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Source at commit 1322 created 9 years 5 months ago.
By meklort, Add doxygen to utils folder
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Nokia Corporation (qt-info@nokia.com)
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** No Commercial Usage
10** This file contains pre-release code and may not be distributed.
11** You may use this file in accordance with the terms and conditions
12** contained in the either Technology Preview License Agreement or the
13** Beta Release License Agreement.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
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36** If you are unsure which license is appropriate for your use, please
37** contact the sales department at http://www.qtsoftware.com/contact.
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40****************************************************************************/
41
42#include "qglobal.h"
43
44#if defined(_OS_HPUX_)
45#include <sys/pstat.h>
46#elif defined(_OS_MAC_)
47#undef DEBUG
48#include <CoreServices/CoreServices.h>
49#elif defined(_OS_BSDI_)
50#include <mach/mach_types.h>
51#include <sys/systm.h>
52#include <sys/types.h>
53#include <sys/sysctl.h>
54#endif
55#include <unistd.h>
56
57#include "qthread.h"
58#include "qthread_p.h"
59
60
61/**************************************************************************
62 ** QThreadPrivate
63 *************************************************************************/
64
65QThreadPrivate::QThreadPrivate() :
66 running(FALSE), finished(FALSE), terminated(FALSE), stackSize(0)
67{
68 thread_id = 0;
69}
70
71QThreadPrivate::~QThreadPrivate()
72{
73}
74
75void *QThreadPrivate::start(void *arg)
76{
77 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
78 pthread_cleanup_push(QThreadPrivate::finish, arg);
79
80 QThread *thr = reinterpret_cast<QThread *>(arg);
81
82 thr->started();
83 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
84 pthread_testcancel();
85 thr->run();
86
87 pthread_cleanup_pop(1);
88 return 0;
89}
90
91void QThreadPrivate::finish(void *arg)
92{
93 QThread *thr = reinterpret_cast<QThread *>(arg);
94 QThreadPrivate *d = thr->d;
95 QMutexLocker locker(&d->mutex);
96
97 d->running = FALSE;
98 d->finished = TRUE;
99 if (d->terminated)
100 thr->terminated();
101 d->terminated = FALSE;
102 thr->finished();
103
104 d->thread_id = 0;
105 d->thread_done.wakeAll();
106}
107
108
109
110
111/**************************************************************************
112 ** QThread
113 *************************************************************************/
114
115void QThread::start()
116{
117 QMutexLocker locker(&d->mutex);
118 if (d->running) return;
119
120 d->running = TRUE;
121 d->finished = FALSE;
122
123 pthread_attr_t attr;
124 pthread_attr_init(&attr);
125 pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED);
126 pthread_attr_setinheritsched(&attr, PTHREAD_INHERIT_SCHED);
127 if (d->stackSize>0)
128 {
129#if defined(_POSIX_THREAD_ATTR_STACKSIZE) && (_POSIX_THREAD_ATTR_STACKSIZE-0>0)
130 pthread_attr_setstacksize(&attr,d->stackSize);
131#endif
132 }
133 int code = pthread_create(&d->thread_id, &attr, QThreadPrivate::start, this);
134 pthread_attr_destroy(&attr);
135
136 if (code)
137 {
138 qWarning("QThread::start: Thread creation error: %d", code);
139
140 d->running = FALSE;
141 d->finished = FALSE;
142 d->thread_id = 0;
143 }
144}
145
146void QThread::terminate()
147{
148 QMutexLocker locker(&d->mutex);
149
150 if (!d->thread_id) return;
151
152 int code = pthread_cancel(d->thread_id);
153 if (code)
154 {
155 qWarning("QThread::start: Thread termination error: %d", code);
156 }
157 else
158 {
159 d->terminated = TRUE;
160 }
161}
162
163void QThread::wait()
164{
165 QMutexLocker locker(&d->mutex);
166 if (d->finished || !d->running) return;
167
168 while (d->running)
169 {
170 d->thread_done.wait(locker.mutex());
171 }
172}
173
174#if defined(QT_LINUXBASE) && !defined(_SC_NPROCESSORS_ONLN)
175// LSB doesn't define _SC_NPROCESSORS_ONLN.
176# define _SC_NPROCESSORS_ONLN 84
177#endif
178
179int QThread::idealThreadCount()
180{
181 int cores = -1;
182#if defined(_OS_MAC_)
183 // Mac OS X
184 cores = MPProcessorsScheduled();
185#elif defined(_OS_HPUX_)
186 // HP-UX
187 struct pst_dynamic psd;
188 if (pstat_getdynamic(&psd, sizeof(psd), 1, 0) == -1)
189 {
190 perror("pstat_getdynamic");
191 cores = -1;
192 }
193 else
194 {
195 cores = (int)psd.psd_proc_cnt;
196 }
197#elif defined(_OS_BSDI_)
198 // FreeBSD, OpenBSD, NetBSD, BSD/OS
199 size_t len = sizeof(cores);
200 int mib[2];
201 mib[0] = CTL_HW;
202 mib[1] = HW_NCPU;
203
204 if (sysctl(mib, 2, &cores, &len, NULL, 0) != 0)
205 {
206 perror("sysctl");
207 cores = -1;
208 }
209#elif defined(_OS_IRIX_)
210 // IRIX
211 cores = (int)sysconf(_SC_NPROC_ONLN);
212#else
213 // the rest: Linux, Solaris, AIX, Tru64
214 cores = (int)sysconf(_SC_NPROCESSORS_ONLN);
215#endif
216 return cores;
217}
218
219

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