The Tor Browser: parser/html/nsHtml5OwningUTF16Buffer.cpp@8bccb770b82d

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #include "nsHtml5OwningUTF16Buffer.h"

     7 nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(char16_t* aBuffer)

     8   : nsHtml5UTF16Buffer(aBuffer, 0),

     9     next(nullptr),

    10     key(nullptr)

    11 {

    12   MOZ_COUNT_CTOR(nsHtml5OwningUTF16Buffer);

    13 }

    15 nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(void* aKey)

    16   : nsHtml5UTF16Buffer(nullptr, 0),

    17     next(nullptr),

    18     key(aKey)

    19 {

    20   MOZ_COUNT_CTOR(nsHtml5OwningUTF16Buffer);

    21 }

    23 nsHtml5OwningUTF16Buffer::~nsHtml5OwningUTF16Buffer()

    24 {

    25   MOZ_COUNT_DTOR(nsHtml5OwningUTF16Buffer);

    26   DeleteBuffer();

    28   // This is to avoid dtor recursion on 'next', bug 706932.

    29   nsRefPtr<nsHtml5OwningUTF16Buffer> tail;

    30   tail.swap(next);

    31   while (tail && tail->mRefCnt == 1) {

    32     nsRefPtr<nsHtml5OwningUTF16Buffer> tmp;

    33     tmp.swap(tail->next);

    34     tail.swap(tmp);

    35   }

    36 }

    38 // static

    39 already_AddRefed<nsHtml5OwningUTF16Buffer>

    40 nsHtml5OwningUTF16Buffer::FalliblyCreate(int32_t aLength)

    41 {

    42   const mozilla::fallible_t fallible = mozilla::fallible_t();

    43   char16_t* newBuf = new (fallible) char16_t[aLength];

    44   if (!newBuf) {

    45     return nullptr;

    46   }

    47   nsRefPtr<nsHtml5OwningUTF16Buffer> newObj =

    48     new (fallible) nsHtml5OwningUTF16Buffer(newBuf);

    49   if (!newObj) {

    50     delete[] newBuf;

    51     return nullptr;

    52   }

    53   return newObj.forget();

    54 }

    56 void

    57 nsHtml5OwningUTF16Buffer::Swap(nsHtml5OwningUTF16Buffer* aOther)

    58 {

    59   nsHtml5UTF16Buffer::Swap(aOther);

    60 }

    63 // Not using macros for AddRef and Release in order to be able to refcount on

    64 // and create on different threads.

    66 nsrefcnt

    67 nsHtml5OwningUTF16Buffer::AddRef()

    68 {

    69   NS_PRECONDITION(int32_t(mRefCnt) >= 0, "Illegal refcount.");

    70   ++mRefCnt;

    71   NS_LOG_ADDREF(this, mRefCnt, "nsHtml5OwningUTF16Buffer", sizeof(*this));

    72   return mRefCnt;

    73 }

    75 nsrefcnt

    76 nsHtml5OwningUTF16Buffer::Release()

    77 {

    78   NS_PRECONDITION(0 != mRefCnt, "Release without AddRef.");

    79   --mRefCnt;

    80   NS_LOG_RELEASE(this, mRefCnt, "nsHtml5OwningUTF16Buffer");

    81   if (mRefCnt == 0) {

    82     mRefCnt = 1; /* stabilize */

    83     delete this;

    84     return 0;

    85   }

    86   return mRefCnt;

    87 }

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