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construct/include/ircd/net/wait.h
2018-02-05 21:24:34 -08:00

76 lines
2.1 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_NET_WAIT_H
namespace ircd::net
{
enum class ready :uint8_t;
struct wait_opts extern const wait_opts_default;
using wait_callback_ec = std::function<void (const error_code &)>;
using wait_callback_eptr = std::function<void (std::exception_ptr)>;
string_view reflect(const ready &);
// Asynchronous callback when ready with error_code
void wait(socket &, const wait_opts &, wait_callback_ec);
// Asynchronous callback when ready with exception_ptr (convenience)
void wait(socket &, const wait_opts &, wait_callback_eptr);
// Yields ircd::ctx for the wait condition.
void wait(socket &, const wait_opts & = wait_opts_default);
// Yields ircd::ctx for the wait condition. Won't throw the error_code.
error_code wait(nothrow_t, socket &, const wait_opts & = wait_opts_default);
// Explicit overload to return a ctx::future
ctx::future<void> wait(use_future_t, socket &, const wait_opts & = wait_opts_default);
}
/// Types of things to wait for the socket to have "ready"
enum class ircd::net::ready
:uint8_t
{
ANY, ///< Wait for anything.
READ, ///< Data is available for a read().
WRITE, ///< Space is free in the SNDBUF for a write().
ERROR, ///< Socket has an error.
};
struct ircd::net::wait_opts
{
ready type
{
ready::ANY
};
milliseconds timeout
{
-1
};
wait_opts(const ready &, const milliseconds &timeout);
wait_opts(const ready &);
wait_opts() = default;
};
inline
ircd::net::wait_opts::wait_opts(const ready &type)
:type{type}
{}
inline
ircd::net::wait_opts::wait_opts(const ready &type,
const milliseconds &timeout)
:type{type}
,timeout{timeout}
{}