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/*
Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "suspender.h"
#include <boost/foreach.hpp>
Suspender::Suspender(boost::function<void (int)> handler)
: _handler (handler)
, _count (0)
{
}
Suspender::Block::Block (Suspender* s)
: _suspender (s)
{
_suspender->increment ();
}
Suspender::Block::~Block ()
{
_suspender->decrement ();
}
Suspender::Block
Suspender::block ()
{
return Block (this);
}
void
Suspender::increment ()
{
++_count;
}
void
Suspender::decrement ()
{
--_count;
if (_count == 0) {
BOOST_FOREACH (int i, _pending) {
_handler (i);
}
_pending.clear ();
}
}
bool
Suspender::check (int property)
{
if (_count == 0) {
return false;
}
_pending.insert (property);
return true;
}
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