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#pragma once
#include "poller.h"
#include "sockmap.h"
#include <library/cpp/containers/intrusive_rb_tree/rb_tree.h>
#include <util/datetime/base.h>
#include <util/memory/pool.h>
#include <util/memory/smallobj.h>
#include <util/network/init.h>
#include <cerrno>
class TCont;
class TContExecutor;
class TFdEvent;
namespace NCoro {
class IPollEvent;
struct TContPollEventCompare {
template <class T>
static inline bool Compare(const T& l, const T& r) noexcept {
return l.DeadLine() < r.DeadLine() || (l.DeadLine() == r.DeadLine() && &l < &r);
}
};
class TContPollEvent : public TRbTreeItem<TContPollEvent, TContPollEventCompare> {
public:
TContPollEvent(TCont* cont, TInstant deadLine) noexcept
: Cont_(cont)
, DeadLine_(deadLine)
{}
static bool Compare(const TContPollEvent& l, const TContPollEvent& r) noexcept {
return l.DeadLine() < r.DeadLine() || (l.DeadLine() == r.DeadLine() && &l < &r);
}
int Status() const noexcept {
return Status_;
}
void SetStatus(int status) noexcept {
Status_ = status;
}
TCont* Cont() noexcept {
return Cont_;
}
TInstant DeadLine() const noexcept {
return DeadLine_;
}
void Wake(int status) noexcept {
SetStatus(status);
Wake();
}
private:
void Wake() noexcept;
private:
TCont* Cont_;
TInstant DeadLine_;
int Status_ = EINPROGRESS;
};
class IPollEvent: public TIntrusiveListItem<IPollEvent> {
public:
IPollEvent(SOCKET fd, ui16 what) noexcept
: Fd_(fd)
, What_(what)
{}
virtual ~IPollEvent() {}
SOCKET Fd() const noexcept {
return Fd_;
}
int What() const noexcept {
return What_;
}
virtual void OnPollEvent(int status) noexcept = 0;
private:
SOCKET Fd_;
ui16 What_;
};
template <class T>
class TBigArray {
struct TValue: public T, public TObjectFromPool<TValue> {
TValue() {}
};
public:
TBigArray()
: Pool_(TMemoryPool::TExpGrow::Instance(), TDefaultAllocator::Instance())
{}
T* Get(size_t index) {
TRef& ret = Lst_.Get(index);
if (!ret) {
ret = TRef(new (&Pool_) TValue());
}
return ret.Get();
}
private:
using TRef = THolder<TValue>;
typename TValue::TPool Pool_;
TSocketMap<TRef> Lst_;
};
using TPollEventList = TIntrusiveList<IPollEvent>;
class TContPoller {
public:
using TEvent = IPollerFace::TEvent;
using TEvents = IPollerFace::TEvents;
TContPoller()
: P_(IPollerFace::Default())
{
}
explicit TContPoller(THolder<IPollerFace> poller)
: P_(std::move(poller))
{}
void Schedule(IPollEvent* event) {
auto* lst = Lists_.Get(event->Fd());
const ui16 oldFlags = Flags(*lst);
lst->PushFront(event);
ui16 newFlags = Flags(*lst);
if (newFlags != oldFlags) {
if (oldFlags) {
newFlags |= CONT_POLL_MODIFY;
}
P_->Set(lst, event->Fd(), newFlags);
}
}
void Remove(IPollEvent* event) noexcept {
auto* lst = Lists_.Get(event->Fd());
const ui16 oldFlags = Flags(*lst);
event->Unlink();
ui16 newFlags = Flags(*lst);
if (newFlags != oldFlags) {
if (newFlags) {
newFlags |= CONT_POLL_MODIFY;
}
P_->Set(lst, event->Fd(), newFlags);
}
}
void Wait(TEvents& events, TInstant deadLine) {
events.clear();
P_->Wait(events, deadLine);
}
EContPoller PollEngine() const {
return P_->PollEngine();
}
private:
static ui16 Flags(TIntrusiveList<IPollEvent>& lst) noexcept {
ui16 ret = 0;
for (auto&& item : lst) {
ret |= item.What();
}
return ret;
}
private:
TBigArray<TPollEventList> Lists_;
THolder<IPollerFace> P_;
};
class TEventWaitQueue {
using TIoWait = TRbTree<NCoro::TContPollEvent, NCoro::TContPollEventCompare>;
public:
void Register(NCoro::TContPollEvent* event);
bool Empty() const noexcept {
return IoWait_.Empty();
}
void Abort() noexcept;
TInstant WakeTimedout(TInstant now) noexcept;
private:
TIoWait IoWait_;
};
}
class TFdEvent final:
public NCoro::TContPollEvent,
public NCoro::IPollEvent
{
public:
TFdEvent(TCont* cont, SOCKET fd, ui16 what, TInstant deadLine) noexcept
: TContPollEvent(cont, deadLine)
, IPollEvent(fd, what)
{}
~TFdEvent() {
RemoveFromIOWait();
}
void RemoveFromIOWait() noexcept;
void OnPollEvent(int status) noexcept override {
Wake(status);
}
};
class TTimerEvent: public NCoro::TContPollEvent {
public:
TTimerEvent(TCont* cont, TInstant deadLine) noexcept
: TContPollEvent(cont, deadLine)
{}
};
int ExecuteEvent(TFdEvent* event) noexcept;
int ExecuteEvent(TTimerEvent* event) noexcept;
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