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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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1882 | 1882 |
1883 SetUpFunction(); | 1883 SetUpFunction(); |
1884 | 1884 |
1885 | 1885 |
1886 //---------------------------------------------------------------------------- | 1886 //---------------------------------------------------------------------------- |
1887 | 1887 |
1888 // TODO(rossberg): very simple abstraction for generic microtask queue. | 1888 // TODO(rossberg): very simple abstraction for generic microtask queue. |
1889 // Eventually, we should move to a real event queue that allows to maintain | 1889 // Eventually, we should move to a real event queue that allows to maintain |
1890 // relative ordering of different kinds of tasks. | 1890 // relative ordering of different kinds of tasks. |
1891 | 1891 |
1892 RunMicrotasks.runners = new InternalArray; | 1892 function GetMicrotaskQueue() { |
| 1893 var microtaskState = %GetMicrotaskState(); |
| 1894 if (IS_UNDEFINED(microtaskState.queue)) { |
| 1895 microtaskState.queue = new InternalArray; |
| 1896 } |
| 1897 return microtaskState.queue; |
| 1898 } |
1893 | 1899 |
1894 function RunMicrotasks() { | 1900 function RunMicrotasks() { |
1895 while (%SetMicrotaskPending(false)) { | 1901 while (%SetMicrotaskPending(false)) { |
1896 for (var i in RunMicrotasks.runners) RunMicrotasks.runners[i](); | 1902 var microtaskState = %GetMicrotaskState(); |
| 1903 if (IS_UNDEFINED(microtaskState.queue)) |
| 1904 return; |
| 1905 |
| 1906 var microtasks = microtaskState.queue; |
| 1907 microtaskState.queue = new InternalArray; |
| 1908 |
| 1909 for (var i = 0; i < microtasks.length; i++) { |
| 1910 microtasks[i](); |
| 1911 } |
1897 } | 1912 } |
1898 } | 1913 } |
| 1914 |
| 1915 function EnqueueExternalMicrotask(fn) { |
| 1916 GetMicrotaskQueue().push(fn); |
| 1917 %SetMicrotaskPending(true); |
| 1918 } |
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