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1 // Copyright (c) 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 // Inline methods for debug agent class |
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15 // |
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16 |
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17 |
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18 /** |
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19 @file |
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20 @internalComponent |
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21 @released |
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22 */ |
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23 |
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24 #ifndef D_DEBUG_AGENT_INL |
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25 #define D_DEBUG_AGENT_INL |
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26 |
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27 |
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28 /** |
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29 Checks whether the event queue is empty |
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30 */ |
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31 inline TBool DDebugAgent::BufferEmpty() const |
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32 { |
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33 return (NumberOfEmptySlots() == KNumberOfEventsToQueue); |
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34 } |
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35 |
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36 /** |
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37 Checks whether the event queue is full |
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38 */ |
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39 inline TBool DDebugAgent::BufferFull() const |
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40 { |
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41 return (NumberOfEmptySlots() == 0); |
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42 } |
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43 |
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44 /** |
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45 Checks whether there is room in the event queue to store an event |
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46 */ |
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47 inline TBool DDebugAgent::BufferCanStoreEvent() const |
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48 { |
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49 return (NumberOfEmptySlots() > 0); |
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50 } |
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51 |
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52 /** |
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53 This looks to see if the buffer is close to being full and should only |
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54 accept higher priority debug events (user trace is the only low priority event) |
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55 */ |
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56 inline TBool DDebugAgent::BufferAtCriticalLevel() const |
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57 { |
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58 return (NumberOfEmptySlots() < KNumberOfEventsToQueue - KCriticalBufferSize); |
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59 } |
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60 |
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61 /** |
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62 Increments Head position, wrapping at KNumberOfEventsToQueue if necessary |
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63 */ |
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64 inline void DDebugAgent::IncrementHeadPosition(void) |
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65 { |
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66 iHead = (iHead + 1) % KNumberOfEventsToQueue; |
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67 |
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68 iFreeSlots--; |
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69 } |
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70 |
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71 /** |
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72 Increments Tail position, wrapping at KNumberOfEventsToQueue if necessary |
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73 */ |
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74 inline void DDebugAgent::IncrementTailPosition(void) |
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75 { |
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76 iTail = (iTail + 1) % KNumberOfEventsToQueue; |
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77 |
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78 iFreeSlots++; |
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79 } |
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80 |
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81 /** |
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82 Returns the number of free slots in the event queue |
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83 */ |
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84 inline TInt DDebugAgent::NumberOfEmptySlots() const |
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85 { |
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86 return iFreeSlots; |
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87 } |
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88 |
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89 /** |
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90 Lock access to this agent's event queue |
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91 */ |
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92 inline void DDebugAgent::LockEventQueue(void) |
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93 { |
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94 NKern::ThreadEnterCS(); // Waiting on a semaphore is broken but this makes things marginally better. |
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95 // Anyone changing this, bear in mind the CS is also needed for some of the DebugUtils::OpenThreadHandle calls |
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96 Kern::SemaphoreWait(*iEventQueueLock); |
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97 } |
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98 |
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99 /** |
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100 Release the lock on this agent's event queue |
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101 */ |
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102 inline void DDebugAgent::UnlockEventQueue(void) |
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103 { |
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104 Kern::SemaphoreSignal(*iEventQueueLock); |
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105 NKern::ThreadLeaveCS(); |
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106 } |
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107 |
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108 |
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109 #endif // D_DEBUG_AGENT_INL |