The Tor Browser: dom/camera/AutoRwLock.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef RWLOCK_AUTO_ENTER_H

     6 #define RWLOCK_AUTO_ENTER_H

     8 #include "prrwlock.h"

     9 #include "mozilla/Assertions.h"

    11 class RwLockAutoEnterRead

    12 {

    13 public:

    14   RwLockAutoEnterRead(PRRWLock* aRwLock)

    15     : mRwLock(aRwLock)

    16   {

    17     MOZ_ASSERT(mRwLock);

    18     PR_RWLock_Rlock(mRwLock);

    19   }

    21   ~RwLockAutoEnterRead()

    22   {

    23     PR_RWLock_Unlock(mRwLock);

    24   }

    26 protected:

    27   PRRWLock* mRwLock;

    28 };

    30 class RwLockAutoEnterWrite

    31 {

    32 public:

    33   RwLockAutoEnterWrite(PRRWLock* aRwLock)

    34     : mRwLock(aRwLock)

    35   {

    36     MOZ_ASSERT(mRwLock);

    37     PR_RWLock_Wlock(mRwLock);

    38   }

    40   ~RwLockAutoEnterWrite()

    41   {

    42     PR_RWLock_Unlock(mRwLock);

    43   }

    45 protected:

    46   PRRWLock* mRwLock;

    47 };

    49 #endif // RWLOCK_AUTO_ENTER_H

The Tor Browser / file revision

dom/camera/AutoRwLock.h@97036ab72558

dom/camera/AutoRwLock.h