accessible/base/nsAccCache.h
author Sebastian Kaspari <s.kaspari@gmail.com>
Tue, 10 Nov 2015 14:33:07 +0100
changeset 304197 5893c5df7b847c9060bb8e1e8573d533ad84f214
parent 301570 e8c7dfe727cd970e2c3294934e2927b14143c205
child 308980 a7ba739d20a99e0808eed568175aa9404f2b4929
permissions -rw-r--r--
Bug 1222925 - Escape hatch improvement: Detect ABI mismatches (ARM vs. x86). r=rnewman a=ritu

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 _nsAccCache_H_
#define _nsAccCache_H_

#include "xpcAccessibleDocument.h"

////////////////////////////////////////////////////////////////////////////////
// Accessible cache utils
////////////////////////////////////////////////////////////////////////////////

/**
 * Shutdown and removes the accessible from cache.
 */
template <class T>
static PLDHashOperator
ClearCacheEntry(const void* aKey, RefPtr<T>& aAccessible, void* aUserArg)
{
  NS_ASSERTION(aAccessible, "Calling ClearCacheEntry with a nullptr pointer!");
  if (aAccessible && !aAccessible->IsDefunct())
    aAccessible->Shutdown();

  return PL_DHASH_REMOVE;
}

template <class T>
static PLDHashOperator
UnbindCacheEntryFromDocument(const void* aKey, RefPtr<T>& aAccessible,
                             void* aUserArg)
{
  MOZ_ASSERT(aAccessible && !aAccessible->IsDefunct());
  aAccessible->Document()->UnbindFromDocument(aAccessible);

  return PL_DHASH_REMOVE;
}

/**
 * Clear the cache and shutdown the accessibles.
 */

template <class T>
static void
ClearCache(nsRefPtrHashtable<nsPtrHashKey<const void>, T>& aCache)
{
  aCache.Enumerate(ClearCacheEntry<T>, nullptr);
}

#endif