mirror of
https://github.com/mii443/libdatachannel.git
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86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/**
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* Copyright (c) 2019 Paul-Louis Ageneau
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef RTC_CHANNEL_H
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#define RTC_CHANNEL_H
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#include "include.hpp"
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#include "message.hpp"
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#include <atomic>
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#include <functional>
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#include <variant>
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namespace rtc {
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class RTC_CPP_EXPORT Channel {
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public:
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Channel() = default;
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virtual ~Channel() = default;
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virtual void close() = 0;
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virtual bool send(message_variant data) = 0; // returns false if buffered
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virtual bool send(const byte *data, size_t size) = 0;
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virtual bool isOpen() const = 0;
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virtual bool isClosed() const = 0;
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virtual size_t maxMessageSize() const; // max message size in a call to send
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virtual size_t bufferedAmount() const; // total size buffered to send
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void onOpen(std::function<void()> callback);
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void onClosed(std::function<void()> callback);
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void onError(std::function<void(string error)> callback);
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void onMessage(std::function<void(message_variant data)> callback);
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void onMessage(std::function<void(binary data)> binaryCallback,
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std::function<void(string data)> stringCallback);
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void onBufferedAmountLow(std::function<void()> callback);
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void setBufferedAmountLowThreshold(size_t amount);
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// Extended API
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virtual std::optional<message_variant> receive() = 0; // only if onMessage unset
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virtual std::optional<message_variant> peek() = 0; // only if onMessage unset
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virtual size_t availableAmount() const; // total size available to receive
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void onAvailable(std::function<void()> callback);
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protected:
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virtual void triggerOpen();
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virtual void triggerClosed();
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virtual void triggerError(string error);
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virtual void triggerAvailable(size_t count);
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virtual void triggerBufferedAmount(size_t amount);
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void resetCallbacks();
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private:
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synchronized_callback<> mOpenCallback;
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synchronized_callback<> mClosedCallback;
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synchronized_callback<string> mErrorCallback;
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synchronized_callback<message_variant> mMessageCallback;
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synchronized_callback<> mAvailableCallback;
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synchronized_callback<> mBufferedAmountLowCallback;
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std::atomic<size_t> mBufferedAmount = 0;
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std::atomic<size_t> mBufferedAmountLowThreshold = 0;
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};
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} // namespace rtc
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#endif // RTC_CHANNEL_H
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