102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_NFS_FILE_READER_HXX
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#define MPD_NFS_FILE_READER_HXX
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#include "check.h"
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#include "Lease.hxx"
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#include "Callback.hxx"
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#include "event/DeferredMonitor.hxx"
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#include "Compiler.h"
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#include <string>
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#include <stdint.h>
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#include <stddef.h>
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#include <sys/stat.h>
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struct nfsfh;
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class NfsConnection;
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class NfsFileReader : NfsLease, NfsCallback, DeferredMonitor {
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enum class State {
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INITIAL,
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DEFER,
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MOUNT,
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OPEN,
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STAT,
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READ,
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IDLE,
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};
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State state;
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std::string server, export_name;
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const char *path;
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NfsConnection *connection;
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nfsfh *fh;
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public:
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NfsFileReader();
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~NfsFileReader();
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void Close();
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void DeferClose();
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bool Open(const char *uri, Error &error);
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bool Read(uint64_t offset, size_t size, Error &error);
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void CancelRead();
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bool IsIdle() const {
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return state == State::IDLE;
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}
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protected:
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virtual void OnNfsFileOpen(uint64_t size) = 0;
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virtual void OnNfsFileRead(const void *data, size_t size) = 0;
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virtual void OnNfsFileError(Error &&error) = 0;
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private:
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/**
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* Cancel the current operation, if any. The NfsLease must be
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* unregistered already.
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*/
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void CancelOrClose();
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void OpenCallback(nfsfh *_fh);
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void StatCallback(const struct stat *st);
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/* virtual methods from NfsLease */
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void OnNfsConnectionReady() final;
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void OnNfsConnectionFailed(const Error &error) final;
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void OnNfsConnectionDisconnected(const Error &error) final;
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/* virtual methods from NfsCallback */
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void OnNfsCallback(unsigned status, void *data) final;
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void OnNfsError(Error &&error) final;
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/* virtual methods from DeferredMonitor */
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void RunDeferred() final;
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};
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#endif
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