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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 |
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42 kWrite_IOType, | 42 kWrite_IOType, |
43 kRW_IOType | 43 kRW_IOType |
44 }; | 44 }; |
45 | 45 |
46 virtual ~GrIORef(); | 46 virtual ~GrIORef(); |
47 | 47 |
48 // 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 |
49 // 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 |
50 // 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 |
51 // not intended to cross thread boundaries. | 51 // not intended to cross thread boundaries. |
| 52 // internal_dispose() exists because of GrTexture's reliance on it. It will
be removed |
| 53 // soon. |
52 void ref() const { | 54 void ref() const { |
| 55 ++fRefCnt; |
| 56 // pre-validate once internal_dispose is removed (and therefore 0 ref cn
t is not allowed). |
53 this->validate(); | 57 this->validate(); |
54 ++fRefCnt; | |
55 } | 58 } |
56 | 59 |
57 void unref() const { | 60 void unref() const { |
58 this->validate(); | 61 this->validate(); |
59 --fRefCnt; | 62 --fRefCnt; |
60 if (0 == fRefCnt && 0 == fPendingReads && 0 == fPendingWrites) { | 63 if (0 == fRefCnt && 0 == fPendingReads && 0 == fPendingWrites) { |
61 SkDELETE(this); | 64 this->internal_dispose(); |
62 } | 65 } |
63 } | 66 } |
64 | 67 |
65 bool isPurgable() const { return this->reffedOnlyByCache() && !this->interna
lHasPendingIO(); } | 68 virtual void internal_dispose() const { SkDELETE(this); } |
66 bool reffedOnlyByCache() const { return 1 == fRefCnt; } | 69 |
| 70 /** This is exists to service the old mechanism for recycling scratch textur
es. It will |
| 71 be removed soon. */ |
| 72 bool unique() const { return 1 == (fRefCnt + fPendingReads + fPendingWrites)
; } |
67 | 73 |
68 void validate() const { | 74 void validate() const { |
69 #ifdef SK_DEBUG | 75 #ifdef SK_DEBUG |
70 SkASSERT(fRefCnt >= 0); | 76 SkASSERT(fRefCnt >= 0); |
71 SkASSERT(fPendingReads >= 0); | 77 SkASSERT(fPendingReads >= 0); |
72 SkASSERT(fPendingWrites >= 0); | 78 SkASSERT(fPendingWrites >= 0); |
73 SkASSERT(fRefCnt + fPendingReads + fPendingWrites > 0); | 79 SkASSERT(fRefCnt + fPendingReads + fPendingWrites > 0); |
74 #endif | 80 #endif |
75 } | 81 } |
76 | 82 |
| 83 |
77 protected: | 84 protected: |
78 GrIORef() : fRefCnt(1), fPendingReads(0), fPendingWrites(0), fIsScratch(kNo_
IsScratch) { } | 85 GrIORef() : fRefCnt(1), fPendingReads(0), fPendingWrites(0) {} |
79 | 86 |
80 bool internalHasPendingRead() const { return SkToBool(fPendingReads); } | 87 bool internalHasPendingRead() const { return SkToBool(fPendingReads); } |
81 bool internalHasPendingWrite() const { return SkToBool(fPendingWrites); } | 88 bool internalHasPendingWrite() const { return SkToBool(fPendingWrites); } |
82 bool internalHasPendingIO() const { return SkToBool(fPendingWrites | fPendin
gReads); } | 89 bool internalHasPendingIO() const { return SkToBool(fPendingWrites | fPendin
gReads); } |
83 | 90 |
84 private: | 91 private: |
85 void addPendingRead() const { | 92 void addPendingRead() const { |
86 this->validate(); | 93 this->validate(); |
87 ++fPendingReads; | 94 ++fPendingReads; |
88 } | 95 } |
89 | 96 |
90 void completedRead() const { | 97 void completedRead() const { |
91 this->validate(); | 98 this->validate(); |
92 --fPendingReads; | 99 --fPendingReads; |
93 if (0 == fRefCnt && 0 == fPendingReads && 0 == fPendingWrites) { | 100 if (0 == fRefCnt && 0 == fPendingReads && 0 == fPendingWrites) { |
94 SkDELETE(this); | 101 this->internal_dispose(); |
95 } | 102 } |
96 } | 103 } |
97 | 104 |
98 void addPendingWrite() const { | 105 void addPendingWrite() const { |
99 this->validate(); | 106 this->validate(); |
100 ++fPendingWrites; | 107 ++fPendingWrites; |
101 } | 108 } |
102 | 109 |
103 void completedWrite() const { | 110 void completedWrite() const { |
104 this->validate(); | 111 this->validate(); |
105 --fPendingWrites; | 112 --fPendingWrites; |
106 if (0 == fRefCnt && 0 == fPendingReads && 0 == fPendingWrites) { | 113 if (0 == fRefCnt && 0 == fPendingReads && 0 == fPendingWrites) { |
107 SkDELETE(this); | 114 this->internal_dispose(); |
108 } | 115 } |
109 } | 116 } |
110 | 117 |
111 private: | 118 private: |
112 mutable int32_t fRefCnt; | 119 mutable int32_t fRefCnt; |
113 mutable int32_t fPendingReads; | 120 mutable int32_t fPendingReads; |
114 mutable int32_t fPendingWrites; | 121 mutable int32_t fPendingWrites; |
115 | 122 |
116 // This class is used to manage conversion of refs to pending reads/writes. | 123 // This class is used to manage conversion of refs to pending reads/writes. |
117 friend class GrGpuResourceRef; | 124 friend class GrGpuResourceRef; |
118 | |
119 // This is temporary until GrResourceCache is fully replaced by GrResourceCa
che2. | |
120 enum IsScratch { | |
121 kNo_IsScratch, | |
122 kYes_IsScratch | |
123 } fIsScratch; | |
124 | |
125 friend class GrContext; // to set the above field. | |
126 friend class GrResourceCache; // to check the above field. | |
127 friend class GrResourceCache2; // to check the above field. | |
128 | |
129 template <typename, IOType> friend class GrPendingIOResource; | 125 template <typename, IOType> friend class GrPendingIOResource; |
130 }; | 126 }; |
131 | 127 |
132 /** | 128 /** |
133 * Base class for objects that can be kept in the GrResourceCache. | 129 * Base class for objects that can be kept in the GrResourceCache. |
134 */ | 130 */ |
135 class GrGpuResource : public GrIORef { | 131 class GrGpuResource : public GrIORef { |
136 public: | 132 public: |
137 SK_DECLARE_INST_COUNT(GrGpuResource) | 133 SK_DECLARE_INST_COUNT(GrGpuResource) |
138 | 134 |
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254 | 250 |
255 GrResourceCacheEntry* fCacheEntry; // NULL if not in cache | 251 GrResourceCacheEntry* fCacheEntry; // NULL if not in cache |
256 const uint32_t fUniqueID; | 252 const uint32_t fUniqueID; |
257 | 253 |
258 GrResourceKey fScratchKey; | 254 GrResourceKey fScratchKey; |
259 | 255 |
260 typedef GrIORef INHERITED; | 256 typedef GrIORef INHERITED; |
261 }; | 257 }; |
262 | 258 |
263 #endif | 259 #endif |
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