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/* -*- 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 */
#include "2D.h"
#include "nsIMemoryReporter.h"
namespace mozilla {
namespace gfx {
static Atomic<size_t> gTotalNativeFontResourceData;
NativeFontResource::NativeFontResource(size_t aDataLength)
: mDataLength(aDataLength) {
gTotalNativeFontResourceData += mDataLength;
NativeFontResource::~NativeFontResource() {
gTotalNativeFontResourceData -= mDataLength;
// Memory reporter that estimates the amount of memory that is currently being
// allocated internally by various native font APIs for native font resources.
// The sanest way to do this, given that NativeFontResources can be created and
// used in many different threads or processes and given that such memory is
// implicitly allocated by the native APIs, is just to maintain a global atomic
// counter and report this value as such.
class NativeFontResourceDataMemoryReporter final : public nsIMemoryReporter {
~NativeFontResourceDataMemoryReporter() = default;
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override {
MOZ_COLLECT_REPORT("explicit/gfx/native-font-resource-data", KIND_HEAP,
UNITS_BYTES, gTotalNativeFontResourceData,
"Total memory used by native font API resource data.");
return NS_OK;
NS_IMPL_ISUPPORTS(NativeFontResourceDataMemoryReporter, nsIMemoryReporter)
void NativeFontResource::RegisterMemoryReporter() {
RegisterStrongMemoryReporter(new NativeFontResourceDataMemoryReporter);
} // namespace gfx
} // namespace mozilla