66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#pragma once
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#include "BufferedSocket.hxx"
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#include "IdleEvent.hxx"
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#include "util/PeakBuffer.hxx"
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#include <span>
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/**
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* A #BufferedSocket specialization that adds an output buffer.
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*/
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class FullyBufferedSocket : protected BufferedSocket {
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IdleEvent idle_event;
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PeakBuffer output;
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public:
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FullyBufferedSocket(SocketDescriptor _fd, EventLoop &_loop,
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size_t normal_size, size_t peak_size=0) noexcept
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:BufferedSocket(_fd, _loop),
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idle_event(_loop, BIND_THIS_METHOD(OnIdle)),
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output(normal_size, peak_size) {
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}
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using BufferedSocket::GetEventLoop;
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using BufferedSocket::IsDefined;
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void Close() noexcept {
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idle_event.Cancel();
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BufferedSocket::Close();
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}
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std::size_t GetOutputMaxSize() const noexcept {
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return output.max_size();
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}
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private:
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/**
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* @return the number of bytes written to the socket, 0 if the
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* socket isn't ready for writing, -1 on error (the socket has
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* been closed and probably destructed)
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*/
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ssize_t DirectWrite(std::span<const std::byte> src) noexcept;
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protected:
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/**
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* Send data from the output buffer to the socket.
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*
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* @return false if the socket has been closed
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*/
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bool Flush() noexcept;
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/**
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* @return false if the socket has been closed
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*/
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bool Write(const void *data, size_t length) noexcept;
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void OnIdle() noexcept;
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/* virtual methods from class BufferedSocket */
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void OnSocketReady(unsigned flags) noexcept override;
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};
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