1 // Raw memory manipulators -*- C++ -*- 2 3 // Copyright (C) 2001-2013 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /* 26 * 27 * Copyright (c) 1994 28 * Hewlett-Packard Company 29 * 30 * Permission to use, copy, modify, distribute and sell this software 31 * and its documentation for any purpose is hereby granted without fee, 32 * provided that the above copyright notice appear in all copies and 33 * that both that copyright notice and this permission notice appear 34 * in supporting documentation. Hewlett-Packard Company makes no 35 * representations about the suitability of this software for any 36 * purpose. It is provided "as is" without express or implied warranty. 37 * 38 * 39 * Copyright (c) 1996,1997 40 * Silicon Graphics Computer Systems, Inc. 41 * 42 * Permission to use, copy, modify, distribute and sell this software 43 * and its documentation for any purpose is hereby granted without fee, 44 * provided that the above copyright notice appear in all copies and 45 * that both that copyright notice and this permission notice appear 46 * in supporting documentation. Silicon Graphics makes no 47 * representations about the suitability of this software for any 48 * purpose. It is provided "as is" without express or implied warranty. 49 */ 50 51 /** @file bits/stl_uninitialized.h 52 * This is an internal header file, included by other library headers. 53 * Do not attempt to use it directly. @headername{memory} 54 */ 55 56 #ifndef _STL_UNINITIALIZED_H 57 #define _STL_UNINITIALIZED_H 1 58 59 namespace std _GLIBCXX_VISIBILITY(default) 60 { 61 _GLIBCXX_BEGIN_NAMESPACE_VERSION 62 63 template<bool _TrivialValueTypes> 64 struct __uninitialized_copy 65 { 66 template<typename _InputIterator, typename _ForwardIterator> 67 static _ForwardIterator 68 __uninit_copy(_InputIterator __first, _InputIterator __last, 69 _ForwardIterator __result) 70 { 71 _ForwardIterator __cur = __result; 72 __try 73 { 74 for (; __first != __last; ++__first, ++__cur) 75 std::_Construct(std::__addressof(*__cur), *__first); 76 return __cur; 77 } 78 __catch(...) 79 { 80 std::_Destroy(__result, __cur); 81 __throw_exception_again; 82 } 83 } 84 }; 85 86 template<> 87 struct __uninitialized_copy<true> 88 { 89 template<typename _InputIterator, typename _ForwardIterator> 90 static _ForwardIterator 91 __uninit_copy(_InputIterator __first, _InputIterator __last, 92 _ForwardIterator __result) 93 { return std::copy(__first, __last, __result); } 94 }; 95 96 /** 97 * @brief Copies the range [first,last) into result. 98 * @param __first An input iterator. 99 * @param __last An input iterator. 100 * @param __result An output iterator. 101 * @return __result + (__first - __last) 102 * 103 * Like copy(), but does not require an initialized output range. 104 */ 105 template<typename _InputIterator, typename _ForwardIterator> 106 inline _ForwardIterator 107 uninitialized_copy(_InputIterator __first, _InputIterator __last, 108 _ForwardIterator __result) 109 { 110 typedef typename iterator_traits<_InputIterator>::value_type 111 _ValueType1; 112 typedef typename iterator_traits<_ForwardIterator>::value_type 113 _ValueType2; 114 115 return std::__uninitialized_copy<(__is_trivial(_ValueType1) 116 && __is_trivial(_ValueType2))>:: 117 __uninit_copy(__first, __last, __result); 118 } 119 120 121 template<bool _TrivialValueType> 122 struct __uninitialized_fill 123 { 124 template<typename _ForwardIterator, typename _Tp> 125 static void 126 __uninit_fill(_ForwardIterator __first, _ForwardIterator __last, 127 const _Tp& __x) 128 { 129 _ForwardIterator __cur = __first; 130 __try 131 { 132 for (; __cur != __last; ++__cur) 133 std::_Construct(std::__addressof(*__cur), __x); 134 } 135 __catch(...) 136 { 137 std::_Destroy(__first, __cur); 138 __throw_exception_again; 139 } 140 } 141 }; 142 143 template<> 144 struct __uninitialized_fill<true> 145 { 146 template<typename _ForwardIterator, typename _Tp> 147 static void 148 __uninit_fill(_ForwardIterator __first, _ForwardIterator __last, 149 const _Tp& __x) 150 { std::fill(__first, __last, __x); } 151 }; 152 153 /** 154 * @brief Copies the value x into the range [first,last). 155 * @param __first An input iterator. 156 * @param __last An input iterator. 157 * @param __x The source value. 158 * @return Nothing. 159 * 160 * Like fill(), but does not require an initialized output range. 161 */ 162 template<typename _ForwardIterator, typename _Tp> 163 inline void 164 uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last, 165 const _Tp& __x) 166 { 167 typedef typename iterator_traits<_ForwardIterator>::value_type 168 _ValueType; 169 170 std::__uninitialized_fill<__is_trivial(_ValueType)>:: 171 __uninit_fill(__first, __last, __x); 172 } 173 174 175 template<bool _TrivialValueType> 176 struct __uninitialized_fill_n 177 { 178 template<typename _ForwardIterator, typename _Size, typename _Tp> 179 static void 180 __uninit_fill_n(_ForwardIterator __first, _Size __n, 181 const _Tp& __x) 182 { 183 _ForwardIterator __cur = __first; 184 __try 185 { 186 for (; __n > 0; --__n, ++__cur) 187 std::_Construct(std::__addressof(*__cur), __x); 188 } 189 __catch(...) 190 { 191 std::_Destroy(__first, __cur); 192 __throw_exception_again; 193 } 194 } 195 }; 196 197 template<> 198 struct __uninitialized_fill_n<true> 199 { 200 template<typename _ForwardIterator, typename _Size, typename _Tp> 201 static void 202 __uninit_fill_n(_ForwardIterator __first, _Size __n, 203 const _Tp& __x) 204 { std::fill_n(__first, __n, __x); } 205 }; 206 207 /** 208 * @brief Copies the value x into the range [first,first+n). 209 * @param __first An input iterator. 210 * @param __n The number of copies to make. 211 * @param __x The source value. 212 * @return Nothing. 213 * 214 * Like fill_n(), but does not require an initialized output range. 215 */ 216 template<typename _ForwardIterator, typename _Size, typename _Tp> 217 inline void 218 uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x) 219 { 220 typedef typename iterator_traits<_ForwardIterator>::value_type 221 _ValueType; 222 223 std::__uninitialized_fill_n<__is_trivial(_ValueType)>:: 224 __uninit_fill_n(__first, __n, __x); 225 } 226 227 // Extensions: versions of uninitialized_copy, uninitialized_fill, 228 // and uninitialized_fill_n that take an allocator parameter. 229 // We dispatch back to the standard versions when we're given the 230 // default allocator. For nondefault allocators we do not use 231 // any of the POD optimizations. 232 233 template<typename _InputIterator, typename _ForwardIterator, 234 typename _Allocator> 235 _ForwardIterator 236 __uninitialized_copy_a(_InputIterator __first, _InputIterator __last, 237 _ForwardIterator __result, _Allocator& __alloc) 238 { 239 _ForwardIterator __cur = __result; 240 __try 241 { 242 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 243 for (; __first != __last; ++__first, ++__cur) 244 __traits::construct(__alloc, std::__addressof(*__cur), *__first); 245 return __cur; 246 } 247 __catch(...) 248 { 249 std::_Destroy(__result, __cur, __alloc); 250 __throw_exception_again; 251 } 252 } 253 254 template<typename _InputIterator, typename _ForwardIterator, typename _Tp> 255 inline _ForwardIterator 256 __uninitialized_copy_a(_InputIterator __first, _InputIterator __last, 257 _ForwardIterator __result, allocator<_Tp>&) 258 { return std::uninitialized_copy(__first, __last, __result); } 259 260 template<typename _InputIterator, typename _ForwardIterator, 261 typename _Allocator> 262 inline _ForwardIterator 263 __uninitialized_move_a(_InputIterator __first, _InputIterator __last, 264 _ForwardIterator __result, _Allocator& __alloc) 265 { 266 return std::__uninitialized_copy_a(_GLIBCXX_MAKE_MOVE_ITERATOR(__first), 267 _GLIBCXX_MAKE_MOVE_ITERATOR(__last), 268 __result, __alloc); 269 } 270 271 template<typename _InputIterator, typename _ForwardIterator, 272 typename _Allocator> 273 inline _ForwardIterator 274 __uninitialized_move_if_noexcept_a(_InputIterator __first, 275 _InputIterator __last, 276 _ForwardIterator __result, 277 _Allocator& __alloc) 278 { 279 return std::__uninitialized_copy_a 280 (_GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(__first), 281 _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(__last), __result, __alloc); 282 } 283 284 template<typename _ForwardIterator, typename _Tp, typename _Allocator> 285 void 286 __uninitialized_fill_a(_ForwardIterator __first, _ForwardIterator __last, 287 const _Tp& __x, _Allocator& __alloc) 288 { 289 _ForwardIterator __cur = __first; 290 __try 291 { 292 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 293 for (; __cur != __last; ++__cur) 294 __traits::construct(__alloc, std::__addressof(*__cur), __x); 295 } 296 __catch(...) 297 { 298 std::_Destroy(__first, __cur, __alloc); 299 __throw_exception_again; 300 } 301 } 302 303 template<typename _ForwardIterator, typename _Tp, typename _Tp2> 304 inline void 305 __uninitialized_fill_a(_ForwardIterator __first, _ForwardIterator __last, 306 const _Tp& __x, allocator<_Tp2>&) 307 { std::uninitialized_fill(__first, __last, __x); } 308 309 template<typename _ForwardIterator, typename _Size, typename _Tp, 310 typename _Allocator> 311 void 312 __uninitialized_fill_n_a(_ForwardIterator __first, _Size __n, 313 const _Tp& __x, _Allocator& __alloc) 314 { 315 _ForwardIterator __cur = __first; 316 __try 317 { 318 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 319 for (; __n > 0; --__n, ++__cur) 320 __traits::construct(__alloc, std::__addressof(*__cur), __x); 321 } 322 __catch(...) 323 { 324 std::_Destroy(__first, __cur, __alloc); 325 __throw_exception_again; 326 } 327 } 328 329 template<typename _ForwardIterator, typename _Size, typename _Tp, 330 typename _Tp2> 331 inline void 332 __uninitialized_fill_n_a(_ForwardIterator __first, _Size __n, 333 const _Tp& __x, allocator<_Tp2>&) 334 { std::uninitialized_fill_n(__first, __n, __x); } 335 336 337 // Extensions: __uninitialized_copy_move, __uninitialized_move_copy, 338 // __uninitialized_fill_move, __uninitialized_move_fill. 339 // All of these algorithms take a user-supplied allocator, which is used 340 // for construction and destruction. 341 342 // __uninitialized_copy_move 343 // Copies [first1, last1) into [result, result + (last1 - first1)), and 344 // move [first2, last2) into 345 // [result, result + (last1 - first1) + (last2 - first2)). 346 template<typename _InputIterator1, typename _InputIterator2, 347 typename _ForwardIterator, typename _Allocator> 348 inline _ForwardIterator 349 __uninitialized_copy_move(_InputIterator1 __first1, 350 _InputIterator1 __last1, 351 _InputIterator2 __first2, 352 _InputIterator2 __last2, 353 _ForwardIterator __result, 354 _Allocator& __alloc) 355 { 356 _ForwardIterator __mid = std::__uninitialized_copy_a(__first1, __last1, 357 __result, 358 __alloc); 359 __try 360 { 361 return std::__uninitialized_move_a(__first2, __last2, __mid, __alloc); 362 } 363 __catch(...) 364 { 365 std::_Destroy(__result, __mid, __alloc); 366 __throw_exception_again; 367 } 368 } 369 370 // __uninitialized_move_copy 371 // Moves [first1, last1) into [result, result + (last1 - first1)), and 372 // copies [first2, last2) into 373 // [result, result + (last1 - first1) + (last2 - first2)). 374 template<typename _InputIterator1, typename _InputIterator2, 375 typename _ForwardIterator, typename _Allocator> 376 inline _ForwardIterator 377 __uninitialized_move_copy(_InputIterator1 __first1, 378 _InputIterator1 __last1, 379 _InputIterator2 __first2, 380 _InputIterator2 __last2, 381 _ForwardIterator __result, 382 _Allocator& __alloc) 383 { 384 _ForwardIterator __mid = std::__uninitialized_move_a(__first1, __last1, 385 __result, 386 __alloc); 387 __try 388 { 389 return std::__uninitialized_copy_a(__first2, __last2, __mid, __alloc); 390 } 391 __catch(...) 392 { 393 std::_Destroy(__result, __mid, __alloc); 394 __throw_exception_again; 395 } 396 } 397 398 // __uninitialized_fill_move 399 // Fills [result, mid) with x, and moves [first, last) into 400 // [mid, mid + (last - first)). 401 template<typename _ForwardIterator, typename _Tp, typename _InputIterator, 402 typename _Allocator> 403 inline _ForwardIterator 404 __uninitialized_fill_move(_ForwardIterator __result, _ForwardIterator __mid, 405 const _Tp& __x, _InputIterator __first, 406 _InputIterator __last, _Allocator& __alloc) 407 { 408 std::__uninitialized_fill_a(__result, __mid, __x, __alloc); 409 __try 410 { 411 return std::__uninitialized_move_a(__first, __last, __mid, __alloc); 412 } 413 __catch(...) 414 { 415 std::_Destroy(__result, __mid, __alloc); 416 __throw_exception_again; 417 } 418 } 419 420 // __uninitialized_move_fill 421 // Moves [first1, last1) into [first2, first2 + (last1 - first1)), and 422 // fills [first2 + (last1 - first1), last2) with x. 423 template<typename _InputIterator, typename _ForwardIterator, typename _Tp, 424 typename _Allocator> 425 inline void 426 __uninitialized_move_fill(_InputIterator __first1, _InputIterator __last1, 427 _ForwardIterator __first2, 428 _ForwardIterator __last2, const _Tp& __x, 429 _Allocator& __alloc) 430 { 431 _ForwardIterator __mid2 = std::__uninitialized_move_a(__first1, __last1, 432 __first2, 433 __alloc); 434 __try 435 { 436 std::__uninitialized_fill_a(__mid2, __last2, __x, __alloc); 437 } 438 __catch(...) 439 { 440 std::_Destroy(__first2, __mid2, __alloc); 441 __throw_exception_again; 442 } 443 } 444 445 #if __cplusplus >= 201103L 446 // Extensions: __uninitialized_default, __uninitialized_default_n, 447 // __uninitialized_default_a, __uninitialized_default_n_a. 448 449 template<bool _TrivialValueType> 450 struct __uninitialized_default_1 451 { 452 template<typename _ForwardIterator> 453 static void 454 __uninit_default(_ForwardIterator __first, _ForwardIterator __last) 455 { 456 _ForwardIterator __cur = __first; 457 __try 458 { 459 for (; __cur != __last; ++__cur) 460 std::_Construct(std::__addressof(*__cur)); 461 } 462 __catch(...) 463 { 464 std::_Destroy(__first, __cur); 465 __throw_exception_again; 466 } 467 } 468 }; 469 470 template<> 471 struct __uninitialized_default_1<true> 472 { 473 template<typename _ForwardIterator> 474 static void 475 __uninit_default(_ForwardIterator __first, _ForwardIterator __last) 476 { 477 typedef typename iterator_traits<_ForwardIterator>::value_type 478 _ValueType; 479 480 std::fill(__first, __last, _ValueType()); 481 } 482 }; 483 484 template<bool _TrivialValueType> 485 struct __uninitialized_default_n_1 486 { 487 template<typename _ForwardIterator, typename _Size> 488 static void 489 __uninit_default_n(_ForwardIterator __first, _Size __n) 490 { 491 _ForwardIterator __cur = __first; 492 __try 493 { 494 for (; __n > 0; --__n, ++__cur) 495 std::_Construct(std::__addressof(*__cur)); 496 } 497 __catch(...) 498 { 499 std::_Destroy(__first, __cur); 500 __throw_exception_again; 501 } 502 } 503 }; 504 505 template<> 506 struct __uninitialized_default_n_1<true> 507 { 508 template<typename _ForwardIterator, typename _Size> 509 static void 510 __uninit_default_n(_ForwardIterator __first, _Size __n) 511 { 512 typedef typename iterator_traits<_ForwardIterator>::value_type 513 _ValueType; 514 515 std::fill_n(__first, __n, _ValueType()); 516 } 517 }; 518 519 // __uninitialized_default 520 // Fills [first, last) with std::distance(first, last) default 521 // constructed value_types(s). 522 template<typename _ForwardIterator> 523 inline void 524 __uninitialized_default(_ForwardIterator __first, 525 _ForwardIterator __last) 526 { 527 typedef typename iterator_traits<_ForwardIterator>::value_type 528 _ValueType; 529 530 std::__uninitialized_default_1<__is_trivial(_ValueType)>:: 531 __uninit_default(__first, __last); 532 } 533 534 // __uninitialized_default_n 535 // Fills [first, first + n) with n default constructed value_type(s). 536 template<typename _ForwardIterator, typename _Size> 537 inline void 538 __uninitialized_default_n(_ForwardIterator __first, _Size __n) 539 { 540 typedef typename iterator_traits<_ForwardIterator>::value_type 541 _ValueType; 542 543 std::__uninitialized_default_n_1<__is_trivial(_ValueType)>:: 544 __uninit_default_n(__first, __n); 545 } 546 547 548 // __uninitialized_default_a 549 // Fills [first, last) with std::distance(first, last) default 550 // constructed value_types(s), constructed with the allocator alloc. 551 template<typename _ForwardIterator, typename _Allocator> 552 void 553 __uninitialized_default_a(_ForwardIterator __first, 554 _ForwardIterator __last, 555 _Allocator& __alloc) 556 { 557 _ForwardIterator __cur = __first; 558 __try 559 { 560 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 561 for (; __cur != __last; ++__cur) 562 __traits::construct(__alloc, std::__addressof(*__cur)); 563 } 564 __catch(...) 565 { 566 std::_Destroy(__first, __cur, __alloc); 567 __throw_exception_again; 568 } 569 } 570 571 template<typename _ForwardIterator, typename _Tp> 572 inline void 573 __uninitialized_default_a(_ForwardIterator __first, 574 _ForwardIterator __last, 575 allocator<_Tp>&) 576 { std::__uninitialized_default(__first, __last); } 577 578 579 // __uninitialized_default_n_a 580 // Fills [first, first + n) with n default constructed value_types(s), 581 // constructed with the allocator alloc. 582 template<typename _ForwardIterator, typename _Size, typename _Allocator> 583 void 584 __uninitialized_default_n_a(_ForwardIterator __first, _Size __n, 585 _Allocator& __alloc) 586 { 587 _ForwardIterator __cur = __first; 588 __try 589 { 590 typedef __gnu_cxx::__alloc_traits<_Allocator> __traits; 591 for (; __n > 0; --__n, ++__cur) 592 __traits::construct(__alloc, std::__addressof(*__cur)); 593 } 594 __catch(...) 595 { 596 std::_Destroy(__first, __cur, __alloc); 597 __throw_exception_again; 598 } 599 } 600 601 template<typename _ForwardIterator, typename _Size, typename _Tp> 602 inline void 603 __uninitialized_default_n_a(_ForwardIterator __first, _Size __n, 604 allocator<_Tp>&) 605 { std::__uninitialized_default_n(__first, __n); } 606 607 608 template<typename _InputIterator, typename _Size, 609 typename _ForwardIterator> 610 _ForwardIterator 611 __uninitialized_copy_n(_InputIterator __first, _Size __n, 612 _ForwardIterator __result, input_iterator_tag) 613 { 614 _ForwardIterator __cur = __result; 615 __try 616 { 617 for (; __n > 0; --__n, ++__first, ++__cur) 618 std::_Construct(std::__addressof(*__cur), *__first); 619 return __cur; 620 } 621 __catch(...) 622 { 623 std::_Destroy(__result, __cur); 624 __throw_exception_again; 625 } 626 } 627 628 template<typename _RandomAccessIterator, typename _Size, 629 typename _ForwardIterator> 630 inline _ForwardIterator 631 __uninitialized_copy_n(_RandomAccessIterator __first, _Size __n, 632 _ForwardIterator __result, 633 random_access_iterator_tag) 634 { return std::uninitialized_copy(__first, __first + __n, __result); } 635 636 /** 637 * @brief Copies the range [first,first+n) into result. 638 * @param __first An input iterator. 639 * @param __n The number of elements to copy. 640 * @param __result An output iterator. 641 * @return __result + __n 642 * 643 * Like copy_n(), but does not require an initialized output range. 644 */ 645 template<typename _InputIterator, typename _Size, typename _ForwardIterator> 646 inline _ForwardIterator 647 uninitialized_copy_n(_InputIterator __first, _Size __n, 648 _ForwardIterator __result) 649 { return std::__uninitialized_copy_n(__first, __n, __result, 650 std::__iterator_category(__first)); } 651 #endif 652 653 _GLIBCXX_END_NAMESPACE_VERSION 654 } // namespace 655 656 #endif /* _STL_UNINITIALIZED_H */ 657
