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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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78 } | 78 } |
79 | 79 |
80 | 80 |
81 void PromotionQueue::ActivateGuardIfOnTheSamePage() { | 81 void PromotionQueue::ActivateGuardIfOnTheSamePage() { |
82 guard_ = guard_ || | 82 guard_ = guard_ || |
83 heap_->new_space()->active_space()->current_page()->address() == | 83 heap_->new_space()->active_space()->current_page()->address() == |
84 GetHeadPage()->address(); | 84 GetHeadPage()->address(); |
85 } | 85 } |
86 | 86 |
87 | 87 |
88 MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> str, | |
89 PretenureFlag pretenure) { | |
90 // Check for ASCII first since this is the common case. | |
91 const char* start = str.start(); | |
92 int length = str.length(); | |
93 int non_ascii_start = String::NonAsciiStart(start, length); | |
94 if (non_ascii_start >= length) { | |
95 // If the string is ASCII, we do not need to convert the characters | |
96 // since UTF8 is backwards compatible with ASCII. | |
97 return AllocateStringFromOneByte(str, pretenure); | |
98 } | |
99 // Non-ASCII and we need to decode. | |
100 return AllocateStringFromUtf8Slow(str, non_ascii_start, pretenure); | |
101 } | |
102 | |
103 | |
104 template<> | 88 template<> |
105 bool inline Heap::IsOneByte(Vector<const char> str, int chars) { | 89 bool inline Heap::IsOneByte(Vector<const char> str, int chars) { |
106 // TODO(dcarney): incorporate Latin-1 check when Latin-1 is supported? | 90 // TODO(dcarney): incorporate Latin-1 check when Latin-1 is supported? |
107 // ASCII only check. | 91 // ASCII only check. |
108 return chars == str.length(); | 92 return chars == str.length(); |
109 } | 93 } |
110 | 94 |
111 | 95 |
112 template<> | 96 template<> |
113 bool inline Heap::IsOneByte(String* str, int chars) { | 97 bool inline Heap::IsOneByte(String* str, int chars) { |
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808 | 792 |
809 | 793 |
810 double GCTracer::SizeOfHeapObjects() { | 794 double GCTracer::SizeOfHeapObjects() { |
811 return (static_cast<double>(heap_->SizeOfObjects())) / MB; | 795 return (static_cast<double>(heap_->SizeOfObjects())) / MB; |
812 } | 796 } |
813 | 797 |
814 | 798 |
815 } } // namespace v8::internal | 799 } } // namespace v8::internal |
816 | 800 |
817 #endif // V8_HEAP_INL_H_ | 801 #endif // V8_HEAP_INL_H_ |
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