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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 http://mozilla.org/MPL/2.0/. */
#include "ScopedLogExtraInfo.h"
namespace mozilla::dom::quota {
#ifdef QM_SCOPED_LOG_EXTRA_INFO_ENABLED
MOZ_THREAD_LOCAL(const nsACString*) ScopedLogExtraInfo::sQueryValue;
MOZ_THREAD_LOCAL(const nsACString*) ScopedLogExtraInfo::sContextValue;
/* static */
auto ScopedLogExtraInfo::FindSlot(const char* aTag) {
// XXX For now, don't use a real map but just allow the known tag values.
if (aTag == kTagQuery) {
return &sQueryValue;
}
if (aTag == kTagContext) {
return &sContextValue;
}
MOZ_CRASH("Unknown tag!");
}
ScopedLogExtraInfo::~ScopedLogExtraInfo() {
if (mTag) {
MOZ_ASSERT(&mCurrentValue == FindSlot(mTag)->get(),
"Bad scoping of ScopedLogExtraInfo, must not be interleaved!");
FindSlot(mTag)->set(mPreviousValue);
}
}
ScopedLogExtraInfo::ScopedLogExtraInfo(ScopedLogExtraInfo&& aOther) noexcept
: mTag(aOther.mTag),
mPreviousValue(aOther.mPreviousValue),
mCurrentValue(std::move(aOther.mCurrentValue)) {
aOther.mTag = nullptr;
FindSlot(mTag)->set(&mCurrentValue);
}
/* static */ ScopedLogExtraInfo::ScopedLogExtraInfoMap
ScopedLogExtraInfo::GetExtraInfoMap() {
// This could be done in a cheaper way, but this is never called on a hot
// path, so we anticipate using a real map inside here to make use simpler for
// the caller(s).
ScopedLogExtraInfoMap map;
if (sQueryValue.get()) {
map.emplace(kTagQuery, sQueryValue.get());
}
if (sContextValue.get()) {
map.emplace(kTagContext, sContextValue.get());
}
return map;
}
/* static */ void ScopedLogExtraInfo::Initialize() {
MOZ_ALWAYS_TRUE(sQueryValue.init());
MOZ_ALWAYS_TRUE(sContextValue.init());
}
void ScopedLogExtraInfo::AddInfo() {
auto* slot = FindSlot(mTag);
MOZ_ASSERT(slot);
mPreviousValue = slot->get();
slot->set(&mCurrentValue);
}
#endif
} // namespace mozilla::dom::quota
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