зеркало из https://github.com/mozilla/gecko-dev.git
78 строки
2.6 KiB
C++
78 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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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#ifndef PageInformation_h
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#define PageInformation_h
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#include "mozilla/Atomics.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/MemoryReporting.h"
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#include <string>
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namespace mozilla {
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namespace baseprofiler {
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class SpliceableJSONWriter;
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// This class contains information that's relevant to a single page only
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// while the page information is important and registered with the profiler,
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// but regardless of whether the profiler is running. All accesses to it are
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// protected by the profiler state lock.
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// When the page gets unregistered, we keep the profiler buffer position
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// to determine if we are still using this page. If not, we unregister
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// it in the next page registration.
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class PageInformation final {
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public:
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PageInformation(uint64_t aBrowsingContextID, uint64_t aInnerWindowID,
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const std::string& aUrl, uint64_t aEmbedderInnerWindowID);
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// Using hand-rolled ref-counting, because RefCounted.h macros don't produce
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// the same code between mozglue and libxul, see bug 1536656.
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MFBT_API void AddRef() const { ++mRefCnt; }
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MFBT_API void Release() const {
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MOZ_ASSERT(int32_t(mRefCnt) > 0);
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if (--mRefCnt) {
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delete this;
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}
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}
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
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bool Equals(PageInformation* aOtherPageInfo) const;
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void StreamJSON(SpliceableJSONWriter& aWriter) const;
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uint64_t InnerWindowID() const { return mInnerWindowID; }
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uint64_t BrowsingContextID() const { return mBrowsingContextID; }
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const std::string& Url() const { return mUrl; }
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uint64_t EmbedderInnerWindowID() const { return mEmbedderInnerWindowID; }
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Maybe<uint64_t> BufferPositionWhenUnregistered() const {
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return mBufferPositionWhenUnregistered;
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}
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void NotifyUnregistered(uint64_t aBufferPosition) {
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mBufferPositionWhenUnregistered = Some(aBufferPosition);
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}
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private:
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const uint64_t mBrowsingContextID;
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const uint64_t mInnerWindowID;
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const std::string mUrl;
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const uint64_t mEmbedderInnerWindowID;
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// Holds the buffer position when page is unregistered.
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// It's used to determine if we still use this page in the profiler or
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// not.
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Maybe<uint64_t> mBufferPositionWhenUnregistered;
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mutable Atomic<int32_t, MemoryOrdering::ReleaseAcquire> mRefCnt;
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};
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} // namespace baseprofiler
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} // namespace mozilla
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#endif // PageInformation_h
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