mirror of
https://github.com/matrix-construct/construct
synced 2024-11-03 12:28:52 +01:00
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
/*
|
|
* charybdis: oh just a little chat server
|
|
* ctx.h: userland context switching (stackful coroutines)
|
|
*
|
|
* 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_CONTEXT_H
|
|
|
|
namespace ircd {
|
|
namespace ctx {
|
|
|
|
const size_t DEFAULT_STACK_SIZE
|
|
{
|
|
64_KiB
|
|
};
|
|
|
|
struct context
|
|
{
|
|
enum flags
|
|
{
|
|
POST = 1U << 0, // Defers spawn with an ios.post()
|
|
DISPATCH = 1U << 1, // (Defers) spawn with an ios.dispatch()
|
|
DETACH = 1U << 2, // Context deletes itself; see struct context constructor notes
|
|
INTERRUPTED = 1U << 3, // Marked
|
|
};
|
|
|
|
private:
|
|
std::unique_ptr<ctx> c;
|
|
|
|
public:
|
|
operator const ctx &() const { return *c; }
|
|
operator ctx &() { return *c; }
|
|
|
|
bool operator!() const { return !c; }
|
|
operator bool() const { return bool(c); }
|
|
bool joined() const { return !c || ircd::ctx::finished(*c); }
|
|
|
|
void interrupt() { ircd::ctx::interrupt(*c); }
|
|
void join(); // Blocks the current context until this one finishes
|
|
ctx *detach(); // other calls undefined after this call
|
|
|
|
// Note: Constructing with DETACH flag makes any further use of this object undefined.
|
|
context(const char *const &name,
|
|
const size_t &stack_size,
|
|
const flags &,
|
|
std::function<void ()>);
|
|
|
|
context(const char *const &name,
|
|
const size_t &stack_size,
|
|
std::function<void ()>,
|
|
const flags & = (flags)0);
|
|
|
|
context(const char *const &name,
|
|
const flags &,
|
|
std::function<void ()>);
|
|
|
|
context(const char *const &name,
|
|
std::function<void ()>,
|
|
const flags & = (flags)0);
|
|
|
|
context(std::function<void ()>,
|
|
const flags & = (flags)0);
|
|
|
|
context() = default;
|
|
context(context &&) = default;
|
|
context(const context &) = delete;
|
|
context &operator=(context &&) = default;
|
|
context &operator=(const context &) = delete;
|
|
~context() noexcept;
|
|
|
|
friend void swap(context &a, context &b) noexcept;
|
|
};
|
|
|
|
inline void
|
|
swap(context &a, context &b)
|
|
noexcept
|
|
{
|
|
std::swap(a.c, b.c);
|
|
}
|
|
|
|
} // namespace ctx
|
|
} // namespace ircd
|