tdlight/tdactor/td/actor/impl/Scheduler-decl.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/actor/impl/Actor-decl.h"
#include "td/actor/impl/ActorId-decl.h"
#include "td/actor/impl/EventFull-decl.h"
#include "td/utils/Closure.h"
#include "td/utils/Heap.h"
#include "td/utils/List.h"
#include "td/utils/logging.h"
#include "td/utils/MovableValue.h"
#include "td/utils/MpscPollableQueue.h"
#include "td/utils/ObjectPool.h"
#include "td/utils/port/detail/PollableFd.h"
#include "td/utils/port/Poll.h"
#include "td/utils/port/PollFlags.h"
#include "td/utils/port/thread_local.h"
#include "td/utils/Slice.h"
#include "td/utils/Time.h"
#include "td/utils/type_traits.h"
#include <functional>
#include <memory>
#include <type_traits>
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#include <unordered_map>
#include <utility>
namespace td {
extern int VERBOSITY_NAME(actor);
class ActorInfo;
enum class ActorSendType { Immediate, Later, LaterWeak };
class Scheduler;
class SchedulerGuard {
public:
explicit SchedulerGuard(Scheduler *scheduler, bool lock = true);
~SchedulerGuard();
SchedulerGuard(const SchedulerGuard &other) = delete;
SchedulerGuard &operator=(const SchedulerGuard &other) = delete;
SchedulerGuard(SchedulerGuard &&other) = default;
SchedulerGuard &operator=(SchedulerGuard &&other) = delete;
private:
MovableValue<bool> is_valid_ = true;
bool is_locked_;
Scheduler *scheduler_;
ActorContext *save_context_;
Scheduler *save_scheduler_;
const char *save_tag_;
};
class Scheduler {
public:
class Callback {
public:
Callback() = default;
Callback(const Callback &) = delete;
Callback &operator=(const Callback &) = delete;
virtual ~Callback() = default;
virtual void on_finish() = 0;
virtual void register_at_finish(std::function<void()>) = 0;
};
Scheduler() = default;
Scheduler(const Scheduler &) = delete;
Scheduler &operator=(const Scheduler &) = delete;
Scheduler(Scheduler &&) = delete;
Scheduler &operator=(Scheduler &&) = delete;
~Scheduler();
void init();
void init(int32 id, std::vector<std::shared_ptr<MpscPollableQueue<EventFull>>> outbound, Callback *callback);
void clear();
int32 sched_id() const;
int32 sched_count() const;
template <class ActorT, class... Args>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> create_actor(Slice name, Args &&... args);
template <class ActorT, class... Args>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> create_actor_on_scheduler(Slice name, int32 sched_id, Args &&... args);
template <class ActorT>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> register_actor(Slice name, ActorT *actor_ptr, int32 sched_id = -1);
template <class ActorT>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> register_actor(Slice name, unique_ptr<ActorT> actor_ptr, int32 sched_id = -1);
template <class ActorT>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> register_existing_actor(unique_ptr<ActorT> actor_ptr);
void send_to_scheduler(int32 sched_id, const ActorId<> &actor_id, Event &&event);
void send_to_other_scheduler(int32 sched_id, const ActorId<> &actor_id, Event &&event);
template <ActorSendType send_type, class EventT>
void send_lambda(ActorRef actor_ref, EventT &&lambda);
template <ActorSendType send_type, class EventT>
void send_closure(ActorRef actor_ref, EventT &&closure);
template <ActorSendType send_type>
void send(ActorRef actor_ref, Event &&event);
void before_tail_send(const ActorId<> &actor_id);
static void subscribe(PollableFd fd, PollFlags flags = PollFlags::ReadWrite());
static void unsubscribe(PollableFdRef fd);
static void unsubscribe_before_close(PollableFdRef fd);
void yield_actor(Actor *actor);
void stop_actor(Actor *actor);
void do_stop_actor(Actor *actor);
uint64 get_link_token(Actor *actor);
void migrate_actor(Actor *actor, int32 dest_sched_id);
void do_migrate_actor(Actor *actor, int32 dest_sched_id);
void start_migrate_actor(Actor *actor, int32 dest_sched_id);
void finish_migrate_actor(Actor *actor);
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double get_actor_timeout(const Actor *actor) const;
void set_actor_timeout_in(Actor *actor, double timeout);
void set_actor_timeout_at(Actor *actor, double timeout_at);
void cancel_actor_timeout(Actor *actor);
void finish();
void yield();
void run(Timestamp timeout);
void run_no_guard(Timestamp timeout);
void wakeup();
static Scheduler *instance();
static ActorContext *&context();
static void on_context_updated();
SchedulerGuard get_guard();
SchedulerGuard get_const_guard();
Timestamp get_timeout();
private:
static void set_scheduler(Scheduler *scheduler);
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class ServiceActor final : public Actor {
public:
void set_queue(std::shared_ptr<MpscPollableQueue<EventFull>> queues);
private:
std::shared_ptr<MpscPollableQueue<EventFull>> inbound_;
bool subscribed_{false};
void start_up() final;
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void loop() final;
void tear_down() final;
};
friend class ServiceActor;
void do_event(ActorInfo *actor, Event &&event);
void enter_actor(ActorInfo *actor_info);
void exit_actor(ActorInfo *actor_info);
void yield_actor(ActorInfo *actor_info);
void stop_actor(ActorInfo *actor_info);
void do_stop_actor(ActorInfo *actor_info);
uint64 get_link_token(ActorInfo *actor_info);
void migrate_actor(ActorInfo *actor_info, int32 dest_sched_id);
void do_migrate_actor(ActorInfo *actor_info, int32 dest_sched_id);
void start_migrate_actor(ActorInfo *actor_info, int32 dest_sched_id);
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double get_actor_timeout(const ActorInfo *actor_info) const;
void set_actor_timeout_in(ActorInfo *actor_info, double timeout);
void set_actor_timeout_at(ActorInfo *actor_info, double timeout_at);
void cancel_actor_timeout(ActorInfo *actor_info);
void register_migrated_actor(ActorInfo *actor_info);
void add_to_mailbox(ActorInfo *actor_info, Event &&event);
void clear_mailbox(ActorInfo *actor_info);
template <class RunFuncT, class EventFuncT>
void flush_mailbox(ActorInfo *actor_info, const RunFuncT &run_func, const EventFuncT &event_func);
template <ActorSendType send_type, class RunFuncT, class EventFuncT>
void send_impl(const ActorId<> &actor_id, const RunFuncT &run_func, const EventFuncT &event_func);
void inc_wait_generation();
Timestamp run_timeout();
void run_mailbox();
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Timestamp run_events(Timestamp timeout);
void run_poll(Timestamp timeout);
template <class ActorT>
ActorOwn<ActorT> register_actor_impl(Slice name, ActorT *actor_ptr, Actor::Deleter deleter, int32 sched_id);
void destroy_actor(ActorInfo *actor_info);
static TD_THREAD_LOCAL Scheduler *scheduler_;
static TD_THREAD_LOCAL ActorContext *context_;
Callback *callback_ = nullptr;
unique_ptr<ObjectPool<ActorInfo>> actor_info_pool_;
int32 actor_count_ = 0;
ListNode pending_actors_list_;
ListNode ready_actors_list_;
KHeap<double> timeout_queue_;
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std::unordered_map<ActorInfo *, std::vector<Event>> pending_events_;
ServiceActor service_actor_;
Poll poll_;
bool yield_flag_ = false;
bool has_guard_ = false;
bool close_flag_ = false;
uint32 wait_generation_ = 1;
int32 sched_id_ = 0;
int32 sched_n_ = 0;
std::shared_ptr<MpscPollableQueue<EventFull>> inbound_queue_;
std::vector<std::shared_ptr<MpscPollableQueue<EventFull>>> outbound_queues_;
std::shared_ptr<ActorContext> save_context_;
struct EventContext {
int32 dest_sched_id{0};
enum Flags { Stop = 1, Migrate = 2 };
int32 flags{0};
uint64 link_token{0};
ActorInfo *actor_info{nullptr};
};
EventContext *event_context_ptr_{nullptr};
friend class GlobalScheduler;
friend class SchedulerGuard;
friend class EventGuard;
};
/*** Interface to current scheduler ***/
template <class ActorT, class... Args>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> create_actor(Slice name, Args &&... args);
template <class ActorT, class... Args>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> create_actor_on_scheduler(Slice name, int32 sched_id, Args &&... args);
template <class ActorT>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> register_actor(Slice name, ActorT *actor_ptr, int32 sched_id = -1);
template <class ActorT>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> register_actor(Slice name, unique_ptr<ActorT> actor_ptr, int32 sched_id = -1);
template <class ActorT>
TD_WARN_UNUSED_RESULT ActorOwn<ActorT> register_existing_actor(unique_ptr<ActorT> actor_ptr);
template <class ActorIdT, class FunctionT, class... ArgsT>
void send_closure(ActorIdT &&actor_id, FunctionT function, ArgsT &&... args) {
using ActorT = typename std::decay_t<ActorIdT>::ActorT;
using FunctionClassT = member_function_class_t<FunctionT>;
static_assert(std::is_base_of<FunctionClassT, ActorT>::value, "unsafe send_closure");
Scheduler::instance()->send_closure<ActorSendType::Immediate>(
std::forward<ActorIdT>(actor_id), create_immediate_closure(function, std::forward<ArgsT>(args)...));
}
template <class ActorIdT, class FunctionT, class... ArgsT>
void send_closure_later(ActorIdT &&actor_id, FunctionT function, ArgsT &&... args) {
using ActorT = typename std::decay_t<ActorIdT>::ActorT;
using FunctionClassT = member_function_class_t<FunctionT>;
static_assert(std::is_base_of<FunctionClassT, ActorT>::value, "unsafe send_closure");
Scheduler::instance()->send<ActorSendType::Later>(std::forward<ActorIdT>(actor_id),
Event::delayed_closure(function, std::forward<ArgsT>(args)...));
}
template <class... ArgsT>
void send_lambda(ActorRef actor_ref, ArgsT &&... args) {
Scheduler::instance()->send_lambda<ActorSendType::Immediate>(actor_ref, std::forward<ArgsT>(args)...);
}
template <class... ArgsT>
void send_event(ActorRef actor_ref, ArgsT &&... args) {
Scheduler::instance()->send<ActorSendType::Immediate>(actor_ref, std::forward<ArgsT>(args)...);
}
template <class... ArgsT>
void send_event_later(ActorRef actor_ref, ArgsT &&... args) {
Scheduler::instance()->send<ActorSendType::Later>(actor_ref, std::forward<ArgsT>(args)...);
}
void yield_scheduler();
} // namespace td