/usr/include/firefox/mozilla/Mutex.h is in firefox-dev 11.0+build1-0ubuntu4.
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 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: sw=4 ts=4 et :
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef mozilla_Mutex_h
#define mozilla_Mutex_h
#include "prlock.h"
#include "mozilla/BlockingResourceBase.h"
#include "mozilla/GuardObjects.h"
//
// Provides:
//
// - Mutex, a non-recursive mutex
// - MutexAutoLock, an RAII class for ensuring that Mutexes are properly
// locked and unlocked
// - MutexAutoUnlock, complementary sibling to MutexAutoLock
//
// Using MutexAutoLock/MutexAutoUnlock is MUCH preferred to making bare
// calls to Mutex.Lock and Unlock.
//
namespace mozilla {
/**
* Mutex
* When possible, use MutexAutoLock/MutexAutoUnlock to lock/unlock this
* mutex within a scope, instead of calling Lock/Unlock directly.
**/
class NS_COM_GLUE Mutex : BlockingResourceBase
{
public:
/**
* Mutex
* @param name A name which can reference this lock
* @returns If failure, nsnull
* If success, a valid Mutex* which must be destroyed
* by Mutex::DestroyMutex()
**/
Mutex(const char* name) :
BlockingResourceBase(name, eMutex)
{
MOZ_COUNT_CTOR(Mutex);
mLock = PR_NewLock();
if (!mLock)
NS_RUNTIMEABORT("Can't allocate mozilla::Mutex");
}
/**
* ~Mutex
**/
~Mutex()
{
NS_ASSERTION(mLock,
"improperly constructed Lock or double free");
// NSPR does consistency checks for us
PR_DestroyLock(mLock);
mLock = 0;
MOZ_COUNT_DTOR(Mutex);
}
#ifndef DEBUG
/**
* Lock
* @see prlock.h
**/
void Lock()
{
PR_Lock(mLock);
}
/**
* Unlock
* @see prlock.h
**/
void Unlock()
{
PR_Unlock(mLock);
}
/**
* AssertCurrentThreadOwns
* @see prlock.h
**/
void AssertCurrentThreadOwns () const
{
}
/**
* AssertNotCurrentThreadOwns
* @see prlock.h
**/
void AssertNotCurrentThreadOwns () const
{
}
#else
void Lock();
void Unlock();
void AssertCurrentThreadOwns () const
{
PR_ASSERT_CURRENT_THREAD_OWNS_LOCK(mLock);
}
void AssertNotCurrentThreadOwns () const
{
// FIXME bug 476536
}
#endif // ifndef DEBUG
private:
Mutex();
Mutex(const Mutex&);
Mutex& operator=(const Mutex&);
PRLock* mLock;
friend class CondVar;
};
/**
* MutexAutoLock
* Acquires the Mutex when it enters scope, and releases it when it leaves
* scope.
*
* MUCH PREFERRED to bare calls to Mutex.Lock and Unlock.
*/
class NS_COM_GLUE NS_STACK_CLASS MutexAutoLock
{
public:
/**
* Constructor
* The constructor aquires the given lock. The destructor
* releases the lock.
*
* @param aLock A valid mozilla::Mutex* returned by
* mozilla::Mutex::NewMutex.
**/
MutexAutoLock(mozilla::Mutex& aLock MOZILLA_GUARD_OBJECT_NOTIFIER_PARAM) :
mLock(&aLock)
{
MOZILLA_GUARD_OBJECT_NOTIFIER_INIT;
NS_ASSERTION(mLock, "null mutex");
mLock->Lock();
}
~MutexAutoLock(void) {
mLock->Unlock();
}
private:
MutexAutoLock();
MutexAutoLock(MutexAutoLock&);
MutexAutoLock& operator=(MutexAutoLock&);
static void* operator new(size_t) CPP_THROW_NEW;
static void operator delete(void*);
mozilla::Mutex* mLock;
MOZILLA_DECL_USE_GUARD_OBJECT_NOTIFIER
};
/**
* MutexAutoUnlock
* Releases the Mutex when it enters scope, and re-acquires it when it leaves
* scope.
*
* MUCH PREFERRED to bare calls to Mutex.Unlock and Lock.
*/
class NS_COM_GLUE NS_STACK_CLASS MutexAutoUnlock
{
public:
MutexAutoUnlock(mozilla::Mutex& aLock MOZILLA_GUARD_OBJECT_NOTIFIER_PARAM) :
mLock(&aLock)
{
MOZILLA_GUARD_OBJECT_NOTIFIER_INIT;
NS_ASSERTION(mLock, "null lock");
mLock->Unlock();
}
~MutexAutoUnlock()
{
mLock->Lock();
}
private:
MutexAutoUnlock();
MutexAutoUnlock(MutexAutoUnlock&);
MutexAutoUnlock& operator =(MutexAutoUnlock&);
static void* operator new(size_t) CPP_THROW_NEW;
static void operator delete(void*);
mozilla::Mutex* mLock;
MOZILLA_DECL_USE_GUARD_OBJECT_NOTIFIER
};
} // namespace mozilla
#endif // ifndef mozilla_Mutex_h
|