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/*
* Copyright 2003-2018 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_FAILING_INPUT_STREAM_HXX
#define MPD_FAILING_INPUT_STREAM_HXX
#include "InputStream.hxx"
#include <exception>
/**
* An #InputStream which always fails. This is useful for
* ProxyInputStream::SetInput() if the implementation fails to
* initialize the inner #InputStream instance.
*/
class FailingInputStream final : public InputStream {
const std::exception_ptr error;
public:
explicit FailingInputStream(const char *_uri,
const std::exception_ptr _error,
Mutex &_mutex) noexcept
:InputStream(_uri, _mutex), error(_error) {
SetReady();
}
/* virtual methods from InputStream */
void Check() override {
std::rethrow_exception(error);
}
void Seek(std::unique_lock<Mutex> &, offset_type) override {
std::rethrow_exception(error);
}
bool IsEOF() noexcept override {
return false;
}
size_t Read(std::unique_lock<Mutex> &, void *, size_t) override {
std::rethrow_exception(error);
}
};
#endif
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