michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsHtml5OwningUTF16Buffer.h"
michael@0: 
michael@0: nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(char16_t* aBuffer)
michael@0:   : nsHtml5UTF16Buffer(aBuffer, 0),
michael@0:     next(nullptr),
michael@0:     key(nullptr)
michael@0: {
michael@0:   MOZ_COUNT_CTOR(nsHtml5OwningUTF16Buffer);
michael@0: }
michael@0: 
michael@0: nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(void* aKey)
michael@0:   : nsHtml5UTF16Buffer(nullptr, 0),
michael@0:     next(nullptr),
michael@0:     key(aKey)
michael@0: {
michael@0:   MOZ_COUNT_CTOR(nsHtml5OwningUTF16Buffer);
michael@0: }
michael@0: 
michael@0: nsHtml5OwningUTF16Buffer::~nsHtml5OwningUTF16Buffer()
michael@0: {
michael@0:   MOZ_COUNT_DTOR(nsHtml5OwningUTF16Buffer);
michael@0:   DeleteBuffer();
michael@0: 
michael@0:   // This is to avoid dtor recursion on 'next', bug 706932.
michael@0:   nsRefPtr<nsHtml5OwningUTF16Buffer> tail;
michael@0:   tail.swap(next);
michael@0:   while (tail && tail->mRefCnt == 1) {
michael@0:     nsRefPtr<nsHtml5OwningUTF16Buffer> tmp;
michael@0:     tmp.swap(tail->next);
michael@0:     tail.swap(tmp);
michael@0:   }
michael@0: }
michael@0: 
michael@0: // static
michael@0: already_AddRefed<nsHtml5OwningUTF16Buffer>
michael@0: nsHtml5OwningUTF16Buffer::FalliblyCreate(int32_t aLength)
michael@0: {
michael@0:   const mozilla::fallible_t fallible = mozilla::fallible_t();
michael@0:   char16_t* newBuf = new (fallible) char16_t[aLength];
michael@0:   if (!newBuf) {
michael@0:     return nullptr;
michael@0:   }
michael@0:   nsRefPtr<nsHtml5OwningUTF16Buffer> newObj =
michael@0:     new (fallible) nsHtml5OwningUTF16Buffer(newBuf);
michael@0:   if (!newObj) {
michael@0:     delete[] newBuf;
michael@0:     return nullptr;
michael@0:   }
michael@0:   return newObj.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: nsHtml5OwningUTF16Buffer::Swap(nsHtml5OwningUTF16Buffer* aOther)
michael@0: {
michael@0:   nsHtml5UTF16Buffer::Swap(aOther);
michael@0: }
michael@0: 
michael@0: 
michael@0: // Not using macros for AddRef and Release in order to be able to refcount on
michael@0: // and create on different threads.
michael@0: 
michael@0: nsrefcnt
michael@0: nsHtml5OwningUTF16Buffer::AddRef()
michael@0: {
michael@0:   NS_PRECONDITION(int32_t(mRefCnt) >= 0, "Illegal refcount.");
michael@0:   ++mRefCnt;
michael@0:   NS_LOG_ADDREF(this, mRefCnt, "nsHtml5OwningUTF16Buffer", sizeof(*this));
michael@0:   return mRefCnt;
michael@0: }
michael@0: 
michael@0: nsrefcnt
michael@0: nsHtml5OwningUTF16Buffer::Release()
michael@0: {
michael@0:   NS_PRECONDITION(0 != mRefCnt, "Release without AddRef.");
michael@0:   --mRefCnt;
michael@0:   NS_LOG_RELEASE(this, mRefCnt, "nsHtml5OwningUTF16Buffer");
michael@0:   if (mRefCnt == 0) {
michael@0:     mRefCnt = 1; /* stabilize */
michael@0:     delete this;
michael@0:     return 0;
michael@0:   }
michael@0:   return mRefCnt;
michael@0: }