bsalomon | ae59b77 | 2014-11-19 08:23:49 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #ifndef GrPendingProgramElement_DEFINED |
| 9 | #define GrPendingProgramElement_DEFINED |
| 10 | |
| 11 | #include "SkRefCnt.h" |
| 12 | #include "GrTypes.h" |
| 13 | |
| 14 | /** |
| 15 | * Helper for owning a pending execution on a GrProgramElement. Using this rather than ref allows |
| 16 | * resources that are owned by the program element to be correctly tracked as having pending reads |
| 17 | * and writes rather than refs. |
| 18 | */ |
| 19 | template <typename T> class GrPendingProgramElement : SkNoncopyable { |
| 20 | public: |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 21 | GrPendingProgramElement() : fObj(nullptr) { }; |
bsalomon | ae59b77 | 2014-11-19 08:23:49 -0800 | [diff] [blame] | 22 | |
| 23 | // Adds a pending execution on obj. |
| 24 | explicit GrPendingProgramElement(T* obj) : fObj(obj) { |
| 25 | if (obj) { |
| 26 | obj->addPendingExecution(); |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | void reset(T* obj) { |
| 31 | if (obj) { |
| 32 | obj->addPendingExecution(); |
| 33 | } |
| 34 | if (fObj) { |
| 35 | fObj->completedExecution(); |
| 36 | } |
| 37 | fObj = obj; |
| 38 | } |
| 39 | |
| 40 | T* get() const { return fObj; } |
| 41 | operator T*() { return fObj; } |
| 42 | |
| 43 | T *operator->() const { return fObj; } |
| 44 | |
| 45 | ~GrPendingProgramElement() { |
| 46 | if (fObj) { |
| 47 | fObj->completedExecution(); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | private: |
| 52 | T* fObj; |
| 53 | |
| 54 | typedef SkNoncopyable INHERITED; |
| 55 | }; |
| 56 | #endif |