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tdlib-fork/td/telegram/Client.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// 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)
//
#include "td/telegram/Client.h"
#include "td/telegram/Td.h"
#include "td/actor/actor.h"
#include "td/utils/common.h"
#include "td/utils/crypto.h"
#include "td/utils/logging.h"
#include "td/utils/MpscPollableQueue.h"
#include "td/utils/port/thread.h"
#include <atomic>
#include <deque>
#include <memory>
#include <mutex>
#include <unordered_map>
namespace td {
#if TD_THREAD_UNSUPPORTED || TD_EVENTFD_UNSUPPORTED
class Client::Impl final {
public:
Impl() {
concurrent_scheduler_ = make_unique<ConcurrentScheduler>();
concurrent_scheduler_->init(0);
class Callback : public TdCallback {
public:
explicit Callback(Impl *client) : client_(client) {
}
void on_result(std::uint64_t id, td_api::object_ptr<td_api::Object> result) override {
client_->responses_.push_back({id, std::move(result)});
}
void on_error(std::uint64_t id, td_api::object_ptr<td_api::error> error) override {
client_->responses_.push_back({id, std::move(error)});
}
Callback(const Callback &) = delete;
Callback &operator=(const Callback &) = delete;
Callback(Callback &&) = delete;
Callback &operator=(Callback &&) = delete;
~Callback() override {
client_->closed_ = true;
Scheduler::instance()->yield();
}
private:
Impl *client_;
};
td_ = concurrent_scheduler_->create_actor_unsafe<Td>(0, "Td", make_unique<Callback>(this));
concurrent_scheduler_->start();
}
void send(Request request) {
requests_.push_back(std::move(request));
}
Response receive(double timeout) {
if (!requests_.empty()) {
auto guard = concurrent_scheduler_->get_main_guard();
for (auto &request : requests_) {
send_closure_later(td_, &Td::request, request.id, std::move(request.function));
}
requests_.clear();
}
if (responses_.empty()) {
concurrent_scheduler_->run_main(0);
} else {
ConcurrentScheduler::emscripten_clear_main_timeout();
}
if (!responses_.empty()) {
auto result = std::move(responses_.front());
responses_.pop_front();
return result;
}
return {0, nullptr};
}
Impl(const Impl &) = delete;
Impl &operator=(const Impl &) = delete;
Impl(Impl &&) = delete;
Impl &operator=(Impl &&) = delete;
~Impl() {
{
auto guard = concurrent_scheduler_->get_main_guard();
td_.reset();
}
while (!closed_) {
concurrent_scheduler_->run_main(0);
}
concurrent_scheduler_.reset();
}
private:
std::deque<Response> responses_;
std::vector<Request> requests_;
unique_ptr<ConcurrentScheduler> concurrent_scheduler_;
ActorOwn<Td> td_;
bool closed_ = false;
};
#else
class MultiTd : public Actor {
public:
void create(int32 td_id, unique_ptr<TdCallback> callback) {
auto &td = tds_[td_id];
CHECK(td.empty());
string name = "Td";
if (td_id != 0) {
name += PSTRING() << '#' << td_id;
}
td = create_actor<Td>(name, std::move(callback));
}
void send(int32 td_id, Client::Request request) {
auto &td = tds_[td_id];
CHECK(!td.empty());
send_closure(td, &Td::request, request.id, std::move(request.function));
}
void destroy(int32 td_id) {
auto size = tds_.erase(td_id);
CHECK(size == 1);
}
private:
std::unordered_map<int32, ActorOwn<Td> > tds_;
};
class MultiImpl {
public:
static std::shared_ptr<MultiImpl> get() {
static std::mutex mutex;
static std::weak_ptr<MultiImpl> impl;
std::unique_lock<std::mutex> lock(mutex);
auto res = impl.lock();
if (!res) {
res = std::make_shared<MultiImpl>();
impl = res;
}
return res;
}
MultiImpl() {
concurrent_scheduler_ = std::make_shared<ConcurrentScheduler>();
concurrent_scheduler_->init(3);
concurrent_scheduler_->start();
{
auto guard = concurrent_scheduler_->get_main_guard();
multi_td_ = create_actor<MultiTd>("MultiTd");
}
scheduler_thread_ = thread([concurrent_scheduler = concurrent_scheduler_] {
while (concurrent_scheduler->run_main(10)) {
}
concurrent_scheduler->finish();
});
}
MultiImpl(const MultiImpl &) = delete;
MultiImpl &operator=(const MultiImpl &) = delete;
MultiImpl(MultiImpl &&) = delete;
MultiImpl &operator=(MultiImpl &&) = delete;
int32 create_id() {
return id_.fetch_add(1) + 1;
}
void create(int32 td_id, unique_ptr<TdCallback> callback) {
auto guard = concurrent_scheduler_->get_send_guard();
send_closure(multi_td_, &MultiTd::create, td_id, std::move(callback));
}
void send(int32 td_id, Client::Request request) {
auto guard = concurrent_scheduler_->get_send_guard();
send_closure(multi_td_, &MultiTd::send, td_id, std::move(request));
}
void destroy(int32 td_id) {
auto guard = concurrent_scheduler_->get_send_guard();
send_closure(multi_td_, &MultiTd::destroy, td_id);
}
~MultiImpl() {
{
auto guard = concurrent_scheduler_->get_send_guard();
multi_td_.reset();
Scheduler::instance()->finish();
}
scheduler_thread_.join();
}
private:
std::shared_ptr<ConcurrentScheduler> concurrent_scheduler_;
thread scheduler_thread_;
ActorOwn<MultiTd> multi_td_;
std::atomic<int32> id_{0};
};
class Client::Impl final {
public:
using OutputQueue = MpscPollableQueue<Client::Response>;
Impl() {
multi_impl_ = MultiImpl::get();
td_id_ = multi_impl_->create_id();
output_queue_ = std::make_shared<OutputQueue>();
output_queue_->init();
class Callback : public TdCallback {
public:
explicit Callback(std::shared_ptr<OutputQueue> output_queue) : output_queue_(std::move(output_queue)) {
}
void on_result(std::uint64_t id, td_api::object_ptr<td_api::Object> result) override {
output_queue_->writer_put({id, std::move(result)});
}
void on_error(std::uint64_t id, td_api::object_ptr<td_api::error> error) override {
output_queue_->writer_put({id, std::move(error)});
}
Callback(const Callback &) = delete;
Callback &operator=(const Callback &) = delete;
Callback(Callback &&) = delete;
Callback &operator=(Callback &&) = delete;
~Callback() override {
output_queue_->writer_put({0, nullptr});
}
private:
std::shared_ptr<OutputQueue> output_queue_;
};
multi_impl_->create(td_id_, td::make_unique<Callback>(output_queue_));
}
void send(Client::Request request) {
if (request.id == 0 || request.function == nullptr) {
LOG(ERROR) << "Drop wrong request " << request.id;
return;
}
multi_impl_->send(td_id_, std::move(request));
}
Client::Response receive(double timeout) {
VLOG(td_requests) << "Begin to wait for updates with timeout " << timeout;
auto is_locked = receive_lock_.exchange(true);
CHECK(!is_locked);
auto response = receive_unlocked(timeout);
is_locked = receive_lock_.exchange(false);
CHECK(is_locked);
VLOG(td_requests) << "End to wait for updates, returning object " << response.id << ' ' << response.object.get();
return response;
}
Impl(const Impl &) = delete;
Impl &operator=(const Impl &) = delete;
Impl(Impl &&) = delete;
Impl &operator=(Impl &&) = delete;
~Impl() {
multi_impl_->destroy(td_id_);
while (!is_closed_) {
receive(10);
}
}
private:
std::shared_ptr<MultiImpl> multi_impl_;
std::shared_ptr<OutputQueue> output_queue_;
int output_queue_ready_cnt_{0};
std::atomic<bool> receive_lock_{false};
bool is_closed_{false};
int32 td_id_;
Client::Response receive_unlocked(double timeout) {
if (output_queue_ready_cnt_ == 0) {
output_queue_ready_cnt_ = output_queue_->reader_wait_nonblock();
}
if (output_queue_ready_cnt_ > 0) {
output_queue_ready_cnt_--;
auto res = output_queue_->reader_get_unsafe();
if (res.object == nullptr && res.id == 0) {
is_closed_ = true;
}
return res;
}
if (timeout != 0) {
output_queue_->reader_get_event_fd().wait(static_cast<int>(timeout * 1000));
return receive_unlocked(0);
}
return {0, nullptr};
}
};
#endif
Client::Client() : impl_(std::make_unique<Impl>()) {
// At least it should be enough for everybody who uses TDLib
init_openssl_threads();
}
void Client::send(Request &&request) {
impl_->send(std::move(request));
}
Client::Response Client::receive(double timeout) {
return impl_->receive(timeout);
}
Client::Response Client::execute(Request &&request) {
Response response;
response.id = request.id;
response.object = Td::static_request(std::move(request.function));
return response;
}
Client::~Client() = default;
Client::Client(Client &&other) = default;
Client &Client::operator=(Client &&other) = default;
} // namespace td