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Diffstat (limited to 'src/third_party/boost-1.56.0/boost/thread/user_scheduler.hpp')
-rw-r--r-- | src/third_party/boost-1.56.0/boost/thread/user_scheduler.hpp | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/src/third_party/boost-1.56.0/boost/thread/user_scheduler.hpp b/src/third_party/boost-1.56.0/boost/thread/user_scheduler.hpp deleted file mode 100644 index 6305b9e26ce..00000000000 --- a/src/third_party/boost-1.56.0/boost/thread/user_scheduler.hpp +++ /dev/null @@ -1,202 +0,0 @@ -// Copyright (C) 2013 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) -// -// 2013/11 Vicente J. Botet Escriba -// first implementation of a simple serial scheduler. - -#ifndef BOOST_THREAD_USER_SCHEDULER_HPP -#define BOOST_THREAD_USER_SCHEDULER_HPP - -#include <boost/thread/detail/config.hpp> -#include <boost/thread/detail/delete.hpp> -#include <boost/thread/detail/move.hpp> -#include <boost/thread/sync_queue.hpp> -#include <boost/thread/detail/work.hpp> - -#include <boost/config/abi_prefix.hpp> - -namespace boost -{ - - class user_scheduler - { - /// type-erasure to store the works to do - typedef thread_detail::work work; - - /// the thread safe work queue - sync_queue<work > work_queue; - - public: - /** - * Effects: try to execute one task. - * Returns: whether a task has been executed. - * Throws: whatever the current task constructor throws or the task() throws. - */ - bool try_executing_one() - { - work task; - try - { - if (work_queue.try_pull_front(task) == queue_op_status::success) - { - task(); - return true; - } - return false; - } - catch (std::exception& ) - { - return false; - } - catch (...) - { - return false; - } - } - private: - /** - * Effects: schedule one task or yields - * Throws: whatever the current task constructor throws or the task() throws. - */ - void schedule_one_or_yield() - { - if ( ! try_executing_one()) - { - this_thread::yield(); - } - } - - - /** - * The main loop of the worker thread - */ - void worker_thread() - { - while (!closed()) - { - schedule_one_or_yield(); - } - while (try_executing_one()) - { - } - } - - public: - /// user_scheduler is not copyable. - BOOST_THREAD_NO_COPYABLE(user_scheduler) - - /** - * \b Effects: creates a thread pool that runs closures using one of its closure-executing methods. - * - * \b Throws: Whatever exception is thrown while initializing the needed resources. - */ - user_scheduler() - { - } - /** - * \b Effects: Destroys the thread pool. - * - * \b Synchronization: The completion of all the closures happen before the completion of the \c user_scheduler destructor. - */ - ~user_scheduler() - { - // signal to all the worker thread that there will be no more submissions. - close(); - } - - /** - * loop - */ - void loop() { worker_thread(); } - /** - * \b Effects: close the \c user_scheduler for submissions. - * The loop will work until there is no more closures to run. - */ - void close() - { - work_queue.close(); - } - - /** - * \b Returns: whether the pool is closed for submissions. - */ - bool closed() - { - return work_queue.closed(); - } - - /** - * \b Requires: \c Closure is a model of \c Callable(void()) and a model of \c CopyConstructible/MoveConstructible. - * - * \b Effects: The specified \c closure will be scheduled for execution at some point in the future. - * If invoked closure throws an exception the \c user_scheduler will call \c std::terminate, as is the case with threads. - * - * \b Synchronization: completion of \c closure on a particular thread happens before destruction of thread's thread local variables. - * - * \b 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)); - work_queue.push_back(boost::move(w)); - //work_queue.push(work(closure)); // todo check why this doesn't work - } -#endif - void submit(void (*closure)()) - { - work w ((closure)); - work_queue.push_back(boost::move(w)); - //work_queue.push_back(work(closure)); // todo check why this doesn't work - } - - template <typename Closure> - void submit(BOOST_THREAD_RV_REF(Closure) closure) - { - work w =boost::move(closure); - work_queue.push_back(boost::move(w)); - //work_queue.push_back(work(boost::move(closure))); // todo check why this doesn't work - } - - /** - * \b Requires: This must be called from an scheduled task. - * - * \b Effects: reschedule functions until pred() - */ - template <typename Pred> - bool reschedule_until(Pred const& pred) - { - do { - if ( ! try_executing_one()) - { - return false; - } - } while (! pred()); - return true; - } - /** - * run queued closures - */ - void run_queued_closures() - { - sync_queue<work>::underlying_queue_type q = work_queue.underlying_queue(); - while (q.empty()) - { - work task = q.front(); - q.pop_front(); - task(); - } - } - - }; - -} - -#include <boost/config/abi_suffix.hpp> - -#endif |