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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | 4 // |
5 // Review notes: | 5 // Review notes: |
6 // | 6 // |
7 // - The use of macros in these inline functions may seem superfluous | 7 // - The use of macros in these inline functions may seem superfluous |
8 // but it is absolutely needed to make sure gcc generates optimal | 8 // but it is absolutely needed to make sure gcc generates optimal |
9 // code. gcc is not happy when attempting to inline too deep. | 9 // code. gcc is not happy when attempting to inline too deep. |
10 // | 10 // |
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1998 this == GetHeap()->empty_weak_cell()); | 1998 this == GetHeap()->empty_weak_cell()); |
1999 WRITE_FIELD(this, kValueOffset, Smi::kZero); | 1999 WRITE_FIELD(this, kValueOffset, Smi::kZero); |
2000 } | 2000 } |
2001 | 2001 |
2002 | 2002 |
2003 void WeakCell::initialize(HeapObject* val) { | 2003 void WeakCell::initialize(HeapObject* val) { |
2004 WRITE_FIELD(this, kValueOffset, val); | 2004 WRITE_FIELD(this, kValueOffset, val); |
2005 // We just have to execute the generational barrier here because we never | 2005 // We just have to execute the generational barrier here because we never |
2006 // mark through a weak cell and collect evacuation candidates when we process | 2006 // mark through a weak cell and collect evacuation candidates when we process |
2007 // all weak cells. | 2007 // all weak cells. |
2008 WriteBarrierMode mode = ObjectMarking::IsBlack(this) | 2008 WriteBarrierMode mode = |
2009 ? UPDATE_WRITE_BARRIER | 2009 ObjectMarking::IsBlack(this, MarkingState::Internal(this)) |
2010 : UPDATE_WEAK_WRITE_BARRIER; | 2010 ? UPDATE_WRITE_BARRIER |
| 2011 : UPDATE_WEAK_WRITE_BARRIER; |
2011 CONDITIONAL_WRITE_BARRIER(GetHeap(), this, kValueOffset, val, mode); | 2012 CONDITIONAL_WRITE_BARRIER(GetHeap(), this, kValueOffset, val, mode); |
2012 } | 2013 } |
2013 | 2014 |
2014 bool WeakCell::cleared() const { return value() == Smi::kZero; } | 2015 bool WeakCell::cleared() const { return value() == Smi::kZero; } |
2015 | 2016 |
2016 Object* WeakCell::next() const { return READ_FIELD(this, kNextOffset); } | 2017 Object* WeakCell::next() const { return READ_FIELD(this, kNextOffset); } |
2017 | 2018 |
2018 | 2019 |
2019 void WeakCell::set_next(Object* val, WriteBarrierMode mode) { | 2020 void WeakCell::set_next(Object* val, WriteBarrierMode mode) { |
2020 WRITE_FIELD(this, kNextOffset, val); | 2021 WRITE_FIELD(this, kNextOffset, val); |
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8238 #undef WRITE_BYTE_FIELD | 8239 #undef WRITE_BYTE_FIELD |
8239 #undef NOBARRIER_READ_BYTE_FIELD | 8240 #undef NOBARRIER_READ_BYTE_FIELD |
8240 #undef NOBARRIER_WRITE_BYTE_FIELD | 8241 #undef NOBARRIER_WRITE_BYTE_FIELD |
8241 | 8242 |
8242 } // namespace internal | 8243 } // namespace internal |
8243 } // namespace v8 | 8244 } // namespace v8 |
8244 | 8245 |
8245 #include "src/objects/object-macros-undef.h" | 8246 #include "src/objects/object-macros-undef.h" |
8246 | 8247 |
8247 #endif // V8_OBJECTS_INL_H_ | 8248 #endif // V8_OBJECTS_INL_H_ |
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