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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * | 7 * |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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42 // C++ calls into script contexts which are "owned" by blink (created in a | 42 // C++ calls into script contexts which are "owned" by blink (created in a |
43 // process where WebKit.cpp initializes v8) must declare their type: | 43 // process where WebKit.cpp initializes v8) must declare their type: |
44 // | 44 // |
45 // 1. Calls into page/author script from a frame | 45 // 1. Calls into page/author script from a frame |
46 // 2. Calls into page/author script from a worker | 46 // 2. Calls into page/author script from a worker |
47 // 3. Calls into internal script (typically setup/teardown work) | 47 // 3. Calls into internal script (typically setup/teardown work) |
48 // | 48 // |
49 // Debug-time checking of this is enforced via v8::MicrotasksScope. | 49 // Debug-time checking of this is enforced via v8::MicrotasksScope. |
50 // | 50 // |
51 // Calls of type (1) should generally go through ScriptController, as inspector | 51 // Calls of type (1) should generally go through ScriptController, as inspector |
52 // instrumentation is needed. ScriptController allocates V8RecursionScope for yo
u. | 52 // instrumentation is needed. ScriptController allocates V8RecursionScope for |
| 53 // you. |
53 // | 54 // |
54 // Calls of type (2) should always stack-allocate a v8::MicrotasksScope(kRunMicr
toasks) | 55 // Calls of type (2) should always stack-allocate a |
55 // in the same block as the call into script. | 56 // v8::MicrotasksScope(kRunMicrtoasks) in the same block as the call into |
| 57 // script. |
56 // | 58 // |
57 // Calls of type (3) should stack allocate a v8::MicrotasksScope(kDoNotRunMicrot
asks) -- | 59 // Calls of type (3) should stack allocate a |
58 // this skips work that is spec'd to happen at the end of the outer-most | 60 // v8::MicrotasksScope(kDoNotRunMicrotasks) -- this skips work that is spec'd to |
59 // script stack frame of calls into page script: | 61 // happen at the end of the outer-most script stack frame of calls into page |
| 62 // script: |
60 // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkp
oint | 63 // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkp
oint |
61 class CORE_EXPORT Microtask { | 64 class CORE_EXPORT Microtask { |
62 STATIC_ONLY(Microtask); | 65 STATIC_ONLY(Microtask); |
63 | 66 |
64 public: | 67 public: |
65 static void performCheckpoint(v8::Isolate*); | 68 static void performCheckpoint(v8::Isolate*); |
66 | 69 |
67 // TODO(jochen): Make all microtasks pass in the ScriptState they want to be | 70 // TODO(jochen): Make all microtasks pass in the ScriptState they want to be |
68 // executed in. Until then, all microtasks have to keep track of their | 71 // executed in. Until then, all microtasks have to keep track of their |
69 // ScriptState themselves. | 72 // ScriptState themselves. |
70 static void enqueueMicrotask(std::unique_ptr<WTF::Closure>); | 73 static void enqueueMicrotask(std::unique_ptr<WTF::Closure>); |
71 }; | 74 }; |
72 | 75 |
73 } // namespace blink | 76 } // namespace blink |
74 | 77 |
75 #endif // Microtask_h | 78 #endif // Microtask_h |
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