usbengines/usbotgwatcher/src/cusbbusactivityobserver.cpp
changeset 34 7858bc6ead78
parent 31 dfdd8240f7c8
child 35 9d8b04ca6939
equal deleted inserted replaced
31:dfdd8240f7c8 34:7858bc6ead78
     1 /*
       
     2  * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
       
     3  * All rights reserved.
       
     4  * This component and the accompanying materials are made available
       
     5  * under the terms of "Eclipse Public License v1.0"
       
     6  * which accompanies this distribution, and is available
       
     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8  *
       
     9  * Initial Contributors:
       
    10  * Nokia Corporation - initial contribution.
       
    11  *
       
    12  * Contributors:
       
    13  *
       
    14  * Description:  Implementation
       
    15  *
       
    16  */
       
    17 
       
    18 #include <usbotgdefs.h>
       
    19 
       
    20 #include "cusbbusactivityobserver.h"
       
    21 
       
    22 #include "definitions.h"
       
    23 #include "debug.h"
       
    24 #include "panic.h"
       
    25 
       
    26 // ---------------------------------------------------------------------------
       
    27 // 
       
    28 // ---------------------------------------------------------------------------
       
    29 //
       
    30 CUsbBusActivityObserver::CUsbBusActivityObserver() :
       
    31     CActive(EPriorityStandard)
       
    32     {
       
    33     CActiveScheduler::Add(this);
       
    34     }
       
    35 
       
    36 // ---------------------------------------------------------------------------
       
    37 // 
       
    38 // ---------------------------------------------------------------------------
       
    39 //
       
    40 void CUsbBusActivityObserver::ConstructL()
       
    41     {
       
    42     LOG_FUNC
       
    43 
       
    44     LEAVEIFERROR(iBusActivity.Attach(KUidUsbManCategory,
       
    45             KUsbOtgConnectionIdleProperty));
       
    46 
       
    47     }
       
    48 
       
    49 // ---------------------------------------------------------------------------
       
    50 // 
       
    51 // ---------------------------------------------------------------------------
       
    52 //
       
    53 CUsbBusActivityObserver* CUsbBusActivityObserver::NewL()
       
    54     {
       
    55     LOG_FUNC
       
    56 
       
    57     CUsbBusActivityObserver* self = new (ELeave) CUsbBusActivityObserver();
       
    58     CleanupStack::PushL(self);
       
    59     self->ConstructL();
       
    60     CleanupStack::Pop(self);
       
    61     return self;
       
    62     }
       
    63 
       
    64 // ---------------------------------------------------------------------------
       
    65 // 
       
    66 // ---------------------------------------------------------------------------
       
    67 //
       
    68 CUsbBusActivityObserver::~CUsbBusActivityObserver()
       
    69 
       
    70     {
       
    71     LOG_FUNC
       
    72 
       
    73     Cancel();
       
    74 
       
    75     iBusActivity.Close();
       
    76 
       
    77     iObservers.Close();
       
    78 
       
    79     }
       
    80 
       
    81 // ---------------------------------------------------------------------------
       
    82 // 
       
    83 // ---------------------------------------------------------------------------
       
    84 //
       
    85 CUsbBusActivityObserver::TBusActivity CUsbBusActivityObserver::BusActivity()
       
    86     {
       
    87 
       
    88     TInt val(0);
       
    89 
       
    90     TInt err = iBusActivity.Get(val);
       
    91 
       
    92     if (KErrNone != err)
       
    93         {
       
    94         LOG("ECanNotGetBusActivityProperty" );
       
    95         PANIC( ECanNotGetBusActivityProperty);
       
    96         }
       
    97 
       
    98     return (0 == val ? EBusActive : EBusIdle);
       
    99 
       
   100     }
       
   101 
       
   102 // ---------------------------------------------------------------------------
       
   103 // 
       
   104 // ---------------------------------------------------------------------------
       
   105 //
       
   106 void CUsbBusActivityObserver::SubscribeL(MUsbBusActivityObserver& aObserver)
       
   107     {
       
   108     LOG_FUNC
       
   109 
       
   110     // check if the same observer already exist in a list
       
   111     if (KErrNotFound != iObservers.Find(&aObserver))
       
   112         {
       
   113         LOG( "Observer already exists" );
       
   114         PANIC( EObserverAlreadyExists);
       
   115         return;
       
   116         }
       
   117     iObservers.AppendL(&aObserver);
       
   118 
       
   119     if (KFirst == iObservers.Count()) // first item
       
   120         {
       
   121         iBusActivity.Subscribe(iStatus);
       
   122         SetActive();
       
   123 
       
   124         }
       
   125     }
       
   126 
       
   127 // ---------------------------------------------------------------------------
       
   128 // 
       
   129 // ---------------------------------------------------------------------------
       
   130 //
       
   131 void CUsbBusActivityObserver::UnsubscribeL(MUsbBusActivityObserver& aObserver)
       
   132     {
       
   133     LOG_FUNC
       
   134 
       
   135     TInt i(iObservers.Find(&aObserver));
       
   136     if (KErrNotFound == i)
       
   137         {
       
   138         LOG( "Observer not found" );
       
   139         PANIC( ECanNotFindBusActivityObserver);
       
   140         return;
       
   141         }
       
   142 
       
   143     iObservers.Remove(i);
       
   144 
       
   145     if (0 == iObservers.Count()) // no observers anymore
       
   146         {
       
   147         // cancel pending request
       
   148         Cancel();
       
   149         }
       
   150     }
       
   151 
       
   152 // ---------------------------------------------------------------------------
       
   153 
       
   154 // ---------------------------------------------------------------------------
       
   155 //
       
   156 void CUsbBusActivityObserver::RunL()
       
   157     {
       
   158     LOG_FUNC
       
   159 
       
   160     LOG1( "iStatus = %d" , iStatus.Int());
       
   161 
       
   162     // if error occured, inform observers
       
   163     if (KErrNone != iStatus.Int())
       
   164         {
       
   165         for (TInt i(0); i < iObservers.Count(); ++i)
       
   166             {
       
   167             iObservers[i]->BusActivityErrorL(iStatus.Int());
       
   168             }
       
   169         }
       
   170 
       
   171     // re-issue request first
       
   172     iBusActivity.Subscribe(iStatus);
       
   173     SetActive();
       
   174 
       
   175     // then process property change
       
   176     TBusActivity state(BusActivity());
       
   177 
       
   178     switch (state)
       
   179         {
       
   180         case EBusIdle:
       
   181             {
       
   182             LOG("BusIdle");
       
   183 
       
   184             for (TInt i(0); i < iObservers.Count(); ++i)
       
   185                 {
       
   186                 iObservers[i]->BusIdleL();
       
   187                 }
       
   188             break;
       
   189             }
       
   190 
       
   191         case EBusActive:
       
   192             {
       
   193             LOG("BusActive");
       
   194 
       
   195             for (TInt i(0); i < iObservers.Count(); ++i)
       
   196                 {
       
   197                 iObservers[i]->BusActiveL();
       
   198                 }
       
   199             break;
       
   200             }
       
   201 
       
   202         default:
       
   203             {
       
   204             LOG("WrongBusState" );
       
   205             PANIC( EWrongBusState);
       
   206             }
       
   207         }
       
   208 
       
   209     }
       
   210 
       
   211 // ---------------------------------------------------------------------------
       
   212 // 
       
   213 // ---------------------------------------------------------------------------
       
   214 //
       
   215 void CUsbBusActivityObserver::DoCancel()
       
   216     {
       
   217     iBusActivity.Cancel();
       
   218     }
       
   219 
       
   220 // ---------------------------------------------------------------------------
       
   221 // 
       
   222 // ---------------------------------------------------------------------------
       
   223 //
       
   224 TInt CUsbBusActivityObserver::RunError(TInt aError)
       
   225     {
       
   226     LOG_FUNC
       
   227 
       
   228     LOG1( "aError = %d", aError );
       
   229 
       
   230     // try to continue	
       
   231     return KErrNone;
       
   232 
       
   233     }
       
   234