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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CC_RATE_LIMITER_H_ | 5 #ifndef CC_RATE_LIMITER_H_ |
6 #define CC_RATE_LIMITER_H_ | 6 #define CC_RATE_LIMITER_H_ |
7 | 7 |
8 #include "base/memory/ref_counted.h" | 8 #include "base/memory/ref_counted.h" |
9 | 9 |
10 namespace WebKit { | 10 namespace WebKit { |
11 class WebGraphicsContext3D; | 11 class WebGraphicsContext3D; |
12 } | 12 } |
13 | 13 |
14 namespace cc { | 14 namespace cc { |
15 | 15 |
| 16 class Thread; |
| 17 |
16 class RateLimiterClient { | 18 class RateLimiterClient { |
17 public: | 19 public: |
18 virtual void rateLimit() = 0; | 20 virtual void rateLimit() = 0; |
19 }; | 21 }; |
20 | 22 |
21 // A RateLimiter can be used to make sure that a single context does not dominat
e all execution time. | 23 // A RateLimiter can be used to make sure that a single context does not dominat
e all execution time. |
22 // To use, construct a RateLimiter class around the context and call start() whe
never calls are made on the | 24 // To use, construct a RateLimiter class around the context and call start() whe
never calls are made on the |
23 // context outside of normal flow control. RateLimiter will block if the context
is too far ahead of the | 25 // context outside of normal flow control. RateLimiter will block if the context
is too far ahead of the |
24 // compositor. | 26 // compositor. |
25 class RateLimiter : public base::RefCounted<RateLimiter> { | 27 class RateLimiter : public base::RefCounted<RateLimiter> { |
26 public: | 28 public: |
27 static scoped_refptr<RateLimiter> create(WebKit::WebGraphicsContext3D*, Rate
LimiterClient*); | 29 static scoped_refptr<RateLimiter> create(WebKit::WebGraphicsContext3D*, Rate
LimiterClient*, Thread*); |
28 | 30 |
29 void start(); | 31 void start(); |
30 | 32 |
31 // Context and client will not be accessed after stop(). | 33 // Context and client will not be accessed after stop(). |
32 void stop(); | 34 void stop(); |
33 | 35 |
34 private: | 36 private: |
35 RateLimiter(WebKit::WebGraphicsContext3D*, RateLimiterClient*); | 37 RateLimiter(WebKit::WebGraphicsContext3D*, RateLimiterClient*, Thread*); |
36 ~RateLimiter(); | 38 ~RateLimiter(); |
37 friend class base::RefCounted<RateLimiter>; | 39 friend class base::RefCounted<RateLimiter>; |
38 | 40 |
39 class Task; | 41 class Task; |
40 friend class Task; | 42 friend class Task; |
41 void rateLimitContext(); | 43 void rateLimitContext(); |
42 | 44 |
43 WebKit::WebGraphicsContext3D* m_context; | 45 WebKit::WebGraphicsContext3D* m_context; |
44 bool m_active; | 46 bool m_active; |
45 RateLimiterClient *m_client; | 47 RateLimiterClient *m_client; |
| 48 Thread* m_thread; |
46 }; | 49 }; |
47 | 50 |
48 } | 51 } |
49 #endif // CC_RATE_LIMITER_H_ | 52 #endif // CC_RATE_LIMITER_H_ |
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