The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/gpu/gl/debug/GrFakeRefObj.h
gfx/skia/trunk/src/gpu/gl/debug/GrFakeRefObj.h
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:dfea832beef7 |
|---|---|
| 1 /* | |
| 2 * Copyright 2012 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 GrFakeRefObj_DEFINED | |
| 9 #define GrFakeRefObj_DEFINED | |
| 10 | |
| 11 #include "SkTypes.h" | |
| 12 #include "gl/GrGLInterface.h" | |
| 13 | |
| 14 //////////////////////////////////////////////////////////////////////////////// | |
| 15 // This object is used to track the OpenGL objects. We don't use real | |
| 16 // reference counting (i.e., we don't free the objects when their ref count | |
| 17 // goes to 0) so that we can detect invalid memory accesses. The refs we | |
| 18 // are tracking in this class are actually OpenGL's references to the objects | |
| 19 // not "ours" | |
| 20 // Each object also gets a unique globally identifying ID | |
| 21 class GrFakeRefObj : public SkNoncopyable { | |
| 22 public: | |
| 23 GrFakeRefObj() | |
| 24 : fRef(0) | |
| 25 , fHighRefCount(0) | |
| 26 , fMarkedForDeletion(false) | |
| 27 , fDeleted(false) { | |
| 28 | |
| 29 // source for globally unique IDs - 0 is reserved! | |
| 30 static int fNextID = 0; | |
| 31 | |
| 32 fID = ++fNextID; | |
| 33 } | |
| 34 virtual ~GrFakeRefObj() {}; | |
| 35 | |
| 36 void ref() { | |
| 37 fRef++; | |
| 38 if (fHighRefCount < fRef) { | |
| 39 fHighRefCount = fRef; | |
| 40 } | |
| 41 } | |
| 42 void unref() { | |
| 43 fRef--; | |
| 44 GrAlwaysAssert(fRef >= 0); | |
| 45 | |
| 46 // often in OpenGL a given object may still be in use when the | |
| 47 // delete call is made. In these cases the object is marked | |
| 48 // for deletion and then freed when it is no longer in use | |
| 49 if (0 == fRef && fMarkedForDeletion) { | |
| 50 this->deleteAction(); | |
| 51 } | |
| 52 } | |
| 53 int getRefCount() const { return fRef; } | |
| 54 int getHighRefCount() const { return fHighRefCount; } | |
| 55 | |
| 56 GrGLuint getID() const { return fID; } | |
| 57 | |
| 58 void setMarkedForDeletion() { fMarkedForDeletion = true; } | |
| 59 bool getMarkedForDeletion() const { return fMarkedForDeletion; } | |
| 60 | |
| 61 bool getDeleted() const { return fDeleted; } | |
| 62 | |
| 63 // The deleteAction fires if the object has been marked for deletion but | |
| 64 // couldn't be deleted earlier due to refs | |
| 65 virtual void deleteAction() { | |
| 66 this->setDeleted(); | |
| 67 } | |
| 68 | |
| 69 protected: | |
| 70 private: | |
| 71 int fRef; // ref count | |
| 72 int fHighRefCount; // high water mark of the ref count | |
| 73 GrGLuint fID; // globally unique ID | |
| 74 bool fMarkedForDeletion; | |
| 75 // The deleted flag is only set when OpenGL thinks the object is deleted | |
| 76 // It is obviously still allocated w/in this framework | |
| 77 bool fDeleted; | |
| 78 | |
| 79 // setDeleted should only ever appear in the deleteAction method! | |
| 80 void setDeleted() { fDeleted = true; } | |
| 81 }; | |
| 82 | |
| 83 //////////////////////////////////////////////////////////////////////////////// | |
| 84 // Each class derived from GrFakeRefObj should use this macro to add a | |
| 85 // factory creation entry point. This entry point is used by the GrGLDebug | |
| 86 // object to instantiate the various objects | |
| 87 // all globally unique IDs | |
| 88 #define GR_DEFINE_CREATOR(className) \ | |
| 89 public: \ | |
| 90 static GrFakeRefObj *create ## className() { \ | |
| 91 return SkNEW(className); \ | |
| 92 } | |
| 93 | |
| 94 #endif // GrFakeRefObj_DEFINED |
