++;
_set.erase( j );
//OE_DEBUG << LC << "Pruned a program; repo size = " << _set.size() << std::endl;
}
}
if ( !found )
{
_set.push_back(out.get());
//OE_DEBUG << LC << "Added a program; repo size = " << _set.size() << std::endl;
}
_mx.unlock();
return found;
}
void clear()
{
_mx.lock();
_set.clear();
_mx.unlock();
}
};
}
#endif // OSGEARTH_SHARED_SA_REPO_H
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