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      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<StringImpl*>(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
     63