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/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_FULLY_BUFFERED_SOCKET_HXX
#define MPD_FULLY_BUFFERED_SOCKET_HXX
#include "BufferedSocket.hxx"
#include "IdleMonitor.hxx"
#include "util/PeakBuffer.hxx"
/**
* A #BufferedSocket specialization that adds an output buffer.
*/
class FullyBufferedSocket : protected BufferedSocket, private IdleMonitor {
PeakBuffer output;
public:
FullyBufferedSocket(SocketDescriptor _fd, EventLoop &_loop,
size_t normal_size, size_t peak_size=0) noexcept
:BufferedSocket(_fd, _loop), IdleMonitor(_loop),
output(normal_size, peak_size) {
}
using BufferedSocket::GetEventLoop;
using BufferedSocket::IsDefined;
void Close() noexcept {
IdleMonitor::Cancel();
BufferedSocket::Close();
}
std::size_t GetOutputMaxSize() const noexcept {
return output.max_size();
}
private:
/**
* @return the number of bytes written to the socket, 0 if the
* socket isn't ready for writing, -1 on error (the socket has
* been closed and probably destructed)
*/
ssize_t DirectWrite(const void *data, size_t length) noexcept;
protected:
/**
* Send data from the output buffer to the socket.
*
* @return false if the socket has been closed
*/
bool Flush() noexcept;
/**
* @return false if the socket has been closed
*/
bool Write(const void *data, size_t length) noexcept;
/* virtual methods from class SocketMonitor */
bool OnSocketReady(unsigned flags) noexcept override;
void OnIdle() noexcept override;
};
#endif
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