788e3b31e1
The "pure" and "const" attributes are not so well-defined, and a recent clang version implements an optimization which pushes the definition's boundary beyond what I believed it was. clang now assumes that functions declared "pure" cannot throw exceptions, even if they lack the "noexcept" specification. When compiled with this new clang version, MPD will crash randomly if an exception happens to get thrown by such as "pure" function (https://github.com/MusicPlayerDaemon/MPD/issues/41). This commit removes all such misplaced "pure" and "const" attributes, closing #41.
98 lines
2.1 KiB
C++
98 lines
2.1 KiB
C++
/*
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* Copyright 2003-2017 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_OUTPUT_WRAPPER_HXX
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#define MPD_OUTPUT_WRAPPER_HXX
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#include "util/Cast.hxx"
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#include <chrono>
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struct ConfigBlock;
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template<class T>
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struct AudioOutputWrapper {
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static T &Cast(AudioOutput &ao) {
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return ContainerCast(ao, &T::base);
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}
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static AudioOutput *Init(const ConfigBlock &block) {
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T *t = T::Create(block);
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return &t->base;
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}
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static void Finish(AudioOutput *ao) {
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T *t = &Cast(*ao);
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delete t;
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}
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static void Enable(AudioOutput *ao) {
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T &t = Cast(*ao);
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t.Enable();
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}
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static void Disable(AudioOutput *ao) {
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T &t = Cast(*ao);
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t.Disable();
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}
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static void Open(AudioOutput *ao, AudioFormat &audio_format) {
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T &t = Cast(*ao);
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t.Open(audio_format);
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}
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static void Close(AudioOutput *ao) {
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T &t = Cast(*ao);
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t.Close();
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}
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gcc_pure
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static std::chrono::steady_clock::duration Delay(AudioOutput *ao) noexcept {
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T &t = Cast(*ao);
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return t.Delay();
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}
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static void SendTag(AudioOutput *ao, const Tag &tag) {
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T &t = Cast(*ao);
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t.SendTag(tag);
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}
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static size_t Play(AudioOutput *ao, const void *chunk, size_t size) {
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T &t = Cast(*ao);
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return t.Play(chunk, size);
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}
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static void Drain(AudioOutput *ao) {
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T &t = Cast(*ao);
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t.Drain();
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}
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static void Cancel(AudioOutput *ao) {
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T &t = Cast(*ao);
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t.Cancel();
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}
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static bool Pause(AudioOutput *ao) {
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T &t = Cast(*ao);
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return t.Pause();
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}
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};
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#endif
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