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      1 // Copyright 2011 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #ifndef V8_LIVEOBJECTLIST_INL_H_
     29 #define V8_LIVEOBJECTLIST_INL_H_
     30 
     31 #include "v8.h"
     32 
     33 #include "liveobjectlist.h"
     34 
     35 namespace v8 {
     36 namespace internal {
     37 
     38 #ifdef LIVE_OBJECT_LIST
     39 
     40 void LiveObjectList::GCEpilogue() {
     41   if (!NeedLOLProcessing()) return;
     42   GCEpiloguePrivate();
     43 }
     44 
     45 
     46 void LiveObjectList::GCPrologue() {
     47   if (!NeedLOLProcessing()) return;
     48 #ifdef VERIFY_LOL
     49   if (FLAG_verify_lol) {
     50     Verify();
     51   }
     52 #endif
     53 }
     54 
     55 
     56 void LiveObjectList::IterateElements(ObjectVisitor* v) {
     57   if (!NeedLOLProcessing()) return;
     58   IterateElementsPrivate(v);
     59 }
     60 
     61 
     62 void LiveObjectList::ProcessNonLive(HeapObject* obj) {
     63   // Only do work if we have at least one list to process.
     64   if (last()) DoProcessNonLive(obj);
     65 }
     66 
     67 
     68 void LiveObjectList::UpdateReferencesForScavengeGC() {
     69   if (LiveObjectList::NeedLOLProcessing()) {
     70     UpdateLiveObjectListVisitor update_visitor;
     71     LiveObjectList::IterateElements(&update_visitor);
     72   }
     73 }
     74 
     75 
     76 LiveObjectList* LiveObjectList::FindLolForId(int id,
     77                                              LiveObjectList* start_lol) {
     78   if (id != 0) {
     79     LiveObjectList* lol = start_lol;
     80     while (lol != NULL) {
     81       if (lol->id() == id) {
     82         return lol;
     83       }
     84       lol = lol->prev_;
     85     }
     86   }
     87   return NULL;
     88 }
     89 
     90 
     91 // Iterates the elements in every lol and returns the one that matches the
     92 // specified key.  If no matching element is found, then it returns NULL.
     93 template <typename T>
     94 inline LiveObjectList::Element*
     95 LiveObjectList::FindElementFor(T (*GetValue)(LiveObjectList::Element*), T key) {
     96   LiveObjectList* lol = last();
     97   while (lol != NULL) {
     98     Element* elements = lol->elements_;
     99     for (int i = 0; i < lol->obj_count_; i++) {
    100       Element* element = &elements[i];
    101       if (GetValue(element) == key) {
    102         return element;
    103       }
    104     }
    105     lol = lol->prev_;
    106   }
    107   return NULL;
    108 }
    109 
    110 
    111 inline int LiveObjectList::GetElementId(LiveObjectList::Element* element) {
    112   return element->id_;
    113 }
    114 
    115 
    116 inline HeapObject*
    117 LiveObjectList::GetElementObj(LiveObjectList::Element* element) {
    118   return element->obj_;
    119 }
    120 
    121 #endif  // LIVE_OBJECT_LIST
    122 
    123 } }  // namespace v8::internal
    124 
    125 #endif  // V8_LIVEOBJECTLIST_INL_H_
    126 
    127