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/* -*- Mode: C++; tab-width: 2; 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 */
#ifndef PageInformation_h
#define PageInformation_h
#include "mozilla/Maybe.h"
#include "mozilla/MemoryReporting.h"
#include "nsISupportsImpl.h"
#include "nsString.h"
namespace mozilla {
namespace baseprofiler {
class SpliceableJSONWriter;
} // namespace baseprofiler
} // namespace mozilla
// This class contains information that's relevant to a single page only
// while the page information is important and registered with the profiler,
// but regardless of whether the profiler is running. All accesses to it are
// protected by the profiler state lock.
// When the page gets unregistered, we keep the profiler buffer position
// to determine if we are still using this page. If not, we unregister
// it in the next page registration.
class PageInformation final {
PageInformation(uint64_t aTabID, uint64_t aInnerWindowID,
const nsCString& aUrl, uint64_t aEmbedderInnerWindowID,
bool aIsPrivateBrowsing);
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
bool Equals(PageInformation* aOtherPageInfo) const;
void StreamJSON(mozilla::baseprofiler::SpliceableJSONWriter& aWriter) const;
uint64_t InnerWindowID() const { return mInnerWindowID; }
uint64_t TabID() const { return mTabID; }
const nsCString& Url() const { return mUrl; }
uint64_t EmbedderInnerWindowID() const { return mEmbedderInnerWindowID; }
bool IsPrivateBrowsing() const { return mIsPrivateBrowsing; }
mozilla::Maybe<uint64_t> BufferPositionWhenUnregistered() const {
return mBufferPositionWhenUnregistered;
void NotifyUnregistered(uint64_t aBufferPosition) {
mBufferPositionWhenUnregistered = mozilla::Some(aBufferPosition);
const uint64_t mTabID;
const uint64_t mInnerWindowID;
const nsCString mUrl;
const uint64_t mEmbedderInnerWindowID;
const bool mIsPrivateBrowsing;
// Holds the buffer position when page is unregistered.
// It's used to determine if we still use this page in the profiler or
// not.
mozilla::Maybe<uint64_t> mBufferPositionWhenUnregistered;
virtual ~PageInformation() = default;
#endif // PageInformation_h