165 lines
4.0 KiB
C++
165 lines
4.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/actor/impl/ConcurrentScheduler.h"
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#include "td/actor/impl/Actor.h"
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#include "td/actor/impl/ActorId.h"
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#include "td/actor/impl/ActorInfo.h"
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#include "td/actor/impl/Scheduler.h"
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#include "td/utils/MpscPollableQueue.h"
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#include "td/utils/port/thread_local.h"
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#include <memory>
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namespace td {
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void ConcurrentScheduler::init(int32 threads_n) {
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#if TD_THREAD_UNSUPPORTED || TD_EVENTFD_UNSUPPORTED
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threads_n = 0;
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#endif
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threads_n++;
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std::vector<std::shared_ptr<MpscPollableQueue<EventFull>>> outbound(threads_n);
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#if !TD_THREAD_UNSUPPORTED && !TD_EVENTFD_UNSUPPORTED
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for (int32 i = 0; i < threads_n; i++) {
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auto queue = std::make_shared<MpscPollableQueue<EventFull>>();
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queue->init();
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outbound[i] = queue;
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}
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#endif
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// +1 for extra scheduler for IOCP and send_closure from unrelated threads
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// It will know about other schedulers
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// Other schedulers will have no idea about its existence
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extra_scheduler_ = 1;
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#if TD_THREAD_UNSUPPORTED || TD_EVENTFD_UNSUPPORTED
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extra_scheduler_ = 0;
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#endif
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schedulers_.resize(threads_n + extra_scheduler_);
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for (int32 i = 0; i < threads_n + extra_scheduler_; i++) {
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auto &sched = schedulers_[i];
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sched = make_unique<Scheduler>();
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#if !TD_THREAD_UNSUPPORTED && !TD_EVENTFD_UNSUPPORTED
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if (i >= threads_n) {
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auto queue = std::make_shared<MpscPollableQueue<EventFull>>();
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queue->init();
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outbound.push_back(std::move(queue));
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}
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#endif
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sched->init(i, outbound, static_cast<Scheduler::Callback *>(this));
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}
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#if TD_PORT_WINDOWS
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iocp_ = make_unique<detail::Iocp>();
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iocp_->init();
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#endif
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state_ = State::Start;
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}
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void ConcurrentScheduler::test_one_thread_run() {
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do {
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for (auto &sched : schedulers_) {
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sched->run(Timestamp::now_cached());
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}
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} while (!is_finished_.load(std::memory_order_relaxed));
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}
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void ConcurrentScheduler::start() {
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CHECK(state_ == State::Start);
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is_finished_.store(false, std::memory_order_relaxed);
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#if !TD_THREAD_UNSUPPORTED && !TD_EVENTFD_UNSUPPORTED
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for (size_t i = 1; i + extra_scheduler_ < schedulers_.size(); i++) {
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auto &sched = schedulers_[i];
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threads_.push_back(td::thread([&]() {
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#if TD_PORT_WINDOWS
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detail::Iocp::Guard iocp_guard(iocp_.get());
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#endif
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while (!is_finished()) {
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sched->run(Timestamp::in(10));
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}
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}));
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}
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#if TD_PORT_WINDOWS
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iocp_thread_ = td::thread([this] {
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auto guard = this->get_send_guard();
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this->iocp_->loop();
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});
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#endif
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#endif
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state_ = State::Run;
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}
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static TD_THREAD_LOCAL double emscripten_timeout;
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bool ConcurrentScheduler::run_main(Timestamp timeout) {
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CHECK(state_ == State::Run);
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// run main scheduler in same thread
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auto &main_sched = schedulers_[0];
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if (!is_finished()) {
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#if TD_PORT_WINDOWS
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detail::Iocp::Guard iocp_guard(iocp_.get());
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#endif
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main_sched->run(timeout);
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}
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// hack for emscripten
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emscripten_timeout = get_main_timeout().at();
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return !is_finished();
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}
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Timestamp ConcurrentScheduler::get_main_timeout() {
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CHECK(state_ == State::Run);
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return schedulers_[0]->get_timeout();
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}
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double ConcurrentScheduler::emscripten_get_main_timeout() {
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return Timestamp::at(emscripten_timeout).in();
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}
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void ConcurrentScheduler::emscripten_clear_main_timeout() {
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emscripten_timeout = 0;
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}
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void ConcurrentScheduler::finish() {
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CHECK(state_ == State::Run);
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if (!is_finished()) {
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on_finish();
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}
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#if TD_PORT_WINDOWS
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SCOPE_EXIT {
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iocp_->clear();
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};
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detail::Iocp::Guard iocp_guard(iocp_.get());
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#endif
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#if !TD_THREAD_UNSUPPORTED && !TD_EVENTFD_UNSUPPORTED
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for (auto &thread : threads_) {
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thread.join();
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}
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threads_.clear();
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#endif
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#if TD_PORT_WINDOWS
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iocp_->interrupt_loop();
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iocp_thread_.join();
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#endif
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schedulers_.clear();
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for (auto &f : at_finish_) {
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f();
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}
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at_finish_.clear();
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state_ = State::Start;
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}
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} // namespace td
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