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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkTypes_DEFINED | 8 #ifndef SkTypes_DEFINED |
9 #define SkTypes_DEFINED | 9 #define SkTypes_DEFINED |
10 | 10 |
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532 * block. | 532 * block. |
533 */ | 533 */ |
534 kReuse_OnShrink | 534 kReuse_OnShrink |
535 }; | 535 }; |
536 | 536 |
537 /** | 537 /** |
538 * Reallocates the block to a new size. The ptr may or may not change. | 538 * Reallocates the block to a new size. The ptr may or may not change. |
539 */ | 539 */ |
540 void* reset(size_t size, OnShrink shrink = kAlloc_OnShrink, bool* didChange
Alloc = NULL) { | 540 void* reset(size_t size, OnShrink shrink = kAlloc_OnShrink, bool* didChange
Alloc = NULL) { |
541 if (size == fSize || (kReuse_OnShrink == shrink && size < fSize)) { | 541 if (size == fSize || (kReuse_OnShrink == shrink && size < fSize)) { |
542 if (NULL != didChangeAlloc) { | 542 if (didChangeAlloc) { |
543 *didChangeAlloc = false; | 543 *didChangeAlloc = false; |
544 } | 544 } |
545 return fPtr; | 545 return fPtr; |
546 } | 546 } |
547 | 547 |
548 sk_free(fPtr); | 548 sk_free(fPtr); |
549 fPtr = size ? sk_malloc_throw(size) : NULL; | 549 fPtr = size ? sk_malloc_throw(size) : NULL; |
550 fSize = size; | 550 fSize = size; |
551 if (NULL != didChangeAlloc) { | 551 if (didChangeAlloc) { |
552 *didChangeAlloc = true; | 552 *didChangeAlloc = true; |
553 } | 553 } |
554 | 554 |
555 return fPtr; | 555 return fPtr; |
556 } | 556 } |
557 | 557 |
558 /** | 558 /** |
559 * Releases the block back to the heap | 559 * Releases the block back to the heap |
560 */ | 560 */ |
561 void free() { | 561 void free() { |
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636 * Return a new block of the requested size, freeing (as necessary) any | 636 * Return a new block of the requested size, freeing (as necessary) any |
637 * previously allocated block. As with the constructor, if size <= kSize | 637 * previously allocated block. As with the constructor, if size <= kSize |
638 * then the return block may be allocated locally, rather than from the | 638 * then the return block may be allocated locally, rather than from the |
639 * heap. | 639 * heap. |
640 */ | 640 */ |
641 void* reset(size_t size, | 641 void* reset(size_t size, |
642 SkAutoMalloc::OnShrink shrink = SkAutoMalloc::kAlloc_OnShrink, | 642 SkAutoMalloc::OnShrink shrink = SkAutoMalloc::kAlloc_OnShrink, |
643 bool* didChangeAlloc = NULL) { | 643 bool* didChangeAlloc = NULL) { |
644 size = (size < kSize) ? kSize : size; | 644 size = (size < kSize) ? kSize : size; |
645 bool alloc = size != fSize && (SkAutoMalloc::kAlloc_OnShrink == shrink |
| size > fSize); | 645 bool alloc = size != fSize && (SkAutoMalloc::kAlloc_OnShrink == shrink |
| size > fSize); |
646 if (NULL != didChangeAlloc) { | 646 if (didChangeAlloc) { |
647 *didChangeAlloc = alloc; | 647 *didChangeAlloc = alloc; |
648 } | 648 } |
649 if (alloc) { | 649 if (alloc) { |
650 if (fPtr != (void*)fStorage) { | 650 if (fPtr != (void*)fStorage) { |
651 sk_free(fPtr); | 651 sk_free(fPtr); |
652 } | 652 } |
653 | 653 |
654 if (size == kSize) { | 654 if (size == kSize) { |
655 SkASSERT(fPtr != fStorage); // otherwise we lied when setting di
dChangeAlloc. | 655 SkASSERT(fPtr != fStorage); // otherwise we lied when setting di
dChangeAlloc. |
656 fPtr = fStorage; | 656 fPtr = fStorage; |
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668 private: | 668 private: |
669 void* fPtr; | 669 void* fPtr; |
670 size_t fSize; // can be larger than the requested size (see kReuse) | 670 size_t fSize; // can be larger than the requested size (see kReuse) |
671 uint32_t fStorage[(kSize + 3) >> 2]; | 671 uint32_t fStorage[(kSize + 3) >> 2]; |
672 }; | 672 }; |
673 // Can't guard the constructor because it's a template class. | 673 // Can't guard the constructor because it's a template class. |
674 | 674 |
675 #endif /* C++ */ | 675 #endif /* C++ */ |
676 | 676 |
677 #endif | 677 #endif |
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