The Tor Browser: xpcom/build/IOInterposerPrivate.h@b8a032363ba2 (annotated)

xpcom/build/IOInterposerPrivate.h@b8a032363ba2 (annotated)

xpcom/build/IOInterposerPrivate.h

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef xpcom_build_IOInterposerPrivate_h
 #define xpcom_build_IOInterposerPrivate_h
 /* This header file contains declarations for helper classes that are
    to be used exclusively by IOInterposer and its observers. This header
    file is not to be used by anything else and MUST NOT be exported! */
 #include <prcvar.h>
 #include <prlock.h>
 namespace mozilla {
 namespace IOInterposer {
 /**
  * The following classes are simple wrappers for PRLock and PRCondVar.
  * IOInterposer and friends use these instead of Mozilla::Mutex et al because
  * of the fact that IOInterposer is permitted to run until the process
  * terminates; we can't use anything that plugs into leak checkers or deadlock
  * detectors because IOInterposer will outlive those and generate false
  * positives.
  */
 class Monitor
 {
 public:
   Monitor()
     : mLock(PR_NewLock())
     , mCondVar(PR_NewCondVar(mLock))
   {
   }
   ~Monitor()
   {
     PR_DestroyCondVar(mCondVar);
     mCondVar = nullptr;
     PR_DestroyLock(mLock);
     mLock = nullptr;
   }
   void Lock()
   {
     PR_Lock(mLock);
   }
   void Unlock()
   {
     PR_Unlock(mLock);
   }
   bool Wait(PRIntervalTime aTimeout = PR_INTERVAL_NO_TIMEOUT)
   {
     return PR_WaitCondVar(mCondVar, aTimeout) == PR_SUCCESS;
   }
   bool Notify()
   {
     return PR_NotifyCondVar(mCondVar) == PR_SUCCESS;
   }
 private:
   PRLock*    mLock;
   PRCondVar* mCondVar;
 };
 class MonitorAutoLock
 {
 public:
   MonitorAutoLock(Monitor &aMonitor)
     : mMonitor(aMonitor)
   {
     mMonitor.Lock();
   }
   ~MonitorAutoLock()
   {
     mMonitor.Unlock();
   }
   bool Wait(PRIntervalTime aTimeout = PR_INTERVAL_NO_TIMEOUT)
   {
     return mMonitor.Wait(aTimeout);
   }
   bool Notify()
   {
     return mMonitor.Notify();
   }
 private:
   Monitor&  mMonitor;
 };
 class MonitorAutoUnlock
 {
 public:
   MonitorAutoUnlock(Monitor &aMonitor)
     : mMonitor(aMonitor)
   {
     mMonitor.Unlock();
   }
   ~MonitorAutoUnlock()
   {
     mMonitor.Lock();
   }
 private:
   Monitor&  mMonitor;
 };
 class Mutex
 {
 public:
   Mutex()
     : mPRLock(PR_NewLock())
   {
   }
   ~Mutex()
   {
     PR_DestroyLock(mPRLock);
     mPRLock = nullptr;
   }
   void Lock()
   {
     PR_Lock(mPRLock);
   }
   void Unlock()
   {
     PR_Unlock(mPRLock);
   }
 private:
   PRLock*   mPRLock;
 };
 class AutoLock
 {
 public:
   AutoLock(Mutex& aLock)
     : mLock(aLock)
   {
     mLock.Lock();
   }
   ~AutoLock()
   {
     mLock.Unlock();
   }
 private:
   Mutex&     mLock;
 };
 } // namespace IOInterposer
 } // namespace mozilla
 #endif // xpcom_build_IOInterposerPrivate_h

The Tor Browser / annotate

xpcom/build/IOInterposerPrivate.h@b8a032363ba2 (annotated)

xpcom/build/IOInterposerPrivate.h