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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
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 GrGpuResource_DEFINED | 8 #ifndef GrGpuResource_DEFINED |
9 #define GrGpuResource_DEFINED | 9 #define GrGpuResource_DEFINED |
10 | 10 |
11 #include "GrResourceKey.h" | 11 #include "GrResourceKey.h" |
12 #include "GrTypesPriv.h" | 12 #include "GrTypesPriv.h" |
13 #include "SkData.h" | 13 #include "SkData.h" |
14 #include "SkInstCnt.h" | |
15 | 14 |
16 class GrContext; | 15 class GrContext; |
17 class GrGpu; | 16 class GrGpu; |
18 class GrResourceCache; | 17 class GrResourceCache; |
19 | 18 |
20 /** | 19 /** |
21 * Base class for GrGpuResource. Handles the various types of refs we need. Sepa
rated out as a base | 20 * Base class for GrGpuResource. Handles the various types of refs we need. Sepa
rated out as a base |
22 * class to isolate the ref-cnting behavior and provide friendship without expos
ing all of | 21 * class to isolate the ref-cnting behavior and provide friendship without expos
ing all of |
23 * GrGpuResource. | 22 * GrGpuResource. |
24 * | 23 * |
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39 * the ref cnt to reach zero and the other counts are zero, notifyRefCountIsZero
() will be called | 38 * the ref cnt to reach zero and the other counts are zero, notifyRefCountIsZero
() will be called |
40 * before notifyIsPurgeable(). Moreover, if notifyRefCountIsZero() returns false
then | 39 * before notifyIsPurgeable(). Moreover, if notifyRefCountIsZero() returns false
then |
41 * notifyAllRefCntsAreZero() won't be called at all. notifyRefCountIsZero() must
return false if the | 40 * notifyAllRefCntsAreZero() won't be called at all. notifyRefCountIsZero() must
return false if the |
42 * object may be deleted after notifyRefCntIsZero() returns. | 41 * object may be deleted after notifyRefCntIsZero() returns. |
43 * | 42 * |
44 * GrIORef and GrGpuResource are separate classes for organizational reasons and
to be | 43 * GrIORef and GrGpuResource are separate classes for organizational reasons and
to be |
45 * able to give access via friendship to only the functions related to pending I
O operations. | 44 * able to give access via friendship to only the functions related to pending I
O operations. |
46 */ | 45 */ |
47 template <typename DERIVED> class GrIORef : public SkNoncopyable { | 46 template <typename DERIVED> class GrIORef : public SkNoncopyable { |
48 public: | 47 public: |
49 SK_DECLARE_INST_COUNT(GrIORef) | |
50 | |
51 // Some of the signatures are written to mirror SkRefCnt so that GrGpuResour
ce can work with | 48 // Some of the signatures are written to mirror SkRefCnt so that GrGpuResour
ce can work with |
52 // templated helper classes (e.g. SkAutoTUnref). However, we have different
categories of | 49 // templated helper classes (e.g. SkAutoTUnref). However, we have different
categories of |
53 // refs (e.g. pending reads). We also don't require thread safety as GrCache
able objects are | 50 // refs (e.g. pending reads). We also don't require thread safety as GrCache
able objects are |
54 // not intended to cross thread boundaries. | 51 // not intended to cross thread boundaries. |
55 void ref() const { | 52 void ref() const { |
56 this->validate(); | 53 this->validate(); |
57 ++fRefCnt; | 54 ++fRefCnt; |
58 } | 55 } |
59 | 56 |
60 void unref() const { | 57 void unref() const { |
61 this->validate(); | 58 this->validate(); |
62 | 59 |
63 if (!(--fRefCnt)) { | 60 if (!(--fRefCnt)) { |
64 if (!static_cast<const DERIVED*>(this)->notifyRefCountIsZero()) { | 61 if (!static_cast<const DERIVED*>(this)->notifyRefCountIsZero()) { |
65 return; | 62 return; |
66 } | 63 } |
67 } | 64 } |
68 | 65 |
69 this->didRemoveRefOrPendingIO(kRef_CntType); | 66 this->didRemoveRefOrPendingIO(kRef_CntType); |
70 } | 67 } |
71 | 68 |
72 void validate() const { | 69 void validate() const { |
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134 friend class GrResourceCache; // to check IO ref counts. | 131 friend class GrResourceCache; // to check IO ref counts. |
135 | 132 |
136 template <typename, GrIOType> friend class GrPendingIOResource; | 133 template <typename, GrIOType> friend class GrPendingIOResource; |
137 }; | 134 }; |
138 | 135 |
139 /** | 136 /** |
140 * Base class for objects that can be kept in the GrResourceCache. | 137 * Base class for objects that can be kept in the GrResourceCache. |
141 */ | 138 */ |
142 class SK_API GrGpuResource : public GrIORef<GrGpuResource> { | 139 class SK_API GrGpuResource : public GrIORef<GrGpuResource> { |
143 public: | 140 public: |
144 SK_DECLARE_INST_COUNT(GrGpuResource) | 141 |
145 | 142 |
146 enum LifeCycle { | 143 enum LifeCycle { |
147 /** | 144 /** |
148 * The resource is cached and owned by Skia. Resources with this status
may be kept alive | 145 * The resource is cached and owned by Skia. Resources with this status
may be kept alive |
149 * by the cache as either scratch or unique resources even when there ar
e no refs to them. | 146 * by the cache as either scratch or unique resources even when there ar
e no refs to them. |
150 * The cache may release them whenever there are no refs. | 147 * The cache may release them whenever there are no refs. |
151 */ | 148 */ |
152 kCached_LifeCycle, | 149 kCached_LifeCycle, |
153 | 150 |
154 /** | 151 /** |
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333 LifeCycle fLifeCycle; | 330 LifeCycle fLifeCycle; |
334 const uint32_t fUniqueID; | 331 const uint32_t fUniqueID; |
335 | 332 |
336 SkAutoTUnref<const SkData> fData; | 333 SkAutoTUnref<const SkData> fData; |
337 | 334 |
338 typedef GrIORef<GrGpuResource> INHERITED; | 335 typedef GrIORef<GrGpuResource> INHERITED; |
339 friend class GrIORef<GrGpuResource>; // to access notifyAllCntsAreZero and n
otifyRefCntIsZero. | 336 friend class GrIORef<GrGpuResource>; // to access notifyAllCntsAreZero and n
otifyRefCntIsZero. |
340 }; | 337 }; |
341 | 338 |
342 #endif | 339 #endif |
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