mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-24 05:11:16 +00:00
b5a9a91233
This does not change user-visible behavior, though the MruCache may perform slightly better than the previous hashtable implementation. Primarily this is preparation for using the same cache in conjunction with the new ICU4X-based line segmenter. Differential Revision: https://phabricator.services.mozilla.com/D225460
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/* -*- 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/. */
|
|
|
|
#include "LineBreakCache.h"
|
|
|
|
#include "nsIObserverService.h"
|
|
#include "mozilla/Services.h"
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::intl;
|
|
|
|
StaticAutoPtr<LineBreakCache> LineBreakCache::sBreakCache;
|
|
|
|
void LineBreakCache::Initialize() {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
|
|
if (obs) {
|
|
obs->AddObserver(new LineBreakCache::Observer(), "memory-pressure", false);
|
|
}
|
|
}
|
|
|
|
void LineBreakCache::Shutdown() {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
sBreakCache = nullptr;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(LineBreakCache::Observer, nsIObserver)
|
|
|
|
NS_IMETHODIMP LineBreakCache::Observer::Observe(nsISupports* aSubject,
|
|
const char* aTopic,
|
|
const char16_t* aData) {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
if (strcmp(aTopic, "memory-pressure") == 0) {
|
|
// We don't delete the cache itself, as it would almost certainly just
|
|
// get immediately re-created; just clear its contents.
|
|
if (LineBreakCache::sBreakCache) {
|
|
LineBreakCache::sBreakCache->Clear();
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|