зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
2.3 KiB
C++
100 строки
2.3 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)
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, next(nullptr)
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, key(nullptr)
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{
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}
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nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(void* aKey)
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: nsHtml5UTF16Buffer(nullptr, 0)
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, next(nullptr)
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, key(aKey)
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{
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}
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nsHtml5OwningUTF16Buffer::~nsHtml5OwningUTF16Buffer()
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{
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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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{
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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
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nsHtml5OwningUTF16Buffer::Swap(nsHtml5OwningUTF16Buffer* aOther)
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{
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nsHtml5UTF16Buffer::Swap(aOther);
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}
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Span<char16_t>
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nsHtml5OwningUTF16Buffer::TailAsSpan(int32_t aBufferSize)
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{
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MOZ_ASSERT(aBufferSize >= getEnd());
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return MakeSpan(getBuffer() + getEnd(), aBufferSize - getEnd());
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}
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void
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nsHtml5OwningUTF16Buffer::AdvanceEnd(int32_t aNumberOfCodeUnits)
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{
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setEnd(getEnd() + aNumberOfCodeUnits);
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}
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// Not using macros for AddRef and Release in order to be able to refcount on
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// and create on different threads.
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nsrefcnt
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nsHtml5OwningUTF16Buffer::AddRef()
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{
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NS_PRECONDITION(int32_t(mRefCnt) >= 0, "Illegal refcount.");
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++mRefCnt;
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NS_LOG_ADDREF(this, mRefCnt, "nsHtml5OwningUTF16Buffer", sizeof(*this));
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return mRefCnt;
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}
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nsrefcnt
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nsHtml5OwningUTF16Buffer::Release()
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{
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NS_PRECONDITION(0 != mRefCnt, "Release without AddRef.");
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--mRefCnt;
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NS_LOG_RELEASE(this, mRefCnt, "nsHtml5OwningUTF16Buffer");
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if (mRefCnt == 0) {
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mRefCnt = 1; /* stabilize */
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delete this;
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return 0;
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}
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return mRefCnt;
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}
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