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1 // Copyright (c) 2002-2009 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 "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 // |
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15 |
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16 #include <ss_std.h> |
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17 #include <es_mbufif.h> |
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18 #include <comms-infras/ss_flowbinders.h> |
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19 |
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20 using namespace ESock; |
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21 |
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22 // the CWaitForMBufs active object class is used to handle an out of mbufs |
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23 // condition during CServProviderBaseMBuf::Write. If a normal allocation fails |
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24 // then one of these AOs is created to wait on mbufs becomign available. |
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25 // |
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26 // when they are, this AO calls CanSend on the socket, which results |
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27 // in Write being called, which should now be able to complete successfully. |
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28 // |
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29 |
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30 |
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31 CWaitForMBufs* CWaitForMBufs::NewL(MSessionDataNotify* aSocket) |
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32 { |
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33 CWaitForMBufs* self = new(ELeave) CWaitForMBufs(aSocket); |
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34 CleanupStack::PushL(self); |
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35 self->ConstructL(); |
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36 CleanupStack::Pop(); |
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37 return self; |
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38 } |
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39 |
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40 CWaitForMBufs::CWaitForMBufs(MSessionDataNotify* aSocket) |
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41 : CActive(0), |
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42 iSocket(aSocket) |
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43 { |
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44 } |
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45 |
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46 void CWaitForMBufs::ConstructL() |
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47 { |
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48 CActiveScheduler::Add(this); |
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49 } |
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50 |
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51 CWaitForMBufs::~CWaitForMBufs() |
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52 { |
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53 Cancel(); |
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54 iMBufChain.Free(); |
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55 } |
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56 |
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57 // from CActive |
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58 void CWaitForMBufs::RunL() |
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59 { |
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60 iMBufChain.Free(); |
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61 if(iSignalCanSend) |
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62 { |
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63 iSignalCanSend = EFalse; //Has to be before because CanSend can re-request |
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64 iSocket->CanSend(); |
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65 } |
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66 if(iSignalNewData) |
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67 { |
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68 iSignalNewData = EFalse; //Has to be before because CanSend can re-request |
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69 iSocket->NewData(0); |
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70 } |
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71 } |
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72 |
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73 void CWaitForMBufs::DoCancel() |
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74 { |
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75 iSignalNewData = EFalse; |
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76 iSignalCanSend = EFalse; |
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77 iRequest.Cancel(); |
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78 } |
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79 |
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80 // requests |
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81 |
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82 void CWaitForMBufs::CancelNewData() |
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83 { |
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84 iSignalNewData = EFalse; |
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85 if (!iSignalNewData && !iSignalCanSend) |
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86 { |
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87 iRequest.Cancel(); |
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88 } |
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89 } |
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90 |
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91 void CWaitForMBufs::CancelCanSend() |
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92 { |
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93 iSignalCanSend = EFalse; |
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94 if (!iSignalNewData && !iSignalCanSend) |
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95 { |
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96 iRequest.Cancel(); |
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97 } |
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98 } |
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99 |
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100 void CWaitForMBufs::AllocWaitAndSignalNewData(TUint aSize) |
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101 |
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102 { |
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103 if(!IsActive()) |
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104 { |
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105 iRequest.Alloc(iMBufChain, aSize, iStatus); |
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106 SetActive(); |
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107 } |
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108 iSignalNewData = ETrue; |
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109 } |
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110 |
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111 void CWaitForMBufs::AllocWaitAndSignalCanSend(TUint aSize) |
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112 { |
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113 if(!IsActive()) |
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114 { |
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115 iRequest.Alloc(iMBufChain, aSize, iStatus); |
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116 SetActive(); |
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117 } |
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118 iSignalCanSend = ETrue; |
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119 } |
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120 |