Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/utilities/stack.hpp
src/share/vm/utilities/stack.hpp
- changeset 9316
- a27880c1288b
- parent 4153
- b9a9ed0f8eeb
- child 9448
- 73d689add964
equal
deleted
inserted
replaced
| 9315:d8af86b0b638 | 9316:a27880c1288b |
|---|---|
| 94 class Stack: public StackBase<F> | 94 class Stack: public StackBase<F> |
| 95 { | 95 { |
| 96 public: | 96 public: |
| 97 friend class StackIterator<E, F>; | 97 friend class StackIterator<E, F>; |
| 98 | 98 |
| 99 // Number of elements that fit in 4K bytes minus the size of two pointers | |
| 100 // (link field and malloc header). | |
| 101 static const size_t _default_segment_size = (4096 - 2 * sizeof(E*)) / sizeof(E); | |
| 102 static size_t default_segment_size() { return _default_segment_size; } | |
| 103 | |
| 99 // segment_size: number of items per segment | 104 // segment_size: number of items per segment |
| 100 // max_cache_size: maxmium number of *segments* to cache | 105 // max_cache_size: maxmium number of *segments* to cache |
| 101 // max_size: maximum number of items allowed, rounded to a multiple of | 106 // max_size: maximum number of items allowed, rounded to a multiple of |
| 102 // the segment size (0 == unlimited) | 107 // the segment size (0 == unlimited) |
| 103 inline Stack(size_t segment_size = default_segment_size(), | 108 inline Stack(size_t segment_size = _default_segment_size, |
| 104 size_t max_cache_size = 4, size_t max_size = 0); | 109 size_t max_cache_size = 4, size_t max_size = 0); |
| 105 inline ~Stack() { clear(true); } | 110 inline ~Stack() { clear(true); } |
| 106 | 111 |
| 107 inline bool is_empty() const { return this->_cur_seg == NULL; } | 112 inline bool is_empty() const { return this->_cur_seg == NULL; } |
| 108 inline bool is_full() const { return this->_full_seg_size >= this->max_size(); } | 113 inline bool is_full() const { return this->_full_seg_size >= this->max_size(); } |
| 119 inline E pop(); | 124 inline E pop(); |
| 120 | 125 |
| 121 // Clear everything from the stack, releasing the associated memory. If | 126 // Clear everything from the stack, releasing the associated memory. If |
| 122 // clear_cache is true, also release any cached segments. | 127 // clear_cache is true, also release any cached segments. |
| 123 void clear(bool clear_cache = false); | 128 void clear(bool clear_cache = false); |
| 124 | |
| 125 static inline size_t default_segment_size(); | |
| 126 | 129 |
| 127 protected: | 130 protected: |
| 128 // Each segment includes space for _seg_size elements followed by a link | 131 // Each segment includes space for _seg_size elements followed by a link |
| 129 // (pointer) to the previous segment; the space is allocated as a single block | 132 // (pointer) to the previous segment; the space is allocated as a single block |
| 130 // of size segment_bytes(). _seg_size is rounded up if necessary so the link | 133 // of size segment_bytes(). _seg_size is rounded up if necessary so the link |
