forked from mirrors/gecko-dev
b4b30f1acd
When the code was originally added in bug 1842658, it was to use non-atomic
refcounting across multiple threads due to some invariants preventing
concurrent access. That was changed in bug 1607762 to fix a race issue.
We should be able to switch to using the macros now, which will simplify the
code here a bit.
Depends on D183203
Differential Revision: https://phabricator.services.mozilla.com/D183204
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/* 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 "nsHtml5OwningUTF16Buffer.h"
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#include "mozilla/Span.h"
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using namespace mozilla;
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nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(char16_t* aBuffer)
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: nsHtml5UTF16Buffer(aBuffer, 0), next(nullptr), key(nullptr) {}
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nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(void* aKey)
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: nsHtml5UTF16Buffer(nullptr, 0), next(nullptr), key(aKey) {}
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nsHtml5OwningUTF16Buffer::~nsHtml5OwningUTF16Buffer() {
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DeleteBuffer();
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// This is to avoid dtor recursion on 'next', bug 706932.
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RefPtr<nsHtml5OwningUTF16Buffer> tail;
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tail.swap(next);
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while (tail && tail->mRefCnt == 1) {
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RefPtr<nsHtml5OwningUTF16Buffer> tmp;
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tmp.swap(tail->next);
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tail.swap(tmp);
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}
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}
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// static
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already_AddRefed<nsHtml5OwningUTF16Buffer>
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nsHtml5OwningUTF16Buffer::FalliblyCreate(int32_t aLength) {
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char16_t* newBuf = new (mozilla::fallible) char16_t[aLength];
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if (!newBuf) {
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return nullptr;
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}
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RefPtr<nsHtml5OwningUTF16Buffer> newObj =
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new (mozilla::fallible) nsHtml5OwningUTF16Buffer(newBuf);
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if (!newObj) {
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delete[] newBuf;
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return nullptr;
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}
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return newObj.forget();
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}
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void nsHtml5OwningUTF16Buffer::Swap(nsHtml5OwningUTF16Buffer* aOther) {
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nsHtml5UTF16Buffer::Swap(aOther);
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}
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Span<char16_t> nsHtml5OwningUTF16Buffer::TailAsSpan(int32_t aBufferSize) {
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MOZ_ASSERT(aBufferSize >= getEnd());
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return {getBuffer() + getEnd(), static_cast<size_t>(aBufferSize - getEnd())};
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}
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void nsHtml5OwningUTF16Buffer::AdvanceEnd(int32_t aNumberOfCodeUnits) {
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setEnd(getEnd() + aNumberOfCodeUnits);
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}
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