mirror of
https://github.com/ArthurSonzogni/FTXUI.git
synced 2024-10-06 12:03:35 +08:00
406355df8c
The ESC key generates sequences that are prefix of others. For instance: - ESC => [27] - F1 => [27, 79, 8] As a result, we can't generate the ESC event when receiving [27], because it might be the start of the [27, 79, 8] sequence (or not). Application usually applies a timeout to help detecting the ESC key. This patch introduce a timeout. It is set to 50ms. Bug: https://github.com/ArthurSonzogni/FTXUI/issues/55
124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
#ifndef FTXUI_COMPONENT_RECEIVER_HPP_
|
|
#define FTXUI_COMPONENT_RECEIVER_HPP_
|
|
|
|
#include <atomic>
|
|
#include <condition_variable>
|
|
#include <functional>
|
|
#include <iostream>
|
|
#include <memory>
|
|
#include <mutex>
|
|
#include <queue>
|
|
|
|
namespace ftxui {
|
|
|
|
// Usage:
|
|
//
|
|
// Initialization:
|
|
// ---------------
|
|
//
|
|
// auto receiver = MakeReceiver<std:string>();
|
|
// auto sender_1= receiver->MakeSender();
|
|
// auto sender_2 = receiver->MakeSender();
|
|
//
|
|
// Then move the senders elsewhere, potentially in a different thread.
|
|
//
|
|
// On the producer side:
|
|
// ----------------------
|
|
// [thread 1] sender_1->Send("hello");
|
|
// [thread 2] sender_2->Send("world");
|
|
//
|
|
// On the consumer side:
|
|
// ---------------------
|
|
// char c;
|
|
// while(receiver->Receive(&c)) // Return true as long as there is a producer.
|
|
// print(c)
|
|
//
|
|
// Receiver::Receive() returns true when there are no more senders.
|
|
|
|
// clang-format off
|
|
template<class T> class SenderImpl;
|
|
template<class T> class ReceiverImpl;
|
|
template<class T> using Sender = std::unique_ptr<SenderImpl<T>>;
|
|
template<class T> using Receiver = std::unique_ptr<ReceiverImpl<T>>;
|
|
template<class T> Receiver<T> MakeReceiver();
|
|
// clang-format on
|
|
|
|
// ---- Implementation part ----
|
|
|
|
template <class T>
|
|
class SenderImpl {
|
|
public:
|
|
void Send(T t) { receiver_->Receive(std::move(t)); }
|
|
~SenderImpl() { receiver_->ReleaseSender(); }
|
|
|
|
Sender<T> Clone() { return receiver_->MakeSender(); }
|
|
|
|
private:
|
|
friend class ReceiverImpl<T>;
|
|
SenderImpl(ReceiverImpl<T>* consumer) : receiver_(consumer) {}
|
|
ReceiverImpl<T>* receiver_;
|
|
};
|
|
|
|
template <class T>
|
|
class ReceiverImpl {
|
|
public:
|
|
Sender<T> MakeSender() {
|
|
std::unique_lock<std::mutex> lock(mutex_);
|
|
senders_++;
|
|
return std::unique_ptr<SenderImpl<T>>(new SenderImpl<T>(this));
|
|
}
|
|
|
|
bool Receive(T* t) {
|
|
while (senders_ || !queue_.empty()) {
|
|
std::unique_lock<std::mutex> lock(mutex_);
|
|
if (queue_.empty())
|
|
notifier_.wait(lock);
|
|
if (queue_.empty())
|
|
continue;
|
|
*t = std::move(queue_.front());
|
|
queue_.pop();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool HasPending() {
|
|
std::unique_lock<std::mutex> lock(mutex_);
|
|
return !queue_.empty();
|
|
}
|
|
|
|
private:
|
|
friend class SenderImpl<T>;
|
|
|
|
void Receive(T t) {
|
|
{
|
|
std::unique_lock<std::mutex> lock(mutex_);
|
|
queue_.push(std::move(t));
|
|
}
|
|
notifier_.notify_one();
|
|
}
|
|
|
|
void ReleaseSender() {
|
|
senders_--;
|
|
notifier_.notify_one();
|
|
}
|
|
|
|
std::mutex mutex_;
|
|
std::queue<T> queue_;
|
|
std::condition_variable notifier_;
|
|
std::atomic<int> senders_ = 0;
|
|
};
|
|
|
|
template <class T>
|
|
Receiver<T> MakeReceiver() {
|
|
return std::make_unique<ReceiverImpl<T>>();
|
|
}
|
|
|
|
} // namespace ftxui
|
|
|
|
#endif // FTXUI_COMPONENT_RECEIVER_HPP_
|
|
|
|
// Copyright 2020 Arthur Sonzogni. All rights reserved.
|
|
// Use of this source code is governed by the MIT license that can be found in
|
|
// the LICENSE file.
|