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| 1 | |
| 2 /* | |
| 3 * Copyright 2006 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkTemplatesPriv_DEFINED | |
| 11 #define SkTemplatesPriv_DEFINED | |
| 12 | |
| 13 #include "SkTemplates.h" | |
| 14 | |
| 15 //////////////////////////////////////////////////////////////////////////////// | |
| 16 | |
| 17 #ifdef SK_BUILD_FOR_WIN32 | |
| 18 #define SK_PLACEMENT_NEW(result, classname, storage, storageSize) \ | |
| 19 result = SkNEW(classname) | |
| 20 | |
| 21 #define SK_PLACEMENT_NEW_ARGS(result, classname, storage, storageSize, args)
\ | |
| 22 result = SkNEW_ARGS(classname, args) | |
| 23 #else | |
| 24 #include <new> | |
| 25 #define SK_PLACEMENT_NEW(result, classname, storage, storagesize) \ | |
| 26 do { \ | |
| 27 if (storagesize) \ | |
| 28 { \ | |
| 29 SkASSERT(storageSize >= sizeof(classname)); \ | |
| 30 result = new(storage) classname; \ | |
| 31 } \ | |
| 32 else \ | |
| 33 result = SkNEW(classname); \ | |
| 34 } while (0) | |
| 35 | |
| 36 #define SK_PLACEMENT_NEW_ARGS(result, classname, storage, storagesize, args)
\ | |
| 37 do {
\ | |
| 38 if (storagesize)
\ | |
| 39 {
\ | |
| 40 SkASSERT(storageSize >= sizeof(classname));
\ | |
| 41 result = new(storage) classname args;
\ | |
| 42 }
\ | |
| 43 else
\ | |
| 44 result = SkNEW_ARGS(classname, args);
\ | |
| 45 } while (0) | |
| 46 #endif | |
| 47 | |
| 48 //////////////////////////////////////////////////////////////////////////////// | |
| 49 | |
| 50 template <class T> class SkAutoTPlacementDelete { | |
| 51 public: | |
| 52 SkAutoTPlacementDelete(T* obj, void* storage) : fObj(obj), fStorage(storage) | |
| 53 { | |
| 54 } | |
| 55 ~SkAutoTPlacementDelete() | |
| 56 { | |
| 57 if (fObj) | |
| 58 { | |
| 59 if (fObj == fStorage) | |
| 60 fObj->~T(); | |
| 61 else | |
| 62 delete fObj; | |
| 63 } | |
| 64 } | |
| 65 T* detach() | |
| 66 { | |
| 67 T* obj = fObj; | |
| 68 fObj = NULL; | |
| 69 return obj; | |
| 70 } | |
| 71 private: | |
| 72 T* fObj; | |
| 73 void* fStorage; | |
| 74 }; | |
| 75 | |
| 76 #endif | |
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Chromium Code Reviews
Issue 179343005:
Add a class to allocate small objects w/o extra calls to new. (Closed)
Base URL: https://skia.googlesource.com/skia.git@master