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// Copyright (C) 2013,2014 Vicente J. Botet Escriba
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// 2013/09 Vicente J. Botet Escriba
// Adapt to boost from CCIA C++11 implementation
#ifndef BOOST_THREAD_EXECUTORS_EXECUTOR_HPP
#define BOOST_THREAD_EXECUTORS_EXECUTOR_HPP
#include <boost/thread/detail/config.hpp>
#include <boost/thread/detail/delete.hpp>
#include <boost/thread/detail/move.hpp>
#include <boost/thread/executors/work.hpp>
#include <boost/config/abi_prefix.hpp>
namespace boost
{
namespace executors
{
class executor
{
public:
/// type-erasure to store the works to do
typedef executors::work work;
/// executor is not copyable.
BOOST_THREAD_NO_COPYABLE(executor)
executor() {}
/**
* \par Effects
* Destroys the executor.
*
* \par Synchronization
* The completion of all the closures happen before the completion of the executor destructor.
*/
virtual ~executor() {};
/**
* \par Effects
* Close the \c executor for submissions.
* The worker threads will work until there is no more closures to run.
*/
virtual void close() = 0;
/**
* \par Returns
* Whether the pool is closed for submissions.
*/
virtual bool closed() = 0;
/**
* \par Effects
* The specified closure will be scheduled for execution at some point in the future.
* If invoked closure throws an exception the executor will call std::terminate, as is the case with threads.
*
* \par Synchronization
* Ccompletion of closure on a particular thread happens before destruction of thread's thread local variables.
*
* \par Throws
* \c sync_queue_is_closed if the thread pool is closed.
* Whatever exception that can be throw while storing the closure.
*/
virtual void submit(BOOST_THREAD_RV_REF(work) closure) = 0;
// virtual void submit(work& closure) = 0;
/**
* \par Requires
* \c Closure is a model of Callable(void()) and a model of CopyConstructible/MoveConstructible.
*
* \par Effects
* The specified closure will be scheduled for execution at some point in the future.
* If invoked closure throws an exception the thread pool will call std::terminate, as is the case with threads.
*
* \par Synchronization
* Completion of closure on a particular thread happens before destruction of thread's thread local variables.
*
* \par Throws
* \c sync_queue_is_closed if the thread pool is closed.
* Whatever exception that can be throw while storing the closure.
*/
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template <typename Closure>
void submit(Closure & closure)
{
work w ((closure));
submit(boost::move(w));
}
#endif
void submit(void (*closure)())
{
work w ((closure));
submit(boost::move(w));
}
template <typename Closure>
void submit(BOOST_THREAD_RV_REF(Closure) closure)
{
work w = boost::move(closure);
submit(boost::move(w));
}
/**
* \par Effects
* Try to execute one task.
*
* \par Returns
* Whether a task has been executed.
*
* \par Throws
* Whatever the current task constructor throws or the task() throws.
*/
virtual bool try_executing_one() = 0;
/**
* \par Requires
* This must be called from an scheduled task.
*
* \par Effects
* Reschedule functions until pred()
*/
template <typename Pred>
bool reschedule_until(Pred const& pred)
{
do {
//schedule_one_or_yield();
if ( ! try_executing_one())
{
return false;
}
} while (! pred());
return true;
}
};
}
using executors::executor;
}
#include <boost/config/abi_suffix.hpp>
#endif
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