runtime/WeakGCMapInlines.h

   1 /*
   2  * Copyright (C) 2015 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. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef WeakGCMapInlines_h
  27 #define WeakGCMapInlines_h
  28
  29 #include "HeapInlines.h"
  30 #include "WeakGCMap.h"
  31
  32 namespace JSC {
  33
  34 template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
  35 inline WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::WeakGCMap(VM& vm)
  36     : m_vm(vm)
  37 {
  38     vm.heap.registerWeakGCMap(this, [this]() {
  39         pruneStaleEntries();
  40     });
  41 }
  42
  43 template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
  44 inline WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::~WeakGCMap()
  45 {
  46     m_vm.heap.unregisterWeakGCMap(this);
  47 }
  48
  49 template<typename KeyArg, typename ValueArg, typename HashArg, typename KeyTraitsArg>
  50 NEVER_INLINE void WeakGCMap<KeyArg, ValueArg, HashArg, KeyTraitsArg>::pruneStaleEntries()
  51 {
  52     m_map.removeIf([](typename HashMapType::KeyValuePairType& entry) {
  53         return !entry.value;
  54     });
  55 }
  56
  57 } // namespace JSC
  58
  59 #endif // WeakGCMapInlines_h