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53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "2D.h"
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#include "nsIMemoryReporter.h"
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namespace mozilla {
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namespace gfx {
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static Atomic<size_t> gTotalNativeFontResourceData;
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NativeFontResource::NativeFontResource(size_t aDataLength)
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: mDataLength(aDataLength) {
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gTotalNativeFontResourceData += mDataLength;
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}
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NativeFontResource::~NativeFontResource() {
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gTotalNativeFontResourceData -= mDataLength;
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}
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// Memory reporter that estimates the amount of memory that is currently being
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// allocated internally by various native font APIs for native font resources.
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// The sanest way to do this, given that NativeFontResources can be created and
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// used in many different threads or processes and given that such memory is
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// implicitly allocated by the native APIs, is just to maintain a global atomic
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// counter and report this value as such.
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class NativeFontResourceDataMemoryReporter final : public nsIMemoryReporter {
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~NativeFontResourceDataMemoryReporter() = default;
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public:
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NS_DECL_ISUPPORTS
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NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
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nsISupports* aData, bool aAnonymize) override {
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MOZ_COLLECT_REPORT("explicit/gfx/native-font-resource-data", KIND_HEAP,
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UNITS_BYTES, gTotalNativeFontResourceData,
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"Total memory used by native font API resource data.");
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return NS_OK;
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}
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};
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NS_IMPL_ISUPPORTS(NativeFontResourceDataMemoryReporter, nsIMemoryReporter)
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void NativeFontResource::RegisterMemoryReporter() {
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RegisterStrongMemoryReporter(new NativeFontResourceDataMemoryReporter);
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}
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} // namespace gfx
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} // namespace mozilla
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