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1 /* | 1 /* |
2 * Copyright 2010 Google Inc. | 2 * Copyright 2010 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 SkGlyphCache_Globals_DEFINED | 8 #ifndef SkGlyphCache_Globals_DEFINED |
9 #define SkGlyphCache_Globals_DEFINED | 9 #define SkGlyphCache_Globals_DEFINED |
10 | 10 |
11 #include "SkGlyphCache.h" | 11 #include "SkGlyphCache.h" |
12 #include "SkMutex.h" | 12 #include "SkMutex.h" |
13 #include "SkSpinlock.h" | 13 #include "SkSpinlock.h" |
14 #include "SkTLS.h" | 14 #include "SkTLS.h" |
15 | 15 |
16 #ifndef SK_DEFAULT_FONT_CACHE_COUNT_LIMIT | 16 #ifndef SK_DEFAULT_FONT_CACHE_COUNT_LIMIT |
17 #define SK_DEFAULT_FONT_CACHE_COUNT_LIMIT 2048 | 17 #define SK_DEFAULT_FONT_CACHE_COUNT_LIMIT 2048 |
18 #endif | 18 #endif |
19 | 19 |
20 #ifndef SK_DEFAULT_FONT_CACHE_LIMIT | 20 #ifndef SK_DEFAULT_FONT_CACHE_LIMIT |
21 #define SK_DEFAULT_FONT_CACHE_LIMIT (2 * 1024 * 1024) | 21 #define SK_DEFAULT_FONT_CACHE_LIMIT (2 * 1024 * 1024) |
22 #endif | 22 #endif |
23 | 23 |
24 /////////////////////////////////////////////////////////////////////////////// | 24 /////////////////////////////////////////////////////////////////////////////// |
25 | 25 |
26 class SkGlyphCache_Globals { | 26 class SkGlyphCache_Globals { |
27 public: | 27 public: |
28 SkGlyphCache_Globals() { | 28 SkGlyphCache_Globals() { |
29 | |
30 fHead = nullptr; | 29 fHead = nullptr; |
31 fTotalMemoryUsed.store(0); | 30 fTotalMemoryUsed = 0; |
32 fCacheSizeLimit = SK_DEFAULT_FONT_CACHE_LIMIT; | 31 fCacheSizeLimit = SK_DEFAULT_FONT_CACHE_LIMIT; |
33 fCacheCount = 0; | 32 fCacheCount = 0; |
34 fCacheCountLimit = SK_DEFAULT_FONT_CACHE_COUNT_LIMIT; | 33 fCacheCountLimit = SK_DEFAULT_FONT_CACHE_COUNT_LIMIT; |
35 } | 34 } |
36 | 35 |
37 ~SkGlyphCache_Globals() { | 36 ~SkGlyphCache_Globals() { |
38 SkGlyphCache* cache = fHead; | 37 SkGlyphCache* cache = fHead; |
39 while (cache) { | 38 while (cache) { |
40 SkGlyphCache* next = cache->fNext; | 39 SkGlyphCache* next = cache->fNext; |
41 delete cache; | 40 delete cache; |
42 cache = next; | 41 cache = next; |
43 } | 42 } |
44 } | 43 } |
45 | 44 |
46 SkSpinlock fLock; | 45 SkSpinlock fLock; |
47 | 46 |
48 SkGlyphCache* internalGetHead() const { return fHead; } | 47 SkGlyphCache* internalGetHead() const { return fHead; } |
49 SkGlyphCache* internalGetTail() const; | 48 SkGlyphCache* internalGetTail() const; |
50 | 49 |
51 size_t getTotalMemoryUsed() const { return fTotalMemoryUsed.load(); } | 50 size_t getTotalMemoryUsed() const { return fTotalMemoryUsed; } |
52 void increaseTotalMemoryUsed(size_t increase) { fTotalMemoryUsed.fetch_add(i
ncrease);} | |
53 int getCacheCountUsed() const { return fCacheCount; } | 51 int getCacheCountUsed() const { return fCacheCount; } |
54 | 52 |
55 #ifdef SK_DEBUG | 53 #ifdef SK_DEBUG |
56 void validate() const; | 54 void validate() const; |
57 #else | 55 #else |
58 void validate() const {} | 56 void validate() const {} |
59 #endif | 57 #endif |
60 | 58 |
61 int getCacheCountLimit() const { return fCacheCountLimit; } | 59 int getCacheCountLimit() const { return fCacheCountLimit; } |
62 int setCacheCountLimit(int limit); | 60 int setCacheCountLimit(int limit); |
63 | 61 |
64 size_t getCacheSizeLimit() const { return fCacheSizeLimit; } | 62 size_t getCacheSizeLimit() const { return fCacheSizeLimit; } |
65 size_t setCacheSizeLimit(size_t limit); | 63 size_t setCacheSizeLimit(size_t limit); |
66 | 64 |
67 // returns true if this cache is over-budget either due to size limit | 65 // returns true if this cache is over-budget either due to size limit |
68 // or count limit. | 66 // or count limit. |
69 bool isOverBudget() const { | 67 bool isOverBudget() const { |
70 return fCacheCount > fCacheCountLimit || | 68 return fCacheCount > fCacheCountLimit || |
71 fTotalMemoryUsed.load() > fCacheSizeLimit; | 69 fTotalMemoryUsed > fCacheSizeLimit; |
72 } | 70 } |
73 | 71 |
74 void purgeAll(); // does not change budget | 72 void purgeAll(); // does not change budget |
75 | 73 |
76 // call when a glyphcache is available for caching (i.e. not in use) | 74 // call when a glyphcache is available for caching (i.e. not in use) |
77 void attachCacheToHead(SkGlyphCache*); | 75 void attachCacheToHead(SkGlyphCache*); |
78 | 76 |
79 // can only be called when the mutex is already held | 77 // can only be called when the mutex is already held |
80 void internalMoveToHead(SkGlyphCache *); | 78 void internalDetachCache(SkGlyphCache*); |
| 79 void internalAttachCacheToHead(SkGlyphCache*); |
| 80 |
| 81 private: |
| 82 SkGlyphCache* fHead; |
| 83 size_t fTotalMemoryUsed; |
| 84 size_t fCacheSizeLimit; |
| 85 int32_t fCacheCountLimit; |
| 86 int32_t fCacheCount; |
81 | 87 |
82 // Checkout budgets, modulated by the specified min-bytes-needed-to-purge, | 88 // Checkout budgets, modulated by the specified min-bytes-needed-to-purge, |
83 // and attempt to purge caches to match. | 89 // and attempt to purge caches to match. |
84 // Returns number of bytes freed. | 90 // Returns number of bytes freed. |
85 void internalDetachCache(SkGlyphCache* cache); | |
86 size_t internalPurge(size_t minBytesNeeded = 0); | 91 size_t internalPurge(size_t minBytesNeeded = 0); |
87 | |
88 private: | |
89 SkGlyphCache* fHead; | |
90 SkAtomic<size_t> fTotalMemoryUsed; | |
91 size_t fCacheSizeLimit; | |
92 int32_t fCacheCountLimit; | |
93 int32_t fCacheCount; | |
94 | |
95 }; | 92 }; |
96 | 93 |
97 #endif | 94 #endif |
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