Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/growableArray.hpp @ 20314:46bbe04d1cad
8039498: Add iterators to GrowableArray
Summary: To simplify the management of multiple code heaps in the code cache (see JDK-8015774), STL-style iterator capability is added to the GrowableArray. Further, custom iterators allow to only iterate over elements that satisfy a given predicate.
Reviewed-by: kvn, twisti
Contributed-by: Tobias Hartmann <tobias.hartmann@oracle.com>
author | anoll |
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date | Fri, 11 Apr 2014 13:52:51 +0200 |
parents | 55fb97c4c58d |
children | 411e30e5fbb8 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_UTILITIES_GROWABLEARRAY_HPP |
26 #define SHARE_VM_UTILITIES_GROWABLEARRAY_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "memory/allocation.inline.hpp" | |
30 #include "utilities/debug.hpp" | |
31 #include "utilities/globalDefinitions.hpp" | |
32 #include "utilities/top.hpp" | |
33 | |
0 | 34 // A growable array. |
35 | |
36 /*************************************************************************/ | |
37 /* */ | |
38 /* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING */ | |
39 /* */ | |
40 /* Should you use GrowableArrays to contain handles you must be certain */ | |
41 /* the the GrowableArray does not outlive the HandleMark that contains */ | |
42 /* the handles. Since GrowableArrays are typically resource allocated */ | |
43 /* the following is an example of INCORRECT CODE, */ | |
44 /* */ | |
45 /* ResourceMark rm; */ | |
46 /* GrowableArray<Handle>* arr = new GrowableArray<Handle>(size); */ | |
47 /* if (blah) { */ | |
48 /* while (...) { */ | |
49 /* HandleMark hm; */ | |
50 /* ... */ | |
51 /* Handle h(THREAD, some_oop); */ | |
52 /* arr->append(h); */ | |
53 /* } */ | |
54 /* } */ | |
55 /* if (arr->length() != 0 ) { */ | |
56 /* oop bad_oop = arr->at(0)(); // Handle is BAD HERE. */ | |
57 /* ... */ | |
58 /* } */ | |
59 /* */ | |
60 /* If the GrowableArrays you are creating is C_Heap allocated then it */ | |
61 /* hould not old handles since the handles could trivially try and */ | |
62 /* outlive their HandleMark. In some situations you might need to do */ | |
63 /* this and it would be legal but be very careful and see if you can do */ | |
64 /* the code in some other manner. */ | |
65 /* */ | |
66 /*************************************************************************/ | |
67 | |
68 // To call default constructor the placement operator new() is used. | |
69 // It should be empty (it only returns the passed void* pointer). | |
70 // The definition of placement operator new(size_t, void*) in the <new>. | |
71 | |
72 #include <new> | |
73 | |
74 // Need the correct linkage to call qsort without warnings | |
75 extern "C" { | |
76 typedef int (*_sort_Fn)(const void *, const void *); | |
77 } | |
78 | |
79 class GenericGrowableArray : public ResourceObj { | |
3939 | 80 friend class VMStructs; |
81 | |
0 | 82 protected: |
83 int _len; // current length | |
84 int _max; // maximum length | |
85 Arena* _arena; // Indicates where allocation occurs: | |
86 // 0 means default ResourceArea | |
87 // 1 means on C heap | |
88 // otherwise, allocate in _arena | |
6197 | 89 |
90 MEMFLAGS _memflags; // memory type if allocation in C heap | |
91 | |
0 | 92 #ifdef ASSERT |
93 int _nesting; // resource area nesting at creation | |
94 void set_nesting(); | |
95 void check_nesting(); | |
96 #else | |
97 #define set_nesting(); | |
98 #define check_nesting(); | |
99 #endif | |
100 | |
101 // Where are we going to allocate memory? | |
102 bool on_C_heap() { return _arena == (Arena*)1; } | |
103 bool on_stack () { return _arena == NULL; } | |
104 bool on_arena () { return _arena > (Arena*)1; } | |
105 | |
106 // This GA will use the resource stack for storage if c_heap==false, | |
107 // Else it will use the C heap. Use clear_and_deallocate to avoid leaks. | |
6197 | 108 GenericGrowableArray(int initial_size, int initial_len, bool c_heap, MEMFLAGS flags = mtNone) { |
0 | 109 _len = initial_len; |
110 _max = initial_size; | |
6197 | 111 _memflags = flags; |
112 | |
113 // memory type has to be specified for C heap allocation | |
114 assert(!(c_heap && flags == mtNone), "memory type not specified for C heap object"); | |
115 | |
0 | 116 assert(_len >= 0 && _len <= _max, "initial_len too big"); |
117 _arena = (c_heap ? (Arena*)1 : NULL); | |
118 set_nesting(); | |
1685 | 119 assert(!on_C_heap() || allocated_on_C_heap(), "growable array must be on C heap if elements are"); |
120 assert(!on_stack() || | |
121 (allocated_on_res_area() || allocated_on_stack()), | |
122 "growable array must be on stack if elements are not on arena and not on C heap"); | |
0 | 123 } |
124 | |
125 // This GA will use the given arena for storage. | |
126 // Consider using new(arena) GrowableArray<T> to allocate the header. | |
127 GenericGrowableArray(Arena* arena, int initial_size, int initial_len) { | |
128 _len = initial_len; | |
129 _max = initial_size; | |
130 assert(_len >= 0 && _len <= _max, "initial_len too big"); | |
131 _arena = arena; | |
6197 | 132 _memflags = mtNone; |
133 | |
0 | 134 assert(on_arena(), "arena has taken on reserved value 0 or 1"); |
1685 | 135 // Relax next assert to allow object allocation on resource area, |
136 // on stack or embedded into an other object. | |
137 assert(allocated_on_arena() || allocated_on_stack(), | |
138 "growable array must be on arena or on stack if elements are on arena"); | |
0 | 139 } |
140 | |
141 void* raw_allocate(int elementSize); | |
432 | 142 |
143 // some uses pass the Thread explicitly for speed (4990299 tuning) | |
144 void* raw_allocate(Thread* thread, int elementSize) { | |
145 assert(on_stack(), "fast ResourceObj path only"); | |
146 return (void*)resource_allocate_bytes(thread, elementSize * _max); | |
147 } | |
0 | 148 }; |
149 | |
20314 | 150 template<class E> class GrowableArrayIterator; |
151 template<class E, class UnaryPredicate> class GrowableArrayFilterIterator; | |
152 | |
0 | 153 template<class E> class GrowableArray : public GenericGrowableArray { |
3939 | 154 friend class VMStructs; |
155 | |
0 | 156 private: |
157 E* _data; // data array | |
158 | |
159 void grow(int j); | |
160 void raw_at_put_grow(int i, const E& p, const E& fill); | |
161 void clear_and_deallocate(); | |
162 public: | |
432 | 163 GrowableArray(Thread* thread, int initial_size) : GenericGrowableArray(initial_size, 0, false) { |
164 _data = (E*)raw_allocate(thread, sizeof(E)); | |
165 for (int i = 0; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
166 } | |
167 | |
6197 | 168 GrowableArray(int initial_size, bool C_heap = false, MEMFLAGS F = mtInternal) |
169 : GenericGrowableArray(initial_size, 0, C_heap, F) { | |
0 | 170 _data = (E*)raw_allocate(sizeof(E)); |
171 for (int i = 0; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
172 } | |
173 | |
6197 | 174 GrowableArray(int initial_size, int initial_len, const E& filler, bool C_heap = false, MEMFLAGS memflags = mtInternal) |
175 : GenericGrowableArray(initial_size, initial_len, C_heap, memflags) { | |
0 | 176 _data = (E*)raw_allocate(sizeof(E)); |
177 int i = 0; | |
178 for (; i < _len; i++) ::new ((void*)&_data[i]) E(filler); | |
179 for (; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
180 } | |
181 | |
182 GrowableArray(Arena* arena, int initial_size, int initial_len, const E& filler) : GenericGrowableArray(arena, initial_size, initial_len) { | |
183 _data = (E*)raw_allocate(sizeof(E)); | |
184 int i = 0; | |
185 for (; i < _len; i++) ::new ((void*)&_data[i]) E(filler); | |
186 for (; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
187 } | |
188 | |
189 GrowableArray() : GenericGrowableArray(2, 0, false) { | |
190 _data = (E*)raw_allocate(sizeof(E)); | |
191 ::new ((void*)&_data[0]) E(); | |
192 ::new ((void*)&_data[1]) E(); | |
193 } | |
194 | |
195 // Does nothing for resource and arena objects | |
196 ~GrowableArray() { if (on_C_heap()) clear_and_deallocate(); } | |
197 | |
198 void clear() { _len = 0; } | |
199 int length() const { return _len; } | |
12080 | 200 int max_length() const { return _max; } |
0 | 201 void trunc_to(int l) { assert(l <= _len,"cannot increase length"); _len = l; } |
202 bool is_empty() const { return _len == 0; } | |
203 bool is_nonempty() const { return _len != 0; } | |
204 bool is_full() const { return _len == _max; } | |
205 DEBUG_ONLY(E* data_addr() const { return _data; }) | |
206 | |
207 void print(); | |
208 | |
432 | 209 int append(const E& elem) { |
0 | 210 check_nesting(); |
211 if (_len == _max) grow(_len); | |
432 | 212 int idx = _len++; |
213 _data[idx] = elem; | |
214 return idx; | |
0 | 215 } |
216 | |
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217 bool append_if_missing(const E& elem) { |
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218 // Returns TRUE if elem is added. |
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219 bool missed = !contains(elem); |
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220 if (missed) append(elem); |
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221 return missed; |
0 | 222 } |
223 | |
6934 | 224 E& at(int i) { |
225 assert(0 <= i && i < _len, "illegal index"); | |
226 return _data[i]; | |
227 } | |
228 | |
229 E const& at(int i) const { | |
0 | 230 assert(0 <= i && i < _len, "illegal index"); |
231 return _data[i]; | |
232 } | |
233 | |
234 E* adr_at(int i) const { | |
235 assert(0 <= i && i < _len, "illegal index"); | |
236 return &_data[i]; | |
237 } | |
238 | |
239 E first() const { | |
240 assert(_len > 0, "empty list"); | |
241 return _data[0]; | |
242 } | |
243 | |
244 E top() const { | |
245 assert(_len > 0, "empty list"); | |
246 return _data[_len-1]; | |
247 } | |
248 | |
20314 | 249 GrowableArrayIterator<E> begin() const { |
250 return GrowableArrayIterator<E>(this, 0); | |
251 } | |
252 | |
253 GrowableArrayIterator<E> end() const { | |
254 return GrowableArrayIterator<E>(this, length()); | |
255 } | |
256 | |
0 | 257 void push(const E& elem) { append(elem); } |
258 | |
259 E pop() { | |
260 assert(_len > 0, "empty list"); | |
261 return _data[--_len]; | |
262 } | |
263 | |
264 void at_put(int i, const E& elem) { | |
265 assert(0 <= i && i < _len, "illegal index"); | |
266 _data[i] = elem; | |
267 } | |
268 | |
269 E at_grow(int i, const E& fill = E()) { | |
270 assert(0 <= i, "negative index"); | |
271 check_nesting(); | |
272 if (i >= _len) { | |
273 if (i >= _max) grow(i); | |
274 for (int j = _len; j <= i; j++) | |
275 _data[j] = fill; | |
276 _len = i+1; | |
277 } | |
278 return _data[i]; | |
279 } | |
280 | |
281 void at_put_grow(int i, const E& elem, const E& fill = E()) { | |
282 assert(0 <= i, "negative index"); | |
283 check_nesting(); | |
284 raw_at_put_grow(i, elem, fill); | |
285 } | |
286 | |
287 bool contains(const E& elem) const { | |
288 for (int i = 0; i < _len; i++) { | |
289 if (_data[i] == elem) return true; | |
290 } | |
291 return false; | |
292 } | |
293 | |
294 int find(const E& elem) const { | |
295 for (int i = 0; i < _len; i++) { | |
296 if (_data[i] == elem) return i; | |
297 } | |
298 return -1; | |
299 } | |
300 | |
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301 int find_from_end(const E& elem) const { |
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302 for (int i = _len-1; i >= 0; i--) { |
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303 if (_data[i] == elem) return i; |
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304 } |
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305 return -1; |
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306 } |
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307 |
0 | 308 int find(void* token, bool f(void*, E)) const { |
309 for (int i = 0; i < _len; i++) { | |
310 if (f(token, _data[i])) return i; | |
311 } | |
312 return -1; | |
313 } | |
314 | |
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315 int find_from_end(void* token, bool f(void*, E)) const { |
0 | 316 // start at the end of the array |
317 for (int i = _len-1; i >= 0; i--) { | |
318 if (f(token, _data[i])) return i; | |
319 } | |
320 return -1; | |
321 } | |
322 | |
323 void remove(const E& elem) { | |
324 for (int i = 0; i < _len; i++) { | |
325 if (_data[i] == elem) { | |
326 for (int j = i + 1; j < _len; j++) _data[j-1] = _data[j]; | |
327 _len--; | |
328 return; | |
329 } | |
330 } | |
331 ShouldNotReachHere(); | |
332 } | |
333 | |
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334 // The order is preserved. |
0 | 335 void remove_at(int index) { |
336 assert(0 <= index && index < _len, "illegal index"); | |
337 for (int j = index + 1; j < _len; j++) _data[j-1] = _data[j]; | |
338 _len--; | |
339 } | |
340 | |
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341 // The order is changed. |
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342 void delete_at(int index) { |
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343 assert(0 <= index && index < _len, "illegal index"); |
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344 if (index < --_len) { |
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345 // Replace removed element with last one. |
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346 _data[index] = _data[_len]; |
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347 } |
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348 } |
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349 |
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350 // inserts the given element before the element at index i |
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351 void insert_before(const int idx, const E& elem) { |
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352 check_nesting(); |
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353 if (_len == _max) grow(_len); |
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354 for (int j = _len - 1; j >= idx; j--) { |
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355 _data[j + 1] = _data[j]; |
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356 } |
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357 _len++; |
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358 _data[idx] = elem; |
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359 } |
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360 |
0 | 361 void appendAll(const GrowableArray<E>* l) { |
362 for (int i = 0; i < l->_len; i++) { | |
363 raw_at_put_grow(_len, l->_data[i], 0); | |
364 } | |
365 } | |
366 | |
367 void sort(int f(E*,E*)) { | |
368 qsort(_data, length(), sizeof(E), (_sort_Fn)f); | |
369 } | |
370 // sort by fixed-stride sub arrays: | |
371 void sort(int f(E*,E*), int stride) { | |
372 qsort(_data, length() / stride, sizeof(E) * stride, (_sort_Fn)f); | |
373 } | |
374 }; | |
375 | |
376 // Global GrowableArray methods (one instance in the library per each 'E' type). | |
377 | |
378 template<class E> void GrowableArray<E>::grow(int j) { | |
379 // grow the array by doubling its size (amortized growth) | |
380 int old_max = _max; | |
381 if (_max == 0) _max = 1; // prevent endless loop | |
382 while (j >= _max) _max = _max*2; | |
383 // j < _max | |
384 E* newData = (E*)raw_allocate(sizeof(E)); | |
385 int i = 0; | |
386 for ( ; i < _len; i++) ::new ((void*)&newData[i]) E(_data[i]); | |
387 for ( ; i < _max; i++) ::new ((void*)&newData[i]) E(); | |
388 for (i = 0; i < old_max; i++) _data[i].~E(); | |
389 if (on_C_heap() && _data != NULL) { | |
390 FreeHeap(_data); | |
391 } | |
392 _data = newData; | |
393 } | |
394 | |
395 template<class E> void GrowableArray<E>::raw_at_put_grow(int i, const E& p, const E& fill) { | |
396 if (i >= _len) { | |
397 if (i >= _max) grow(i); | |
398 for (int j = _len; j < i; j++) | |
399 _data[j] = fill; | |
400 _len = i+1; | |
401 } | |
402 _data[i] = p; | |
403 } | |
404 | |
405 // This function clears and deallocate the data in the growable array that | |
406 // has been allocated on the C heap. It's not public - called by the | |
407 // destructor. | |
408 template<class E> void GrowableArray<E>::clear_and_deallocate() { | |
409 assert(on_C_heap(), | |
410 "clear_and_deallocate should only be called when on C heap"); | |
411 clear(); | |
412 if (_data != NULL) { | |
413 for (int i = 0; i < _max; i++) _data[i].~E(); | |
414 FreeHeap(_data); | |
415 _data = NULL; | |
416 } | |
417 } | |
418 | |
419 template<class E> void GrowableArray<E>::print() { | |
420 tty->print("Growable Array " INTPTR_FORMAT, this); | |
421 tty->print(": length %ld (_max %ld) { ", _len, _max); | |
422 for (int i = 0; i < _len; i++) tty->print(INTPTR_FORMAT " ", *(intptr_t*)&(_data[i])); | |
423 tty->print("}\n"); | |
424 } | |
1972 | 425 |
20314 | 426 // Custom STL-style iterator to iterate over GrowableArrays |
427 // It is constructed by invoking GrowableArray::begin() and GrowableArray::end() | |
428 template<class E> class GrowableArrayIterator : public StackObj { | |
429 friend class GrowableArray<E>; | |
430 template<class F, class UnaryPredicate> friend class GrowableArrayFilterIterator; | |
431 | |
432 private: | |
433 const GrowableArray<E>* _array; // GrowableArray we iterate over | |
434 int _position; // The current position in the GrowableArray | |
435 | |
436 // Private constructor used in GrowableArray::begin() and GrowableArray::end() | |
437 GrowableArrayIterator(const GrowableArray<E>* array, int position) : _array(array), _position(position) { | |
438 assert(0 <= position && position <= _array->length(), "illegal position"); | |
439 } | |
440 | |
441 public: | |
442 GrowableArrayIterator<E>& operator++() { ++_position; return *this; } | |
443 E operator*() { return _array->at(_position); } | |
444 | |
445 bool operator==(const GrowableArrayIterator<E>& rhs) { | |
446 assert(_array == rhs._array, "iterator belongs to different array"); | |
447 return _position == rhs._position; | |
448 } | |
449 | |
450 bool operator!=(const GrowableArrayIterator<E>& rhs) { | |
451 assert(_array == rhs._array, "iterator belongs to different array"); | |
452 return _position != rhs._position; | |
453 } | |
454 }; | |
455 | |
456 // Custom STL-style iterator to iterate over elements of a GrowableArray that satisfy a given predicate | |
457 template<class E, class UnaryPredicate> class GrowableArrayFilterIterator : public StackObj { | |
458 friend class GrowableArray<E>; | |
459 | |
460 private: | |
461 const GrowableArray<E>* _array; // GrowableArray we iterate over | |
462 int _position; // Current position in the GrowableArray | |
463 UnaryPredicate _predicate; // Unary predicate the elements of the GrowableArray should satisfy | |
464 | |
465 public: | |
466 GrowableArrayFilterIterator(const GrowableArrayIterator<E>& begin, UnaryPredicate filter_predicate) | |
467 : _array(begin._array), _position(begin._position), _predicate(filter_predicate) { | |
468 // Advance to first element satisfying the predicate | |
469 while(_position != _array->length() && !_predicate(_array->at(_position))) { | |
470 ++_position; | |
471 } | |
472 } | |
473 | |
474 GrowableArrayFilterIterator<E, UnaryPredicate>& operator++() { | |
475 do { | |
476 // Advance to next element satisfying the predicate | |
477 ++_position; | |
478 } while(_position != _array->length() && !_predicate(_array->at(_position))); | |
479 return *this; | |
480 } | |
481 | |
482 E operator*() { return _array->at(_position); } | |
483 | |
484 bool operator==(const GrowableArrayIterator<E>& rhs) { | |
485 assert(_array == rhs._array, "iterator belongs to different array"); | |
486 return _position == rhs._position; | |
487 } | |
488 | |
489 bool operator!=(const GrowableArrayIterator<E>& rhs) { | |
490 assert(_array == rhs._array, "iterator belongs to different array"); | |
491 return _position != rhs._position; | |
492 } | |
493 | |
494 bool operator==(const GrowableArrayFilterIterator<E, UnaryPredicate>& rhs) { | |
495 assert(_array == rhs._array, "iterator belongs to different array"); | |
496 return _position == rhs._position; | |
497 } | |
498 | |
499 bool operator!=(const GrowableArrayFilterIterator<E, UnaryPredicate>& rhs) { | |
500 assert(_array == rhs._array, "iterator belongs to different array"); | |
501 return _position != rhs._position; | |
502 } | |
503 }; | |
504 | |
1972 | 505 #endif // SHARE_VM_UTILITIES_GROWABLEARRAY_HPP |