JSLock.cpp [kdelibs/kjs/JSLock.cpp]

1	// -- mode: c++; c-basic-offset: 4 --
2	/*
3	* This file is part of the KDE libraries
4	* Copyright (C) 2005 Apple Computer, Inc.
5	*
6	* This library is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU Library General Public
8	* License as published by the Free Software Foundation; either
9	* version 2 of the License, or (at your option) any later version.
10	*
11	* This library is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14	* Library General Public License for more details.
15	*
16	* You should have received a copy of the GNU Library General Public License
17	* along with this library; see the file COPYING.LIB. If not, write to
18	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19	* Boston, MA 02110-1301, USA
20	*
21	*/
22
23	#include "JSLock.h"
24	#include <config-kjs.h>
25
26	#include "collector.h"
27
28	namespace KJS {
29
30	#if USE(MULTIPLE_THREADS)
31
32	static pthread_once_t interpreterLockOnce = PTHREAD_ONCE_INIT;
33	static pthread_mutex_t interpreterLock;
34	static int interpreterLockCount = `0`;
35
36	static void initializeJSLock()
37	{
38	pthread_mutexattr_t attr;
39
40	pthread_mutexattr_init(&attr);
41	pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
42
43	pthread_mutex_init(&interpreterLock, &attr);
44	}
45
46	void JSLock::lock()
47	{
48	pthread_once(&interpreterLockOnce, initializeJSLock);
49	pthread_mutex_lock(&interpreterLock);
50	interpreterLockCount++;
51	Collector::registerThread();
52	}
53
54	void JSLock::unlock()
55	{
56	interpreterLockCount--;
57	pthread_mutex_unlock(&interpreterLock);
58	}
59
60	int JSLock::lockCount()
61	{
62	return interpreterLockCount;
63	}
64
65	#endif
66
67	JSLock::DropAllLocks::DropAllLocks()
68	{
69	int lockCount = JSLock::lockCount();
70	for (int i = `0`; i < lockCount; i++) {
71	JSLock::unlock();
72	}
73	m_lockCount = lockCount;
74	}
75
76	JSLock::DropAllLocks::~DropAllLocks()
77	{
78	int lockCount = m_lockCount;
79	for (int i = `0`; i < lockCount; i++) {
80	JSLock::lock();
81	}
82	}
83
84	}
85