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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 MEDIA_BASE_CALLBACK_HOLDER_H_ | 5 #ifndef MEDIA_BASE_CALLBACK_HOLDER_H_ |
6 #define MEDIA_BASE_CALLBACK_HOLDER_H_ | 6 #define MEDIA_BASE_CALLBACK_HOLDER_H_ |
7 | 7 |
8 #include "base/bind.h" | 8 #include "base/bind.h" |
| 9 #include "base/bind_to_current_loop.h" |
9 #include "base/callback.h" | 10 #include "base/callback.h" |
10 #include "base/callback_helpers.h" | 11 #include "base/callback_helpers.h" |
11 #include "media/base/bind_to_current_loop.h" | |
12 | 12 |
13 namespace media { | 13 namespace media { |
14 | 14 |
15 // A helper class that can hold a callback from being fired. | 15 // A helper class that can hold a callback from being fired. |
16 template <typename CB> class CallbackHolder { | 16 template <typename CB> class CallbackHolder { |
17 public: | 17 public: |
18 CallbackHolder() : hold_(false) {} | 18 CallbackHolder() : hold_(false) {} |
19 | 19 |
20 ~CallbackHolder() { | 20 ~CallbackHolder() { |
21 // Make sure all callbacks are satisfied! | 21 // Make sure all callbacks are satisfied! |
(...skipping 23 matching lines...) Expand all Loading... |
45 if (hold_) | 45 if (hold_) |
46 held_cb_ = base::ResetAndReturn(&original_cb_); | 46 held_cb_ = base::ResetAndReturn(&original_cb_); |
47 else | 47 else |
48 base::ResetAndReturn(&original_cb_).Run(); | 48 base::ResetAndReturn(&original_cb_).Run(); |
49 } | 49 } |
50 | 50 |
51 template <typename A1> void RunOrHold(A1 a1) { | 51 template <typename A1> void RunOrHold(A1 a1) { |
52 DCHECK(held_cb_.is_null()); | 52 DCHECK(held_cb_.is_null()); |
53 if (hold_) { | 53 if (hold_) { |
54 held_cb_ = base::Bind(base::ResetAndReturn(&original_cb_), | 54 held_cb_ = base::Bind(base::ResetAndReturn(&original_cb_), |
55 internal::TrampolineForward(a1)); | 55 base::internal::TrampolineForward(a1)); |
56 } else { | 56 } else { |
57 base::ResetAndReturn(&original_cb_).Run(a1); | 57 base::ResetAndReturn(&original_cb_).Run(a1); |
58 } | 58 } |
59 } | 59 } |
60 | 60 |
61 template <typename A1, typename A2> void RunOrHold(A1 a1, A2 a2) { | 61 template <typename A1, typename A2> void RunOrHold(A1 a1, A2 a2) { |
62 DCHECK(held_cb_.is_null()); | 62 DCHECK(held_cb_.is_null()); |
63 if (hold_) { | 63 if (hold_) { |
64 held_cb_ = base::Bind(base::ResetAndReturn(&original_cb_), | 64 held_cb_ = base::Bind(base::ResetAndReturn(&original_cb_), |
65 internal::TrampolineForward(a1), | 65 base::internal::TrampolineForward(a1), |
66 internal::TrampolineForward(a2)); | 66 base::internal::TrampolineForward(a2)); |
67 } else { | 67 } else { |
68 base::ResetAndReturn(&original_cb_).Run(a1, a2); | 68 base::ResetAndReturn(&original_cb_).Run(a1, a2); |
69 } | 69 } |
70 } | 70 } |
71 | 71 |
72 // Releases and runs the held callback. | 72 // Releases and runs the held callback. |
73 void RunHeldCallback() { | 73 void RunHeldCallback() { |
74 DCHECK(hold_); | 74 DCHECK(hold_); |
75 DCHECK(!held_cb_.is_null()); | 75 DCHECK(!held_cb_.is_null()); |
76 hold_ = false; | 76 hold_ = false; |
77 base::ResetAndReturn(&held_cb_).Run(); | 77 base::ResetAndReturn(&held_cb_).Run(); |
78 } | 78 } |
79 | 79 |
80 private: | 80 private: |
81 bool hold_; | 81 bool hold_; |
82 CB original_cb_; | 82 CB original_cb_; |
83 base::Closure held_cb_; | 83 base::Closure held_cb_; |
84 }; | 84 }; |
85 | 85 |
86 } // namespace media | 86 } // namespace media |
87 | 87 |
88 #endif // MEDIA_BASE_CALLBACK_HOLDER_H_ | 88 #endif // MEDIA_BASE_CALLBACK_HOLDER_H_ |
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