1 /*

     2  * Copyright (C) 2009 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #include "config.h"

    27 #include "RopeImpl.h"

    28 

    29 namespace JSC {

    30 

    31 void RopeImpl::derefFibersNonRecursive(Vector<RopeImpl*, 32>& workQueue)

    32 {

    33     unsigned fiberCount = this->fiberCount();

    34     for (unsigned i = 0; i < fiberCount; ++i) {

    35         Fiber& fiber = m_fibers[i];

    36         if (isRope(fiber)) {

    37             RopeImpl* nextRope = static_cast<RopeImpl*>(fiber);

    38             if (nextRope->hasOneRef())

    39                 workQueue.append(nextRope);

    40             else

    41                 nextRope->deref();

    42         } else

    43             static_cast<UStringImpl*>(fiber)->deref();

    44     }

    45 }

    46 

    47 void RopeImpl::destructNonRecursive()

    48 {

    49     Vector<RopeImpl*, 32> workQueue;

    50 

    51     derefFibersNonRecursive(workQueue);

    52     delete this;

    53 

    54     while (!workQueue.isEmpty()) {

    55         RopeImpl* rope = workQueue.last();

    56         workQueue.removeLast();

    57         rope->derefFibersNonRecursive(workQueue);

    58         delete rope;

    59     }

    60 }

    61 

    62 } // namespace JSC