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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 EventDispatchForbiddenScope_h | 5 #ifndef EventDispatchForbiddenScope_h |
| 6 #define EventDispatchForbiddenScope_h | 6 #define EventDispatchForbiddenScope_h |
| 7 | 7 |
| 8 #include "platform/PlatformExport.h" | 8 #include "platform/PlatformExport.h" |
| 9 #include "platform/wtf/Allocator.h" | 9 #include "platform/wtf/Allocator.h" |
| 10 #include "platform/wtf/Assertions.h" | 10 #include "platform/wtf/Assertions.h" |
| 11 #include "platform/wtf/AutoReset.h" | 11 #include "platform/wtf/AutoReset.h" |
| 12 | 12 |
| 13 namespace blink { | 13 namespace blink { |
| 14 | 14 |
| 15 #if DCHECK_IS_ON() | 15 #if DCHECK_IS_ON() |
| 16 | 16 |
| 17 class EventDispatchForbiddenScope { | 17 class EventDispatchForbiddenScope { |
| 18 STACK_ALLOCATED(); | 18 STACK_ALLOCATED(); |
| 19 WTF_MAKE_NONCOPYABLE(EventDispatchForbiddenScope); | 19 WTF_MAKE_NONCOPYABLE(EventDispatchForbiddenScope); |
| 20 | 20 |
| 21 public: | 21 public: |
| 22 EventDispatchForbiddenScope() { | 22 EventDispatchForbiddenScope() { |
| 23 ASSERT(IsMainThread()); | 23 DCHECK(IsMainThread()); |
| 24 ++count_; | 24 ++count_; |
| 25 } | 25 } |
| 26 | 26 |
| 27 ~EventDispatchForbiddenScope() { | 27 ~EventDispatchForbiddenScope() { |
| 28 ASSERT(IsMainThread()); | 28 DCHECK(IsMainThread()); |
| 29 ASSERT(count_); | 29 DCHECK(count_); |
| 30 --count_; | 30 --count_; |
| 31 } | 31 } |
| 32 | 32 |
| 33 static bool IsEventDispatchForbidden() { | 33 static bool IsEventDispatchForbidden() { |
| 34 if (!IsMainThread()) | 34 if (!IsMainThread()) |
| 35 return false; | 35 return false; |
| 36 return count_; | 36 return count_; |
| 37 } | 37 } |
| 38 | 38 |
| 39 class AllowUserAgentEvents { | 39 class AllowUserAgentEvents { |
| 40 STACK_ALLOCATED(); | 40 STACK_ALLOCATED(); |
| 41 | 41 |
| 42 public: | 42 public: |
| 43 AllowUserAgentEvents() : change_(&count_, 0) { ASSERT(IsMainThread()); } | 43 AllowUserAgentEvents() : change_(&count_, 0) { DCHECK(IsMainThread()); } |
| 44 | 44 |
| 45 ~AllowUserAgentEvents() { ASSERT(!count_); } | 45 ~AllowUserAgentEvents() { DCHECK(!count_); } |
| 46 | 46 |
| 47 AutoReset<unsigned> change_; | 47 AutoReset<unsigned> change_; |
| 48 }; | 48 }; |
| 49 | 49 |
| 50 private: | 50 private: |
| 51 PLATFORM_EXPORT static unsigned count_; | 51 PLATFORM_EXPORT static unsigned count_; |
| 52 }; | 52 }; |
| 53 | 53 |
| 54 #else | 54 #else |
| 55 | 55 |
| 56 class EventDispatchForbiddenScope { | 56 class EventDispatchForbiddenScope { |
| 57 STACK_ALLOCATED(); | 57 STACK_ALLOCATED(); |
| 58 WTF_MAKE_NONCOPYABLE(EventDispatchForbiddenScope); | 58 WTF_MAKE_NONCOPYABLE(EventDispatchForbiddenScope); |
| 59 | 59 |
| 60 public: | 60 public: |
| 61 EventDispatchForbiddenScope() {} | 61 EventDispatchForbiddenScope() {} |
| 62 | 62 |
| 63 class AllowUserAgentEvents { | 63 class AllowUserAgentEvents { |
| 64 public: | 64 public: |
| 65 AllowUserAgentEvents() {} | 65 AllowUserAgentEvents() {} |
| 66 }; | 66 }; |
| 67 }; | 67 }; |
| 68 | 68 |
| 69 #endif // DCHECK_IS_ON() | 69 #endif // DCHECK_IS_ON() |
| 70 | 70 |
| 71 } // namespace blink | 71 } // namespace blink |
| 72 | 72 |
| 73 #endif // EventDispatchForbiddenScope_h | 73 #endif // EventDispatchForbiddenScope_h |
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