mirror of
https://github.com/yuzu-emu/ext-boost.git
synced 2024-12-23 04:05:33 +00:00
130 lines
4.9 KiB
C++
130 lines
4.9 KiB
C++
//
|
|
// defer.hpp
|
|
// ~~~~~~~~~
|
|
//
|
|
// Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
|
|
//
|
|
// 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)
|
|
//
|
|
|
|
#ifndef BOOST_ASIO_DEFER_HPP
|
|
#define BOOST_ASIO_DEFER_HPP
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
# pragma once
|
|
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
|
|
#include <boost/asio/detail/config.hpp>
|
|
#include <boost/asio/async_result.hpp>
|
|
#include <boost/asio/detail/type_traits.hpp>
|
|
#include <boost/asio/execution_context.hpp>
|
|
#include <boost/asio/is_executor.hpp>
|
|
|
|
#include <boost/asio/detail/push_options.hpp>
|
|
|
|
namespace boost {
|
|
namespace asio {
|
|
|
|
/// Submits a completion token or function object for execution.
|
|
/**
|
|
* This function submits an object for execution using the object's associated
|
|
* executor. The function object is queued for execution, and is never called
|
|
* from the current thread prior to returning from <tt>defer()</tt>.
|
|
*
|
|
* The use of @c defer(), rather than @ref post(), indicates the caller's
|
|
* preference that the executor defer the queueing of the function object. This
|
|
* may allow the executor to optimise queueing for cases when the function
|
|
* object represents a continuation of the current call context.
|
|
*
|
|
* This function has the following effects:
|
|
*
|
|
* @li Constructs a function object handler of type @c Handler, initialized
|
|
* with <tt>handler(forward<CompletionToken>(token))</tt>.
|
|
*
|
|
* @li Constructs an object @c result of type <tt>async_result<Handler></tt>,
|
|
* initializing the object as <tt>result(handler)</tt>.
|
|
*
|
|
* @li Obtains the handler's associated executor object @c ex by performing
|
|
* <tt>get_associated_executor(handler)</tt>.
|
|
*
|
|
* @li Obtains the handler's associated allocator object @c alloc by performing
|
|
* <tt>get_associated_allocator(handler)</tt>.
|
|
*
|
|
* @li Performs <tt>ex.defer(std::move(handler), alloc)</tt>.
|
|
*
|
|
* @li Returns <tt>result.get()</tt>.
|
|
*/
|
|
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
|
|
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) defer(
|
|
BOOST_ASIO_MOVE_ARG(CompletionToken) token);
|
|
|
|
/// Submits a completion token or function object for execution.
|
|
/**
|
|
* This function submits an object for execution using the specified executor.
|
|
* The function object is queued for execution, and is never called from the
|
|
* current thread prior to returning from <tt>defer()</tt>.
|
|
*
|
|
* The use of @c defer(), rather than @ref post(), indicates the caller's
|
|
* preference that the executor defer the queueing of the function object. This
|
|
* may allow the executor to optimise queueing for cases when the function
|
|
* object represents a continuation of the current call context.
|
|
*
|
|
* This function has the following effects:
|
|
*
|
|
* @li Constructs a function object handler of type @c Handler, initialized
|
|
* with <tt>handler(forward<CompletionToken>(token))</tt>.
|
|
*
|
|
* @li Constructs an object @c result of type <tt>async_result<Handler></tt>,
|
|
* initializing the object as <tt>result(handler)</tt>.
|
|
*
|
|
* @li Obtains the handler's associated executor object @c ex1 by performing
|
|
* <tt>get_associated_executor(handler)</tt>.
|
|
*
|
|
* @li Creates a work object @c w by performing <tt>make_work(ex1)</tt>.
|
|
*
|
|
* @li Obtains the handler's associated allocator object @c alloc by performing
|
|
* <tt>get_associated_allocator(handler)</tt>.
|
|
*
|
|
* @li Constructs a function object @c f with a function call operator that
|
|
* performs <tt>ex1.dispatch(std::move(handler), alloc)</tt> followed by
|
|
* <tt>w.reset()</tt>.
|
|
*
|
|
* @li Performs <tt>Executor(ex).defer(std::move(f), alloc)</tt>.
|
|
*
|
|
* @li Returns <tt>result.get()</tt>.
|
|
*/
|
|
template <typename Executor,
|
|
BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken
|
|
BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(Executor)>
|
|
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) defer(
|
|
const Executor& ex,
|
|
BOOST_ASIO_MOVE_ARG(CompletionToken) token
|
|
BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(Executor),
|
|
typename enable_if<is_executor<Executor>::value>::type* = 0);
|
|
|
|
/// Submits a completion token or function object for execution.
|
|
/**
|
|
* @returns <tt>defer(ctx.get_executor(), forward<CompletionToken>(token))</tt>.
|
|
*/
|
|
template <typename ExecutionContext,
|
|
BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken
|
|
BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(
|
|
typename ExecutionContext::executor_type)>
|
|
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) defer(
|
|
ExecutionContext& ctx,
|
|
BOOST_ASIO_MOVE_ARG(CompletionToken) token
|
|
BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(
|
|
typename ExecutionContext::executor_type),
|
|
typename enable_if<is_convertible<
|
|
ExecutionContext&, execution_context&>::value>::type* = 0);
|
|
|
|
} // namespace asio
|
|
} // namespace boost
|
|
|
|
#include <boost/asio/detail/pop_options.hpp>
|
|
|
|
#include <boost/asio/impl/defer.hpp>
|
|
|
|
#endif // BOOST_ASIO_DEFER_HPP
|