runtime/WriteBarrierInlines.h

   1 /*
   2  * Copyright (C) 2014 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 WriteBarrierInlines_h
  27 #define WriteBarrierInlines_h
  28
  29 #include "VM.h"
  30 #include "WriteBarrier.h"
  31
  32 namespace JSC {
  33
  34 template <typename T>
  35 inline void WriteBarrierBase<T>::set(VM& vm, const JSCell* owner, T* value)
  36 {
  37     ASSERT(value);
  38     ASSERT(!Options::enableConcurrentJIT() || !isCompilationThread());
  39     validateCell(value);
  40     setEarlyValue(vm, owner, value);
  41 }
  42
  43 template <typename T>
  44 inline void WriteBarrierBase<T>::setMayBeNull(VM& vm, const JSCell* owner, T* value)
  45 {
  46     if (value)
  47         validateCell(value);
  48     setEarlyValue(vm, owner, value);
  49 }
  50
  51 template <typename T>
  52 inline void WriteBarrierBase<T>::setEarlyValue(VM& vm, const JSCell* owner, T* value)
  53 {
  54     this->m_cell = reinterpret_cast<JSCell*>(value);
  55     vm.heap.writeBarrier(owner, this->m_cell);
  56 }
  57
  58 inline void WriteBarrierBase<Unknown>::set(VM& vm, const JSCell* owner, JSValue value)
  59 {
  60     ASSERT(!Options::enableConcurrentJIT() || !isCompilationThread());
  61     m_value = JSValue::encode(value);
  62     vm.heap.writeBarrier(owner, value);
  63 }
  64
  65 } // namespace JSC
  66
  67 #endif // WriteBarrierInlines_h