73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
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/*
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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_THREAD_UTIL_HXX
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#define MPD_THREAD_UTIL_HXX
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#ifdef __linux__
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#include <sched.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#elif defined(WIN32)
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#include <windows.h>
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#endif
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#ifdef __linux__
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static int
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ioprio_set(int which, int who, int ioprio)
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{
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return syscall(SYS_ioprio_set, which, who, ioprio);
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}
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static void
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ioprio_set_idle()
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{
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static constexpr int _IOPRIO_WHO_PROCESS = 1;
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static constexpr int _IOPRIO_CLASS_IDLE = 3;
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static constexpr int _IOPRIO_CLASS_SHIFT = 13;
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static constexpr int _IOPRIO_IDLE =
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(_IOPRIO_CLASS_IDLE << _IOPRIO_CLASS_SHIFT) | 7;
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ioprio_set(_IOPRIO_WHO_PROCESS, 0, _IOPRIO_IDLE);
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}
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#endif
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/**
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* Lower the current thread's priority to "idle" (very low).
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*/
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static inline void
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SetThreadIdlePriority()
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{
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#ifdef __linux__
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#ifdef SCHED_IDLE
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static struct sched_param sched_param;
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sched_setscheduler(0, SCHED_IDLE, &sched_param);
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#endif
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ioprio_set_idle();
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#elif defined(WIN32)
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SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_IDLE);
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#endif
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};
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#endif
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