/usr/include/KF5/kjs/JSLock.h is in libkf5kjs-dev 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | /*
* This file is part of the KDE libraries
* Copyright (C) 2005 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef JSLOCK_H
#define JSLOCK_H
#include "global.h"
namespace KJS
{
// to make it safe to use JavaScript on multiple threads, it is
// important to lock before doing anything that allocates a
// garbage-collected object or which may affect other shared state
// such as the protect count hash table. The simplest way to do
// this is by having a local JSLock object for the scope
// where the lock must be held. The lock is recursive so nesting
// is ok.
// Sometimes it is necessary to temporarily release the lock -
// since it is recursive you have to actually release all locks
// held by your thread. This is safe to do if you are executing
// code that doesn't require the lock, and reacquire the right
// number of locks at the end. You can do this by constructing a
// locally scoped JSLock::DropAllLocks object.
class KJS_EXPORT JSLock
{
public:
JSLock()
{
lock();
}
~JSLock()
{
unlock();
}
static void lock();
static void unlock();
static int lockCount();
class DropAllLocks
{
public:
DropAllLocks();
~DropAllLocks();
private:
int m_lockCount;
DropAllLocks(const DropAllLocks &);
DropAllLocks &operator=(const DropAllLocks &);
};
private:
JSLock(const JSLock &);
JSLock &operator=(const JSLock &);
};
#if !USE(MULTIPLE_THREADS)
inline void JSLock::lock() {}
inline void JSLock::unlock() {}
// Fix the lock count at 1 so assertions that the lock is held don't fail
inline int JSLock::lockCount()
{
return 1;
}
#endif
} // namespace
#endif // JSLOCK_H
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