mirror of
https://github.com/matrix-construct/construct
synced 2024-11-29 18:22:50 +01:00
d9a4f06bf6
This is not a move to c++17. If the compiler happens to have support for c++17 namespace scope resolution, they have been kind enough to backport it to gnu++14. This limits our support for really old c++14 compilers, but that was limited anyway. GCC 6.1 and clang 3.6 tested.
147 lines
3.1 KiB
C++
147 lines
3.1 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_QUEUE_H
|
|
|
|
namespace ircd::ctx
|
|
{
|
|
template<class T> class queue;
|
|
}
|
|
|
|
template<class T>
|
|
class ircd::ctx::queue
|
|
{
|
|
struct dock dock;
|
|
std::queue<T> q;
|
|
|
|
public:
|
|
auto empty() const { return q.empty(); }
|
|
auto size() const { return q.size(); }
|
|
|
|
// Consumer interface; waits for item and std::move() it off the queue
|
|
template<class time_point> T pop_until(time_point&&);
|
|
template<class duration> T pop_for(const duration &);
|
|
T pop();
|
|
|
|
// Producer interface; emplace item on the queue and notify consumer
|
|
template<class... args> void emplace(args&&...);
|
|
void push(const T &);
|
|
void push(T &&) noexcept;
|
|
|
|
queue() = default;
|
|
~queue() noexcept;
|
|
};
|
|
|
|
template<class T>
|
|
ircd::ctx::queue<T>::~queue()
|
|
noexcept
|
|
{
|
|
assert(q.empty());
|
|
}
|
|
|
|
template<class T>
|
|
void
|
|
ircd::ctx::queue<T>::push(T &&t)
|
|
noexcept
|
|
{
|
|
q.push(std::move(t));
|
|
dock.notify();
|
|
}
|
|
|
|
template<class T>
|
|
void
|
|
ircd::ctx::queue<T>::push(const T &t)
|
|
{
|
|
q.push(t);
|
|
dock.notify();
|
|
}
|
|
|
|
template<class T>
|
|
template<class... args>
|
|
void
|
|
ircd::ctx::queue<T>::emplace(args&&... a)
|
|
{
|
|
q.emplace(std::forward<args>(a)...);
|
|
dock.notify();
|
|
}
|
|
|
|
template<class T>
|
|
T
|
|
ircd::ctx::queue<T>::pop()
|
|
{
|
|
dock.wait([this]
|
|
{
|
|
return !q.empty();
|
|
});
|
|
|
|
const scope pop([this]
|
|
{
|
|
q.pop();
|
|
});
|
|
|
|
auto &ret(q.front());
|
|
return std::move(ret);
|
|
}
|
|
|
|
template<class T>
|
|
template<class duration>
|
|
T
|
|
ircd::ctx::queue<T>::pop_for(const duration &dur)
|
|
{
|
|
const auto status(dock.wait_for(dur, [this]
|
|
{
|
|
return !q.empty();
|
|
}));
|
|
|
|
if(status == cv_status::timeout)
|
|
throw timeout();
|
|
|
|
const scope pop([this]
|
|
{
|
|
q.pop();
|
|
});
|
|
|
|
auto &ret(q.front());
|
|
return std::move(ret);
|
|
}
|
|
|
|
template<class T>
|
|
template<class time_point>
|
|
T
|
|
ircd::ctx::queue<T>::pop_until(time_point&& tp)
|
|
{
|
|
const auto status(dock.wait_until(tp, [this]
|
|
{
|
|
return !q.empty();
|
|
}));
|
|
|
|
if(status == cv_status::timeout)
|
|
throw timeout();
|
|
|
|
const scope pop([this]
|
|
{
|
|
q.pop();
|
|
});
|
|
|
|
auto &ret(q.front());
|
|
return std::move(ret);
|
|
}
|