4e0e4c00bf
SonarLint reports the latter to be better:
std::scoped_lock basically provides the same feature as std::lock_guard,
but is more generic: It can lock several mutexes at the same time, with a
deadlock prevention mechanism (see {rule:cpp:S5524}). The equivalent code
to perform simultaneous locking with std::lock_guard is significantly more
complex. Therefore, it is simpler to use std::scoped_lock all the time,
even when locking only one mutex (there will be no performance impact).
Signed-off-by: Rosen Penev <rosenp@gmail.com>
98 lines
2.1 KiB
C++
98 lines
2.1 KiB
C++
/*
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* Copyright 2003-2021 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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#include "config.h"
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#include "event/Thread.hxx"
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#include "input/Init.hxx"
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#include "input/InputStream.hxx"
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#include "input/TextInputStream.hxx"
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#include "config/Data.hxx"
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#include "util/PrintException.hxx"
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#ifdef ENABLE_ARCHIVE
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#include "archive/ArchiveList.hxx"
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#endif
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#include <stdexcept>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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class GlobalInit {
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EventThread io_thread;
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#ifdef ENABLE_ARCHIVE
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const ScopeArchivePluginsInit archive_plugins_init;
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#endif
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const ScopeInputPluginsInit input_plugins_init;
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public:
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GlobalInit()
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:input_plugins_init(ConfigData(), io_thread.GetEventLoop())
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{
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io_thread.Start();
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}
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};
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static void
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dump_text_file(TextInputStream &is)
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{
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const char *line;
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while ((line = is.ReadLine()) != nullptr)
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printf("'%s'\n", line);
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}
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static int
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dump_input_stream(InputStreamPtr &&is)
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{
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{
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TextInputStream tis(std::move(is));
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dump_text_file(tis);
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}
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const std::scoped_lock<Mutex> protect(is->mutex);
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is->Check();
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return 0;
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}
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int main(int argc, char **argv)
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try {
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if (argc != 2) {
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fprintf(stderr, "Usage: run_input URI\n");
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return EXIT_FAILURE;
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}
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/* initialize MPD */
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const GlobalInit init;
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/* open the stream and dump it */
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Mutex mutex;
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auto is = InputStream::OpenReady(argv[1], mutex);
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return dump_input_stream(std::move(is));
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} catch (...) {
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PrintException(std::current_exception());
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return EXIT_FAILURE;
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}
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