mirror of
https://github.com/matrix-construct/construct
synced 2024-11-30 02:32:43 +01:00
95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
/*
|
|
* Copyright (C) 2016 Charybdis Development Team
|
|
* Copyright (C) 2016 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_CTX_ASYNC_H
|
|
|
|
namespace ircd {
|
|
namespace ctx {
|
|
|
|
template<class F,
|
|
class... A>
|
|
constexpr bool
|
|
is_void_result()
|
|
{
|
|
return std::is_void<typename std::result_of<F (A...)>::type>::value;
|
|
}
|
|
|
|
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)
|
|
{
|
|
using R = typename std::result_of<F (A...)>::type;
|
|
|
|
auto func(std::bind(std::forward<F>(f), std::forward<A>(a)...));
|
|
auto p(std::make_shared<promise<R>>());
|
|
auto wrapper([p, func(std::move(func))]
|
|
() mutable -> void
|
|
{
|
|
p->set_value(func());
|
|
});
|
|
|
|
future<R> ret(*p);
|
|
//TODO: DEFER_POST?
|
|
context(stack_size, std::move(wrapper), context::DETACH | context::POST | flags);
|
|
return ret;
|
|
}
|
|
|
|
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)
|
|
{
|
|
using R = typename std::result_of<F (A...)>::type;
|
|
|
|
auto func(std::bind(std::forward<F>(f), std::forward<A>(a)...));
|
|
auto p(std::make_shared<promise<R>>());
|
|
auto wrapper([p, func(std::move(func))]
|
|
() mutable -> void
|
|
{
|
|
func();
|
|
p->set_value();
|
|
});
|
|
|
|
future<R> ret(*p);
|
|
//TODO: DEFER_POST?
|
|
context(stack_size, std::move(wrapper), context::DETACH | context::POST | flags);
|
|
return ret;
|
|
}
|
|
|
|
} // namespace ctx
|
|
} // namespace ircd
|