|
1 /* |
|
2 * Copyright (c) 2010 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: |
|
15 * Class definition for Flexible timer server side sessions. Session |
|
16 * instances handle the commmunication with clients and implement a |
|
17 * callback interface for the CFlexTimerEngine to fire timers |
|
18 * |
|
19 */ |
|
20 /* |
|
21 * %version: 1 % |
|
22 */ |
|
23 // Protection against nested includes |
|
24 #ifndef FLEXTIMERSESSION_H |
|
25 #define FLEXTIMERSESSION_H |
|
26 |
|
27 // System includes |
|
28 #include <e32base.h> |
|
29 |
|
30 // User includes |
|
31 #include "mflextimerservicecb.h" |
|
32 |
|
33 // Forward declarations |
|
34 class MFlexTimerService; |
|
35 |
|
36 // Class declaration |
|
37 /** |
|
38 * Flexible timer server side session |
|
39 * CFlexTimerSession implements sessions in CFlexTimerServer. A sessions |
|
40 * parses client messages and adds/cancels timers to CFlexTimerEngine. The |
|
41 * expiration of the timer completes client side message. |
|
42 */ |
|
43 class CFlexTimerSession : public CSession2, public MFlexTimerServiceCB |
|
44 { |
|
45 |
|
46 public: |
|
47 |
|
48 /** |
|
49 * Constructor |
|
50 * |
|
51 * @param aFlexTimerService A pointer to engine interface providing |
|
52 * timeout service |
|
53 */ |
|
54 CFlexTimerSession( MFlexTimerService* aFlexTimerService ); |
|
55 |
|
56 /** |
|
57 * Destructor |
|
58 */ |
|
59 virtual ~CFlexTimerSession(); |
|
60 |
|
61 /** |
|
62 * From: CSession2 |
|
63 * Message handler servicing client requests. Interprets message type and |
|
64 * passes it to correct function for processing. |
|
65 * |
|
66 * @param aMessage Message from client |
|
67 */ |
|
68 void ServiceL( const RMessage2& aMessage ); |
|
69 |
|
70 /** |
|
71 * From CSession2 |
|
72 * Called by a server when it receives a disconnect message for the |
|
73 * session. |
|
74 * |
|
75 * @param aMessage The disconnect message |
|
76 */ |
|
77 void Disconnect( const RMessage2 &aMessage ); |
|
78 |
|
79 /** |
|
80 * From: MFlexTimerServiceCB |
|
81 * Timeout callback function called by timeout engine when a timer |
|
82 * associated to this session expires. |
|
83 * |
|
84 * @see MFlexTimerServiceCB |
|
85 */ |
|
86 virtual void Timeout() const; |
|
87 |
|
88 /** |
|
89 * From: MFlexTimerServiceCB |
|
90 * Callback function called by CFlexTimerEngine, when a timer associated |
|
91 * to this session is aborted. Most probable cause for this is At()-timer |
|
92 * aborting due to the system time change |
|
93 * |
|
94 * @param aReason Error code to be passed for client (KErrAbort in case |
|
95 * of system time change) |
|
96 * |
|
97 * @see MFlexTimerServiceCB |
|
98 */ |
|
99 virtual void Abort( TInt aReason ) const; |
|
100 |
|
101 private: |
|
102 |
|
103 /** |
|
104 * Handles client messages that are issued using At()-function in |
|
105 * RFlexTimer |
|
106 * |
|
107 * @param aMessage Message from client |
|
108 * |
|
109 * @see RFlexTimer |
|
110 */ |
|
111 void NewAtTimer( const RMessage2& aMessage ); |
|
112 |
|
113 /** |
|
114 * Handles client messages that are issued using AtUTC()-function in |
|
115 * RFlexTimer |
|
116 * |
|
117 * @param aMessage Message from client |
|
118 * |
|
119 * @see RFlexTimer |
|
120 */ |
|
121 void NewAtUtcTimer( const RMessage2& aMessage ); |
|
122 |
|
123 /** |
|
124 * Handles client messages that a issued using After()-function in |
|
125 * RFlexTimer |
|
126 * |
|
127 * @param aMessage Message from client |
|
128 * |
|
129 * @see RFlexTimer |
|
130 */ |
|
131 void NewAfterTimer( const RMessage2& aMessage ); |
|
132 |
|
133 /** |
|
134 * Handles client messages that a issued using AfterTicks()-function in |
|
135 * RFlexTimer |
|
136 * |
|
137 * @param aMessage Message from client |
|
138 * |
|
139 * @see RFlexTimer |
|
140 */ |
|
141 void NewAfterTicksTimer( const RMessage2& aMessage ); |
|
142 |
|
143 /** |
|
144 * Handles timer cancellation initiated by client via RFlexTimer::Cancel |
|
145 * |
|
146 * @param aMessage Message from client |
|
147 * |
|
148 * @see RFlexTimer |
|
149 */ |
|
150 void CancelTimer( const RMessage2& aMessage ); |
|
151 |
|
152 /** |
|
153 * Configuration message handler, stores configuration parameters for |
|
154 * this session |
|
155 * |
|
156 * @param aMessage Message from client |
|
157 * |
|
158 * @see RFlexTimer |
|
159 */ |
|
160 void ConfigureParameters( const RMessage2& aMessage ); |
|
161 |
|
162 /** |
|
163 * Inline function for calculating the period from current time to |
|
164 * the timestamp given in message parameters. This is used for |
|
165 * converting the timestamp given in At()- and AtUtc() -functions |
|
166 * to an interval given to DoAddTimer function. |
|
167 * |
|
168 * @param aRefTime Reference time used as a basis for interval |
|
169 * calculation (interval = timestamp - aRefTime) |
|
170 * @param aMessage Message containing timestamp in Int0 and Int1 |
|
171 * parameters (Int0 contains LSW) |
|
172 * @param aInterval On return, contains the interval in microseconds |
|
173 */ |
|
174 inline void GetIntervalToMsgTime( const RMessage2& aMessage, |
|
175 TTime& aRefTime, |
|
176 TTimeIntervalMicroSeconds& aInterval ); |
|
177 |
|
178 /** |
|
179 * Function for adding timer with desired window to engine, called in |
|
180 * AtXxx() and AfterXxx() -functions |
|
181 * |
|
182 * @param aMessage Message from client. Stored if adding a timer is |
|
183 * successful, completed if adding fails |
|
184 * @param aInterval Microseconds until to requested end time |
|
185 * @param aRequestAbort ETrue if timer should be cancelled on system |
|
186 * time change, EFalse otherwise |
|
187 */ |
|
188 void DoAddTimer( const RMessage2& aMessage, |
|
189 TTimeIntervalMicroSeconds& aInterval, |
|
190 TBool aRequestAbort ); |
|
191 |
|
192 private: |
|
193 |
|
194 /** |
|
195 * Pointer to engine interface through which new timers can be added |
|
196 * and cancelled. |
|
197 */ |
|
198 MFlexTimerService* iService; |
|
199 |
|
200 /** |
|
201 * Timeout window size in microseconds (64-bit). Timeout window is |
|
202 * calculated backwards from the absolute timestamp given in AtXxx() |
|
203 * and AfterXxx() -functions |
|
204 */ |
|
205 TTimeIntervalMicroSeconds iTimerWinSize; |
|
206 |
|
207 /** |
|
208 * ETrue if client has not set timeout window, EFalse otherwise |
|
209 */ |
|
210 TBool iUseDefaultWin; |
|
211 |
|
212 /** |
|
213 * Handle to pending timeout message |
|
214 */ |
|
215 RMessagePtr2 iPendingTimeoutMsg; |
|
216 }; |
|
217 |
|
218 #include "flextimersession.inl" |
|
219 |
|
220 #endif /* FLEXTIMERSESSION_H */ |