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| 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 rathe
r than ref allows |
| 16 * resources that are owned by the program element to be correctly tracked as ha
ving pending reads |
| 17 * and writes rather than refs. |
| 18 */ |
| 19 template <typename T> class GrPendingProgramElement : SkNoncopyable { |
| 20 public: |
| 21 GrPendingProgramElement() : fObj(NULL) { }; |
| 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 |
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