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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Brian Aker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/shared_ptr.hpp>
#ifndef PLUGIN_USER_LOCKS_OBSERVER_H
#define PLUGIN_USER_LOCKS_OBSERVER_H
namespace user_locks {
class Observer {
public:
typedef boost::shared_ptr<Observer> shared_ptr;
typedef std::list <shared_ptr> list;
Observer(int64_t wait_until_arg) :
woken(false),
waiting_for(wait_until_arg)
{
_mutex.lock();
}
void sleep()
{
while (not woken)
{
cond.wait(_mutex);
}
_mutex.unlock();
}
void wake()
{
{
boost::mutex::scoped_lock mutex;
woken= true;
}
cond.notify_all();
}
~Observer()
{
}
int64_t getLimit() const
{
return waiting_for;
}
private:
bool woken;
const int64_t waiting_for;
boost::mutex _mutex;
boost::condition_variable_any cond;
};
} // namespace user_locks
#endif /* PLUGIN_USER_LOCKS_OBSERVER_H */
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