65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine 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 3 of the License, or
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(at your option) any later version.
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Clementine 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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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "backgroundthread.h"
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BackgroundThreadBase::BackgroundThreadBase(QObject *parent)
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: QThread(parent),
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io_priority_(IOPRIO_CLASS_NONE),
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cpu_priority_(InheritPriority)
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{
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}
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int BackgroundThreadBase::SetIOPriority() {
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#ifdef Q_OS_LINUX
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return syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, gettid(),
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4 | io_priority_ << IOPRIO_CLASS_SHIFT);
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#elif defined(Q_OS_DARWIN)
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return setpriority(PRIO_DARWIN_THREAD, 0,
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io_priority_ == IOPRIO_CLASS_IDLE ? PRIO_DARWIN_BG : 0);
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#else
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return 0;
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#endif
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}
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int BackgroundThreadBase::gettid() {
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#ifdef Q_OS_LINUX
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return syscall(SYS_gettid);
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#else
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return 0;
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#endif
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}
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void BackgroundThreadBase::Start(bool block) {
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if (!block) {
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// Just start the thread and return immediately
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start(cpu_priority_);
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return;
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}
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// Lock the mutex so the new thread won't try to wake us up before we start
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// waiting.
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QMutexLocker l(&started_wait_condition_mutex_);
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// Start the thread.
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start(cpu_priority_);
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// Wait for the thread to initalise.
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started_wait_condition_.wait(l.mutex());
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}
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