1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
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3 // modification, are permitted provided that the following conditions are
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7 // notice, this list of conditions and the following disclaimer.
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11 // with the distribution.
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31 namespace v8 { namespace internal {
34 // ----------------------------------------------------------------------------
35 // The list is a template for very light-weight lists. We are not
36 // using the STL because we want full control over space and speed of
37 // the code. This implementation is based on code by Robert Griesemer
40 // The list is parameterized by the type of its elements (T) and by an
41 // allocation policy (P). The policy is used for allocating lists in
42 // the C free store or the zone; see zone.h.
45 // template <typename T, class P = FreeStoreAllocationPolicy> class List;
46 template <typename T, class P>
50 INLINE(explicit List(int capacity)) { Initialize(capacity); }
51 INLINE(~List()) { DeleteData(data_); }
53 INLINE(void* operator new(size_t size)) { return P::New(size); }
54 INLINE(void operator delete(void* p, size_t)) { return P::Delete(p); }
56 inline T& operator[](int i) const {
57 ASSERT(0 <= i && i < length_);
60 inline T& at(int i) const { return operator[](i); }
61 inline T& last() const {
63 return at(length_ - 1);
66 INLINE(bool is_empty() const) { return length_ == 0; }
67 INLINE(int length() const) { return length_; }
69 Vector<T> ToVector() { return Vector<T>(data_, length_); }
71 Vector<const T> ToConstVector() { return Vector<const T>(data_, length_); }
73 // Adds a copy of the given 'element' to the end of the list,
74 // expanding the list if necessary.
75 T& Add(const T& element);
77 // Added 'count' elements with the value 'value' and returns a
78 // vector that allows access to the elements. The vector is valid
79 // until the next change is made to this list.
80 Vector<T> AddBlock(const T& value, int count);
82 // Inserts a copy of the given element at index i in the list. All
83 // elements formerly at or above i are moved up and the length of
84 // the list increases by one. This function's complexity is linear
85 // in the size of the list.
86 T& Insert(int i, const T& element);
88 // Removes the i'th element without deleting it even if T is a
89 // pointer type; moves all elements above i "down". Returns the
90 // removed element. This function's complexity is linear in the
94 // Removes the last element without deleting it even if T is a
95 // pointer type. Returns the removed element.
96 INLINE(T RemoveLast()) { return Remove(length_ - 1); }
98 // Clears the list by setting the length to zero. Even if T is a
99 // pointer type, clearing the list doesn't delete the entries.
100 INLINE(void Clear());
102 // Drops all but the first 'pos' elements from the list.
103 INLINE(void Rewind(int pos));
105 bool Contains(const T& elm);
107 // Iterate through all list entries, starting at index 0.
108 void Iterate(void (*callback)(T* x));
110 // Sort all list entries (using QuickSort)
111 void Sort(int (*cmp)(const T* x, const T* y));
114 INLINE(void Initialize(int capacity));
121 INLINE(T* NewData(int n)) { return static_cast<T*>(P::New(n * sizeof(T))); }
122 INLINE(void DeleteData(T* data)) { P::Delete(data); }
124 DISALLOW_COPY_AND_ASSIGN(List);
128 } } // namespace v8::internal