blob: 6f03888dfa82eac2745b49b833d6ce9298ed4ec6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
//
// handler_invoke_hook.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2012 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_HANDLER_INVOKE_HOOK_HPP
#define BOOST_ASIO_HANDLER_INVOKE_HOOK_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/detail/push_options.hpp>
namespace boost {
namespace asio {
/// Default invoke function for handlers.
/**
* Completion handlers for asynchronous operations are invoked by the
* io_service associated with the corresponding object (e.g. a socket or
* deadline_timer). Certain guarantees are made on when the handler may be
* invoked, in particular that a handler can only be invoked from a thread that
* is currently calling @c run() on the corresponding io_service object.
* Handlers may subsequently be invoked through other objects (such as
* io_service::strand objects) that provide additional guarantees.
*
* When asynchronous operations are composed from other asynchronous
* operations, all intermediate handlers should be invoked using the same
* method as the final handler. This is required to ensure that user-defined
* objects are not accessed in a way that may violate the guarantees. This
* hooking function ensures that the invoked method used for the final handler
* is accessible at each intermediate step.
*
* Implement asio_handler_invoke for your own handlers to specify a custom
* invocation strategy.
*
* This default implementation is simply:
* @code
* function();
* @endcode
*
* @par Example
* @code
* class my_handler;
*
* template <typename Function>
* void asio_handler_invoke(Function function, my_handler* context)
* {
* context->strand_.dispatch(function);
* }
* @endcode
*/
template <typename Function>
inline void asio_handler_invoke(Function function, ...)
{
function();
}
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_HANDLER_INVOKE_HOOK_HPP
|
Swift