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annotate src/share/vm/utilities/growableArray.hpp @ 3939:f6f3bb0ee072
7088955: add C2 IR support to the SA
Reviewed-by: kvn
| author | never |
|---|---|
| date | Sun, 11 Sep 2011 14:48:24 -0700 |
| parents | f95d63e2154a |
| children | ee138854b3a6 |
| rev | line source |
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| 0 | 1 /* |
| 3939 | 2 * Copyright (c) 1997, 2011, 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 | |
| 89 #ifdef ASSERT | |
| 90 int _nesting; // resource area nesting at creation | |
| 91 void set_nesting(); | |
| 92 void check_nesting(); | |
| 93 #else | |
| 94 #define set_nesting(); | |
| 95 #define check_nesting(); | |
| 96 #endif | |
| 97 | |
| 98 // Where are we going to allocate memory? | |
| 99 bool on_C_heap() { return _arena == (Arena*)1; } | |
| 100 bool on_stack () { return _arena == NULL; } | |
| 101 bool on_arena () { return _arena > (Arena*)1; } | |
| 102 | |
| 103 // This GA will use the resource stack for storage if c_heap==false, | |
| 104 // Else it will use the C heap. Use clear_and_deallocate to avoid leaks. | |
| 105 GenericGrowableArray(int initial_size, int initial_len, bool c_heap) { | |
| 106 _len = initial_len; | |
| 107 _max = initial_size; | |
| 108 assert(_len >= 0 && _len <= _max, "initial_len too big"); | |
| 109 _arena = (c_heap ? (Arena*)1 : NULL); | |
| 110 set_nesting(); | |
| 1685 | 111 assert(!on_C_heap() || allocated_on_C_heap(), "growable array must be on C heap if elements are"); |
| 112 assert(!on_stack() || | |
| 113 (allocated_on_res_area() || allocated_on_stack()), | |
| 114 "growable array must be on stack if elements are not on arena and not on C heap"); | |
| 0 | 115 } |
| 116 | |
| 117 // This GA will use the given arena for storage. | |
| 118 // Consider using new(arena) GrowableArray<T> to allocate the header. | |
| 119 GenericGrowableArray(Arena* arena, int initial_size, int initial_len) { | |
| 120 _len = initial_len; | |
| 121 _max = initial_size; | |
| 122 assert(_len >= 0 && _len <= _max, "initial_len too big"); | |
| 123 _arena = arena; | |
| 124 assert(on_arena(), "arena has taken on reserved value 0 or 1"); | |
| 1685 | 125 // Relax next assert to allow object allocation on resource area, |
| 126 // on stack or embedded into an other object. | |
| 127 assert(allocated_on_arena() || allocated_on_stack(), | |
| 128 "growable array must be on arena or on stack if elements are on arena"); | |
| 0 | 129 } |
| 130 | |
| 131 void* raw_allocate(int elementSize); | |
| 432 | 132 |
| 133 // some uses pass the Thread explicitly for speed (4990299 tuning) | |
| 134 void* raw_allocate(Thread* thread, int elementSize) { | |
| 135 assert(on_stack(), "fast ResourceObj path only"); | |
| 136 return (void*)resource_allocate_bytes(thread, elementSize * _max); | |
| 137 } | |
| 0 | 138 }; |
| 139 | |
| 140 template<class E> class GrowableArray : public GenericGrowableArray { | |
| 3939 | 141 friend class VMStructs; |
| 142 | |
| 0 | 143 private: |
| 144 E* _data; // data array | |
| 145 | |
| 146 void grow(int j); | |
| 147 void raw_at_put_grow(int i, const E& p, const E& fill); | |
| 148 void clear_and_deallocate(); | |
| 149 public: | |
| 432 | 150 GrowableArray(Thread* thread, int initial_size) : GenericGrowableArray(initial_size, 0, false) { |
| 151 _data = (E*)raw_allocate(thread, sizeof(E)); | |
| 152 for (int i = 0; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
| 153 } | |
| 154 | |
| 0 | 155 GrowableArray(int initial_size, bool C_heap = false) : GenericGrowableArray(initial_size, 0, C_heap) { |
| 156 _data = (E*)raw_allocate(sizeof(E)); | |
| 157 for (int i = 0; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
| 158 } | |
| 159 | |
| 160 GrowableArray(int initial_size, int initial_len, const E& filler, bool C_heap = false) : GenericGrowableArray(initial_size, initial_len, C_heap) { | |
| 161 _data = (E*)raw_allocate(sizeof(E)); | |
| 162 int i = 0; | |
| 163 for (; i < _len; i++) ::new ((void*)&_data[i]) E(filler); | |
| 164 for (; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
| 165 } | |
| 166 | |
| 167 GrowableArray(Arena* arena, int initial_size, int initial_len, const E& filler) : GenericGrowableArray(arena, initial_size, initial_len) { | |
| 168 _data = (E*)raw_allocate(sizeof(E)); | |
| 169 int i = 0; | |
| 170 for (; i < _len; i++) ::new ((void*)&_data[i]) E(filler); | |
| 171 for (; i < _max; i++) ::new ((void*)&_data[i]) E(); | |
| 172 } | |
| 173 | |
| 174 GrowableArray() : GenericGrowableArray(2, 0, false) { | |
| 175 _data = (E*)raw_allocate(sizeof(E)); | |
| 176 ::new ((void*)&_data[0]) E(); | |
| 177 ::new ((void*)&_data[1]) E(); | |
| 178 } | |
| 179 | |
| 180 // Does nothing for resource and arena objects | |
| 181 ~GrowableArray() { if (on_C_heap()) clear_and_deallocate(); } | |
| 182 | |
| 183 void clear() { _len = 0; } | |
| 184 int length() const { return _len; } | |
| 185 void trunc_to(int l) { assert(l <= _len,"cannot increase length"); _len = l; } | |
| 186 bool is_empty() const { return _len == 0; } | |
| 187 bool is_nonempty() const { return _len != 0; } | |
| 188 bool is_full() const { return _len == _max; } | |
| 189 DEBUG_ONLY(E* data_addr() const { return _data; }) | |
| 190 | |
| 191 void print(); | |
| 192 | |
| 432 | 193 int append(const E& elem) { |
| 0 | 194 check_nesting(); |
| 195 if (_len == _max) grow(_len); | |
| 432 | 196 int idx = _len++; |
| 197 _data[idx] = elem; | |
| 198 return idx; | |
| 0 | 199 } |
| 200 | |
| 201 void append_if_missing(const E& elem) { | |
| 202 if (!contains(elem)) append(elem); | |
| 203 } | |
| 204 | |
| 205 E at(int i) const { | |
| 206 assert(0 <= i && i < _len, "illegal index"); | |
| 207 return _data[i]; | |
| 208 } | |
| 209 | |
| 210 E* adr_at(int i) const { | |
| 211 assert(0 <= i && i < _len, "illegal index"); | |
| 212 return &_data[i]; | |
| 213 } | |
| 214 | |
| 215 E first() const { | |
| 216 assert(_len > 0, "empty list"); | |
| 217 return _data[0]; | |
| 218 } | |
| 219 | |
| 220 E top() const { | |
| 221 assert(_len > 0, "empty list"); | |
| 222 return _data[_len-1]; | |
| 223 } | |
| 224 | |
| 225 void push(const E& elem) { append(elem); } | |
| 226 | |
| 227 E pop() { | |
| 228 assert(_len > 0, "empty list"); | |
| 229 return _data[--_len]; | |
| 230 } | |
| 231 | |
| 232 void at_put(int i, const E& elem) { | |
| 233 assert(0 <= i && i < _len, "illegal index"); | |
| 234 _data[i] = elem; | |
| 235 } | |
| 236 | |
| 237 E at_grow(int i, const E& fill = E()) { | |
| 238 assert(0 <= i, "negative index"); | |
| 239 check_nesting(); | |
| 240 if (i >= _len) { | |
| 241 if (i >= _max) grow(i); | |
| 242 for (int j = _len; j <= i; j++) | |
| 243 _data[j] = fill; | |
| 244 _len = i+1; | |
| 245 } | |
| 246 return _data[i]; | |
| 247 } | |
| 248 | |
| 249 void at_put_grow(int i, const E& elem, const E& fill = E()) { | |
| 250 assert(0 <= i, "negative index"); | |
| 251 check_nesting(); | |
| 252 raw_at_put_grow(i, elem, fill); | |
| 253 } | |
| 254 | |
| 255 bool contains(const E& elem) const { | |
| 256 for (int i = 0; i < _len; i++) { | |
| 257 if (_data[i] == elem) return true; | |
| 258 } | |
| 259 return false; | |
| 260 } | |
| 261 | |
| 262 int find(const E& elem) const { | |
| 263 for (int i = 0; i < _len; i++) { | |
| 264 if (_data[i] == elem) return i; | |
| 265 } | |
| 266 return -1; | |
| 267 } | |
| 268 | |
| 269 int find(void* token, bool f(void*, E)) const { | |
| 270 for (int i = 0; i < _len; i++) { | |
| 271 if (f(token, _data[i])) return i; | |
| 272 } | |
| 273 return -1; | |
| 274 } | |
| 275 | |
| 276 int find_at_end(void* token, bool f(void*, E)) const { | |
| 277 // start at the end of the array | |
| 278 for (int i = _len-1; i >= 0; i--) { | |
| 279 if (f(token, _data[i])) return i; | |
| 280 } | |
| 281 return -1; | |
| 282 } | |
| 283 | |
| 284 void remove(const E& elem) { | |
| 285 for (int i = 0; i < _len; i++) { | |
| 286 if (_data[i] == elem) { | |
| 287 for (int j = i + 1; j < _len; j++) _data[j-1] = _data[j]; | |
| 288 _len--; | |
| 289 return; | |
| 290 } | |
| 291 } | |
| 292 ShouldNotReachHere(); | |
| 293 } | |
| 294 | |
| 295 void remove_at(int index) { | |
| 296 assert(0 <= index && index < _len, "illegal index"); | |
| 297 for (int j = index + 1; j < _len; j++) _data[j-1] = _data[j]; | |
| 298 _len--; | |
| 299 } | |
| 300 | |
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301 // inserts the given element before the element at index i |
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302 void insert_before(const int idx, const E& elem) { |
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303 check_nesting(); |
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304 if (_len == _max) grow(_len); |
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305 for (int j = _len - 1; j >= idx; j--) { |
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306 _data[j + 1] = _data[j]; |
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307 } |
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308 _len++; |
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309 _data[idx] = elem; |
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310 } |
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311 |
| 0 | 312 void appendAll(const GrowableArray<E>* l) { |
| 313 for (int i = 0; i < l->_len; i++) { | |
| 314 raw_at_put_grow(_len, l->_data[i], 0); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 void sort(int f(E*,E*)) { | |
| 319 qsort(_data, length(), sizeof(E), (_sort_Fn)f); | |
| 320 } | |
| 321 // sort by fixed-stride sub arrays: | |
| 322 void sort(int f(E*,E*), int stride) { | |
| 323 qsort(_data, length() / stride, sizeof(E) * stride, (_sort_Fn)f); | |
| 324 } | |
| 325 }; | |
| 326 | |
| 327 // Global GrowableArray methods (one instance in the library per each 'E' type). | |
| 328 | |
| 329 template<class E> void GrowableArray<E>::grow(int j) { | |
| 330 // grow the array by doubling its size (amortized growth) | |
| 331 int old_max = _max; | |
| 332 if (_max == 0) _max = 1; // prevent endless loop | |
| 333 while (j >= _max) _max = _max*2; | |
| 334 // j < _max | |
| 335 E* newData = (E*)raw_allocate(sizeof(E)); | |
| 336 int i = 0; | |
| 337 for ( ; i < _len; i++) ::new ((void*)&newData[i]) E(_data[i]); | |
| 338 for ( ; i < _max; i++) ::new ((void*)&newData[i]) E(); | |
| 339 for (i = 0; i < old_max; i++) _data[i].~E(); | |
| 340 if (on_C_heap() && _data != NULL) { | |
| 341 FreeHeap(_data); | |
| 342 } | |
| 343 _data = newData; | |
| 344 } | |
| 345 | |
| 346 template<class E> void GrowableArray<E>::raw_at_put_grow(int i, const E& p, const E& fill) { | |
| 347 if (i >= _len) { | |
| 348 if (i >= _max) grow(i); | |
| 349 for (int j = _len; j < i; j++) | |
| 350 _data[j] = fill; | |
| 351 _len = i+1; | |
| 352 } | |
| 353 _data[i] = p; | |
| 354 } | |
| 355 | |
| 356 // This function clears and deallocate the data in the growable array that | |
| 357 // has been allocated on the C heap. It's not public - called by the | |
| 358 // destructor. | |
| 359 template<class E> void GrowableArray<E>::clear_and_deallocate() { | |
| 360 assert(on_C_heap(), | |
| 361 "clear_and_deallocate should only be called when on C heap"); | |
| 362 clear(); | |
| 363 if (_data != NULL) { | |
| 364 for (int i = 0; i < _max; i++) _data[i].~E(); | |
| 365 FreeHeap(_data); | |
| 366 _data = NULL; | |
| 367 } | |
| 368 } | |
| 369 | |
| 370 template<class E> void GrowableArray<E>::print() { | |
| 371 tty->print("Growable Array " INTPTR_FORMAT, this); | |
| 372 tty->print(": length %ld (_max %ld) { ", _len, _max); | |
| 373 for (int i = 0; i < _len; i++) tty->print(INTPTR_FORMAT " ", *(intptr_t*)&(_data[i])); | |
| 374 tty->print("}\n"); | |
| 375 } | |
| 1972 | 376 |
| 377 #endif // SHARE_VM_UTILITIES_GROWABLEARRAY_HPP |