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1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // e32\include\nkernsmp\nk_event.h |
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15 // |
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16 // WARNING: This file contains some APIs which are internal and are subject |
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17 // to change without notice. Such APIs should therefore not be used |
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18 // outside the Kernel and Hardware Services package. |
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19 // |
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20 |
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21 #ifndef __NK_EVENT_H__ |
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22 #define __NK_EVENT_H__ |
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23 |
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24 #include <nklib.h> |
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25 |
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26 class NSchedulable; |
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27 class TSpinLock; |
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28 class TDfcQue; |
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29 |
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30 /******************************************** |
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31 * Event handler |
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32 ********************************************/ |
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33 |
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34 /** |
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35 @internalComponent |
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36 |
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37 General event handler callback |
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38 */ |
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39 typedef void (*NEventFn)(TAny*); |
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40 |
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41 /** |
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42 @internalComponent |
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43 |
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44 General event handler structure |
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45 */ |
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46 struct NEventHandler : public SDblQueLink // link into active queue |
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47 { |
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48 inline NEventHandler() |
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49 : iHState(0), iTied(0), iPtr(0), iFn(0) |
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50 { |
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51 iTiedLink.iNext = 0; |
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52 } |
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53 |
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54 enum TEventHandlerType |
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55 { |
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56 EEventHandlerIrq=0xFCu, |
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57 EEventHandlerNTimer=0xFDu, |
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58 EEventHandlerIDFC=0xFEu, |
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59 EEventHandlerDummy=0xFFu, |
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60 }; |
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61 struct N8816 |
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62 { |
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63 TUint8 iHType; |
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64 TUint8 iHState8; |
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65 TUint16 iHState16; |
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66 }; |
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67 struct N8888 |
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68 { |
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69 TUint8 iHType; |
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70 TUint8 iHState0; |
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71 TUint8 iHState1; |
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72 TUint8 iHState2; |
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73 }; |
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74 union |
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75 { |
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76 volatile TUint32 iHState; // state information |
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77 volatile TUint8 iHType; // type of event handler |
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78 volatile N8816 i8816; |
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79 volatile N8888 i8888; |
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80 }; |
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81 union |
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82 { |
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83 NSchedulable* volatile iTied; // pointer to tied thread/group |
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84 TDfcQue* volatile iDfcQ; // doubles as pointer to DFC queue |
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85 }; // since DFCs can't be tied |
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86 TAny* volatile iPtr; // argument to callback |
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87 volatile NEventFn iFn; // callback function |
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88 SDblQueLink iTiedLink; // link to tied/group for cleanup purposes |
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89 |
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90 static TSpinLock TiedLock; // Protects iTied member of all NEventHandlers |
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91 }; |
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92 |
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93 #endif |