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      1 /*
      2  * Copyright (C) 2008 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 "StructureStubInfo.h"
     28 
     29 namespace JSC {
     30 
     31 #if ENABLE(JIT)
     32 void StructureStubInfo::deref()
     33 {
     34     switch (accessType) {
     35     case access_get_by_id_self:
     36         u.getByIdSelf.baseObjectStructure->deref();
     37         return;
     38     case access_get_by_id_proto:
     39         u.getByIdProto.baseObjectStructure->deref();
     40         u.getByIdProto.prototypeStructure->deref();
     41         return;
     42     case access_get_by_id_chain:
     43         u.getByIdChain.baseObjectStructure->deref();
     44         u.getByIdChain.chain->deref();
     45         return;
     46     case access_get_by_id_self_list: {
     47         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
     48         polymorphicStructures->derefStructures(u.getByIdSelfList.listSize);
     49         delete polymorphicStructures;
     50         return;
     51     }
     52     case access_get_by_id_proto_list: {
     53         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
     54         polymorphicStructures->derefStructures(u.getByIdProtoList.listSize);
     55         delete polymorphicStructures;
     56         return;
     57     }
     58     case access_put_by_id_transition:
     59         u.putByIdTransition.previousStructure->deref();
     60         u.putByIdTransition.structure->deref();
     61         u.putByIdTransition.chain->deref();
     62         return;
     63     case access_put_by_id_replace:
     64         u.putByIdReplace.baseObjectStructure->deref();
     65         return;
     66     case access_get_by_id:
     67     case access_put_by_id:
     68     case access_get_by_id_generic:
     69     case access_put_by_id_generic:
     70     case access_get_array_length:
     71     case access_get_string_length:
     72         // These instructions don't ref their Structures.
     73         return;
     74     default:
     75         ASSERT_NOT_REACHED();
     76     }
     77 }
     78 #endif
     79 
     80 } // namespace JSC
     81