mirror of
https://github.com/matrix-construct/construct
synced 2024-11-01 19:38:54 +01:00
106 lines
2.6 KiB
C++
106 lines
2.6 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_CTX_ASYNC_H
|
|
|
|
namespace ircd::ctx
|
|
{
|
|
template<class F,
|
|
class... A>
|
|
constexpr bool is_void_result();
|
|
|
|
template<class F,
|
|
class... A>
|
|
using future_void = typename std::enable_if<is_void_result<F, A...>(), future<void>>::type;
|
|
|
|
template<class F,
|
|
class... A>
|
|
using future_value = typename std::enable_if<!is_void_result<F, A...>(),
|
|
future<typename std::result_of<F (A...)>::type>>::type;
|
|
|
|
template<size_t stack_size = DEFAULT_STACK_SIZE,
|
|
context::flags flags = context::flags(0),
|
|
class F,
|
|
class... A>
|
|
future_value<F, A...> async(F&& f, A&&... a);
|
|
|
|
template<size_t stack_size = DEFAULT_STACK_SIZE,
|
|
context::flags flags = context::flags(0),
|
|
class F,
|
|
class... A>
|
|
future_void<F, A...> async(F&& f, A&&... a);
|
|
}
|
|
|
|
template<size_t stack_size,
|
|
ircd::ctx::context::flags flags,
|
|
class F,
|
|
class... A>
|
|
ircd::ctx::future_value<F, A...>
|
|
ircd::ctx::async(F&& f,
|
|
A&&... a)
|
|
{
|
|
using R = typename std::result_of<F (A...)>::type;
|
|
|
|
promise<R> p;
|
|
future<R> ret{p};
|
|
auto wrapper
|
|
{
|
|
[p(std::move(p)), func(std::bind(std::forward<F>(f), std::forward<A>(a)...))]
|
|
() mutable
|
|
{
|
|
p.set_value(func());
|
|
}
|
|
};
|
|
|
|
//TODO: DEFER_POST?
|
|
context(stack_size, std::move(wrapper), context::DETACH | context::POST | flags);
|
|
return ret;
|
|
}
|
|
|
|
template<size_t stack_size,
|
|
ircd::ctx::context::flags flags,
|
|
class F,
|
|
class... A>
|
|
ircd::ctx::future_void<F, A...>
|
|
ircd::ctx::async(F&& f,
|
|
A&&... a)
|
|
{
|
|
using R = typename std::result_of<F (A...)>::type;
|
|
|
|
auto func
|
|
{
|
|
std::bind(std::forward<F>(f), std::forward<A>(a)...)
|
|
};
|
|
|
|
promise<R> p;
|
|
future<R> ret{p};
|
|
auto wrapper
|
|
{
|
|
[p(std::move(p)), func(std::bind(std::forward<F>(f), std::forward<A>(a)...))]
|
|
() mutable
|
|
{
|
|
func();
|
|
p.set_value();
|
|
}
|
|
};
|
|
|
|
//TODO: DEFER_POST?
|
|
context(stack_size, std::move(wrapper), context::DETACH | context::POST | flags);
|
|
return ret;
|
|
}
|
|
|
|
template<class F,
|
|
class... A>
|
|
constexpr bool
|
|
ircd::ctx::is_void_result()
|
|
{
|
|
return std::is_void<typename std::result_of<F (A...)>::type>::value;
|
|
}
|