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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
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2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
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3 /* This Source Code Form is subject to the terms of the Mozilla Public |
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4 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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6 |
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7 #include "nsISupports.idl" |
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8 |
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9 interface nsIRunnable; |
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10 |
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11 [scriptable, uuid(4e8febe4-6631-49dc-8ac9-308c1cb9b09c)] |
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12 interface nsIEventTarget : nsISupports |
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13 { |
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14 /** |
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15 * Dispatch an event to this event target. This function may be called from |
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16 * any thread, and it may be called re-entrantly. |
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17 * |
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18 * @param event |
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19 * The event to dispatch. |
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20 * @param flags |
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21 * The flags modifying event dispatch. The flags are described in detail |
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22 * below. |
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23 * |
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24 * @throws NS_ERROR_INVALID_ARG |
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25 * Indicates that event is null. |
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26 * @throws NS_ERROR_UNEXPECTED |
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27 * Indicates that the thread is shutting down and has finished processing |
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28 * events, so this event would never run and has not been dispatched. |
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29 */ |
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30 void dispatch(in nsIRunnable event, in unsigned long flags); |
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31 |
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32 /** |
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33 * This flag specifies the default mode of event dispatch, whereby the event |
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34 * is simply queued for later processing. When this flag is specified, |
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35 * dispatch returns immediately after the event is queued. |
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36 */ |
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37 const unsigned long DISPATCH_NORMAL = 0; |
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38 |
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39 /** |
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40 * This flag specifies the synchronous mode of event dispatch, in which the |
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41 * dispatch method does not return until the event has been processed. |
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42 * |
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43 * NOTE: passing this flag to dispatch may have the side-effect of causing |
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44 * other events on the current thread to be processed while waiting for the |
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45 * given event to be processed. |
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46 */ |
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47 const unsigned long DISPATCH_SYNC = 1; |
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48 |
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49 /** |
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50 * Check to see if this event target is associated with the current thread. |
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51 * |
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52 * @returns |
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53 * A boolean value that if "true" indicates that events dispatched to this |
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54 * event target will run on the current thread (i.e., the thread calling |
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55 * this method). |
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56 */ |
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57 boolean isOnCurrentThread(); |
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58 }; |
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59 |
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60 %{C++ |
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61 // convenient aliases: |
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62 #define NS_DISPATCH_NORMAL nsIEventTarget::DISPATCH_NORMAL |
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63 #define NS_DISPATCH_SYNC nsIEventTarget::DISPATCH_SYNC |
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64 %} |