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11 <h1>examples/Base/IPC/AdvancedClientServerExample/ThreadClient/src/threadclient.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).</span> |
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12 <a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span> |
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13 <a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span> |
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14 <a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span> |
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15 <a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span> |
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16 <a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span> |
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17 <a name="l00007"></a>00007 <span class="comment">//</span> |
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18 <a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span> |
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19 <a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span> |
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20 <a name="l00010"></a>00010 <span class="comment">//</span> |
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21 <a name="l00011"></a>00011 <span class="comment">// Contributors:</span> |
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22 <a name="l00012"></a>00012 <span class="comment">//</span> |
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23 <a name="l00013"></a>00013 <span class="comment">// Description:</span> |
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24 <a name="l00014"></a>00014 <span class="comment">//</span> |
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25 <a name="l00015"></a>00015 |
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26 <a name="l00016"></a>00016 <span class="preprocessor">#include "threadclient.h"</span> |
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27 <a name="l00017"></a>00017 <span class="preprocessor">#include "threadserver.h"</span> |
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28 <a name="l00018"></a>00018 <span class="preprocessor">#include "threadclientserver.h"</span> |
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29 <a name="l00019"></a>00019 <span class="preprocessor">#include<e32debug.h></span> |
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30 <a name="l00020"></a>00020 |
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31 <a name="l00021"></a>00021 <span class="preprocessor">#define KMaxServerNameLength 256</span> |
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32 <a name="l00022"></a>00022 <span class="preprocessor"></span> |
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33 <a name="l00023"></a>00023 <span class="keyword">static</span> <span class="keyword">const</span> TUid KUidThreadServer = {0x10283039}; <span class="comment">// Thread Server UID</span> |
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34 <a name="l00024"></a>00024 <span class="keyword">const</span> TInt KCreateSessionRetryCount = 2; <span class="comment">//CreateSession retry count</span> |
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35 <a name="l00025"></a>00025 <span class="keyword">const</span> TInt KServerDefaultMessageSlots = 2; <span class="comment">//default async message slots</span> |
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36 <a name="l00026"></a>00026 |
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37 <a name="l00033"></a>00033 <span class="keyword">static</span> TInt StartServer() |
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38 <a name="l00034"></a>00034 { |
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39 <a name="l00035"></a>00035 <span class="keyword">const</span> TUidType serverUid(KNullUid,KNullUid,KUidThreadServer); |
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40 <a name="l00036"></a>00036 TThreadFunction serverFunc = <a class="code" href="class_c_thread_server.html#acdab1f08c0f860dd83ccacbf26eeaced">CThreadServer::StartThread</a>; |
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41 <a name="l00037"></a>00037 RThread server; |
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42 <a name="l00038"></a>00038 |
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43 <a name="l00039"></a>00039 <span class="comment">//create a new thread</span> |
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44 <a name="l00040"></a>00040 TInt r = server.Create(_L(<span class="stringliteral">""</span>), serverFunc, KThreadServerStackSize, |
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45 <a name="l00041"></a>00041 #ifdef SYMBIAN_USE_SEPARATE_HEAPS |
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46 <a name="l00042"></a>00042 KThreadServerInitHeapSize, KThreadServerMaxHeapSize, |
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47 <a name="l00043"></a>00043 #<span class="keywordflow">else</span> |
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48 <a name="l00044"></a>00044 &User::Heap(), <span class="comment">//shared heap is now default</span> |
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49 <a name="l00045"></a>00045 #endif |
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50 <a name="l00046"></a>00046 NULL,EOwnerProcess); |
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51 <a name="l00047"></a>00047 |
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52 <a name="l00048"></a>00048 <span class="keywordflow">if</span> (r!=KErrNone) |
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53 <a name="l00049"></a>00049 <span class="keywordflow">return</span> r; |
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54 <a name="l00050"></a>00050 TRequestStatus stat; |
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55 <a name="l00051"></a>00051 server.Rendezvous(stat); |
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56 <a name="l00052"></a>00052 |
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57 <a name="l00053"></a>00053 <span class="keywordflow">if</span> (stat!=KRequestPending) |
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58 <a name="l00054"></a>00054 server.Kill(KErrCouldNotConnect); <span class="comment">// abort startup</span> |
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59 <a name="l00055"></a>00055 <span class="keywordflow">else</span> |
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60 <a name="l00056"></a>00056 server.Resume(); <span class="comment">// logon OK - start the server</span> |
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61 <a name="l00057"></a>00057 |
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62 <a name="l00058"></a>00058 User::WaitForRequest(stat); <span class="comment">// wait for start or death</span> |
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63 <a name="l00059"></a>00059 <span class="comment">// The server exit type may be a panic value and a panic value can be zero, which is the same value as KErrNone. </span> |
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64 <a name="l00060"></a>00060 <span class="comment">// So, the exit type is tested for a panic before being returned.</span> |
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65 <a name="l00061"></a>00061 r=(server.ExitType()==EExitPanic) ? KErrServerTerminated : stat.Int(); |
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66 <a name="l00062"></a>00062 server.Close(); |
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67 <a name="l00063"></a>00063 <span class="keywordflow">return</span> r; |
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68 <a name="l00064"></a>00064 } |
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69 <a name="l00068"></a><a class="code" href="class_r_thread_client.html#afc30d492698d70ffcf1699ed30be41af">00068</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#afc30d492698d70ffcf1699ed30be41af">RThreadClient::Connect</a>() |
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70 <a name="l00069"></a>00069 { |
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71 <a name="l00070"></a>00070 TInt retry=KCreateSessionRetryCount; |
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72 <a name="l00071"></a>00071 FOREVER |
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73 <a name="l00072"></a>00072 { |
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74 <a name="l00073"></a>00073 <span class="comment">// try to create a session with the server which has KServerDefaultMessageSlots async message slots</span> |
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75 <a name="l00074"></a>00074 TInt r=CreateSession(KThreadServerName, |
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76 <a name="l00075"></a>00075 TVersion(KThreadServerVersion, |
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77 <a name="l00076"></a>00076 KThreadServerMinorVersionNumber, |
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78 <a name="l00077"></a>00077 KThreadServerBuildVersionNumber), |
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79 <a name="l00078"></a>00078 KServerDefaultMessageSlots); |
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80 <a name="l00079"></a>00079 <span class="keywordflow">if</span> (r!=KErrNotFound && r!=KErrServerTerminated) |
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81 <a name="l00080"></a>00080 <span class="keywordflow">return</span> r; |
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82 <a name="l00081"></a>00081 <span class="keywordflow">if</span> (--retry==0) |
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83 <a name="l00082"></a>00082 <span class="keywordflow">return</span> r; |
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84 <a name="l00083"></a>00083 r=StartServer(); |
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85 <a name="l00084"></a>00084 <span class="keywordflow">if</span> (r!=KErrNone && r!=KErrAlreadyExists) |
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86 <a name="l00085"></a>00085 <span class="keywordflow">return</span> r; |
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87 <a name="l00086"></a>00086 <span class="comment">// 1. r=KErrNone means Server starts up successfully</span> |
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88 <a name="l00087"></a>00087 <span class="comment">// 2. r=KErrAlreadyExists means duplicate server was trying to start up </span> |
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89 <a name="l00088"></a>00088 <span class="comment">// Note: if there are other functions called before CServer2::StartL() during construction,</span> |
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90 <a name="l00089"></a>00089 <span class="comment">// other errors might happen when the duplicate server is trying to start</span> |
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91 <a name="l00090"></a>00090 <span class="comment">// therefore, we recommend CServer2::StartL() is the first function in server construction</span> |
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92 <a name="l00091"></a>00091 <span class="comment">// see CThreadServer::ConstructL()</span> |
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93 <a name="l00092"></a>00092 |
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94 <a name="l00093"></a>00093 <span class="comment">// NOTE: If users would like to retry start up server after other scenarios happened, e.g. panic,then go </span> |
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95 <a name="l00094"></a>00094 <span class="comment">// through the following steps:</span> |
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96 <a name="l00095"></a>00095 <span class="comment">// 1. Increase the value of KCreateSessionRetryCount (only start up server once in this example)</span> |
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97 <a name="l00096"></a>00096 <span class="comment">// 2. Need another variable, e.g. TExitType, together with error code returned in StartServer()</span> |
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98 <a name="l00097"></a>00097 <span class="comment">// to distinguish these scenarios</span> |
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99 <a name="l00098"></a>00098 <span class="comment">// 3. modify the third if statement to stop exit when the required scenarios happens.</span> |
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100 <a name="l00099"></a>00099 <span class="comment">// </span> |
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101 <a name="l00100"></a>00100 } |
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102 <a name="l00101"></a>00101 } |
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103 <a name="l00106"></a><a class="code" href="class_r_thread_client.html#a08a81078c1757ec543c957a2bdc926c0">00106</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#a08a81078c1757ec543c957a2bdc926c0">RThreadClient::OpenDriver</a>() |
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104 <a name="l00107"></a>00107 { |
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105 <a name="l00108"></a>00108 <span class="keywordflow">return</span> SendReceive(EThreadServerOpenDriver); |
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106 <a name="l00109"></a>00109 } |
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107 <a name="l00115"></a><a class="code" href="class_r_thread_client.html#a236149601a88df1c7b80fd9259454528">00115</a> EXPORT_C <span class="keywordtype">void</span> <a class="code" href="class_r_thread_client.html#a236149601a88df1c7b80fd9259454528">RThreadClient::Send</a>(<span class="keyword">const</span> TDesC8& aBuf, TRequestStatus& aStatus) |
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108 <a name="l00116"></a>00116 { |
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109 <a name="l00117"></a>00117 SendReceive(EThreadServerSendData, TIpcArgs(&aBuf), aStatus); |
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110 <a name="l00118"></a>00118 } |
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111 <a name="l00122"></a><a class="code" href="class_r_thread_client.html#a177b9da53bb469b741c9b5bb1243b7ec">00122</a> EXPORT_C <span class="keywordtype">void</span> <a class="code" href="class_r_thread_client.html#a177b9da53bb469b741c9b5bb1243b7ec">RThreadClient::SendCancel</a>() |
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112 <a name="l00123"></a>00123 { |
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113 <a name="l00124"></a>00124 SendReceive(EThreadServerSendDataCancel); |
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114 <a name="l00125"></a>00125 } |
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115 <a name="l00130"></a><a class="code" href="class_r_thread_client.html#a6d1378569255876c4a4e901328ad02b3">00130</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#a6d1378569255876c4a4e901328ad02b3">RThreadClient::UnloadDeviceDriver</a>() |
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116 <a name="l00131"></a>00131 { |
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117 <a name="l00132"></a>00132 <span class="keywordflow">return</span> SendReceive(EThreadServerUnloadDeviceDriver); |
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118 <a name="l00133"></a>00133 } |
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119 <a name="l00138"></a><a class="code" href="class_r_thread_client.html#a52eb0c4b09e2f0a7b2f13e91902286b2">00138</a> EXPORT_C TInt <a class="code" href="class_r_thread_client.html#a52eb0c4b09e2f0a7b2f13e91902286b2">RThreadClient::LoadDeviceDriver</a>() |
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120 <a name="l00139"></a>00139 { |
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121 <a name="l00140"></a>00140 <span class="keywordflow">return</span> SendReceive(EThreadServerLoadDeviceDriver); |
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122 <a name="l00141"></a>00141 } |
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123 <a name="l00142"></a>00142 |
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124 <a name="l00143"></a>00143 <span class="comment">//EOF</span> |
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125 </pre></div></div> |
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