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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 SkTaskGroup_DEFINED | 8 #ifndef SkTaskGroup_DEFINED |
9 #define SkTaskGroup_DEFINED | 9 #define SkTaskGroup_DEFINED |
10 | 10 |
11 #include <functional> | 11 #include <functional> |
12 | 12 |
13 #include "SkTypes.h" | 13 #include "SkTypes.h" |
14 #include "SkAtomics.h" | 14 #include "SkAtomics.h" |
15 #include "SkTemplates.h" | 15 #include "SkTemplates.h" |
16 | 16 |
17 class SkTaskGroup : SkNoncopyable { | 17 class SkTaskGroup : SkNoncopyable { |
18 public: | 18 public: |
19 // Create one of these in main() to enable SkTaskGroups globally. | 19 // Create one of these in main() to enable SkTaskGroups globally. |
20 struct Enabler : SkNoncopyable { | 20 struct Enabler : SkNoncopyable { |
21 explicit Enabler(int threads = -1); // Default is system-reported core
count. | 21 // @param threads Default is system-reported core count. |
| 22 // @param cleanupFn Function to call in each thread that may have |
| 23 // scheduled SkTaskGroup tasks. |
| 24 explicit Enabler(int threads = -1, std::function<void(void)> cleanupFn =
nullptr); |
22 ~Enabler(); | 25 ~Enabler(); |
| 26 private: |
| 27 std::function<void(void)> fCleanupFn; |
23 }; | 28 }; |
24 | 29 |
25 SkTaskGroup(); | 30 SkTaskGroup(); |
26 ~SkTaskGroup() { this->wait(); } | 31 ~SkTaskGroup() { this->wait(); } |
27 | 32 |
28 // Add a task to this SkTaskGroup. It will likely run on another thread. | 33 // Add a task to this SkTaskGroup. It will likely run on another thread. |
29 void add(std::function<void(void)> fn); | 34 void add(std::function<void(void)> fn); |
30 | 35 |
31 // Add a batch of N tasks, all calling fn with different arguments. | 36 // Add a batch of N tasks, all calling fn with different arguments. |
32 void batch(int N, std::function<void(int)> fn); | 37 void batch(int N, std::function<void(int)> fn); |
33 | 38 |
34 // Block until all Tasks previously add()ed to this SkTaskGroup have run. | 39 // Block until all Tasks previously add()ed to this SkTaskGroup have run. |
35 // You may safely reuse this SkTaskGroup after wait() returns. | 40 // You may safely reuse this SkTaskGroup after wait() returns. |
36 void wait(); | 41 void wait(); |
37 | 42 |
38 private: | 43 private: |
39 SkAtomic<int32_t> fPending; | 44 SkAtomic<int32_t> fPending; |
40 }; | 45 }; |
41 | 46 |
42 // Returns best estimate of number of CPU cores available to use. | 47 // Returns best estimate of number of CPU cores available to use. |
43 int sk_num_cores(); | 48 int sk_num_cores(); |
44 | 49 |
45 #endif//SkTaskGroup_DEFINED | 50 #endif//SkTaskGroup_DEFINED |
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