2 * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 * @author Karol Majewski (k.majewski@samsung.com)
22 #ifndef WRTDEVICEAPIS_COMMONS_IEVENT_H_
23 #define WRTDEVICEAPIS_COMMONS_IEVENT_H_
26 #include <dpl/event/controller.h>
27 #include <dpl/mutex.h>
28 #include <dpl/shared_ptr.h>
29 #include <Commons/Exception.h>
30 #include <Commons/EventReceiver.h>
32 namespace WrtDeviceApis {
34 class IEventPrivateData
37 virtual ~IEventPrivateData()
41 class IEventController
43 DPL::SharedPtr<IEventPrivateData> m_privateData;
46 virtual void waitTillProcessed() = 0;
47 virtual void waitForAnswer() = 0;
48 virtual bool cancelRequest()
52 virtual bool changeCallToSynchronous() = 0;
53 virtual ~IEventController()
57 const DPL::SharedPtr<IEventPrivateData> &privateData)
59 m_privateData = privateData;
61 const DPL::SharedPtr<IEventPrivateData>& getPrivateData()
66 typedef DPL::SharedPtr<IEventController> IEventControllerPtr;
70 class IEvent : /*private DPL::WaitableEvent, */ public IEventController
73 friend class EventRequestReceiver<Super>;
74 friend class EventAnswerReceiver<Super>;
75 friend class SignalEventCall<Super>;
76 friend class EventReceiver<Super>;
80 HANDLING_NOT_SET = -1,
81 HANDLING_SYNCHRONOUS = 0,
82 HANDLING_ASYNCHRONOUS = 1,
83 HANDLING_SYNCHRONOUS_MANUAL_ANSWER = 2,
84 HANDLING_ASYNCHRONOUS_MANUAL_ANSWER = 3
91 STATE_REQUEST_RECEIVED,
93 STATE_ANSWER_RECEIVED,
95 STATE_CHANGED_TO_SYNCHRONOUS
102 m_state = STATE_ENDED;
103 m_exceptionCode = Commons::ExceptionCodes::EventCancelledException;
104 //if someone is waiting
105 signalSynchronousEventFlag();
109 DPL::Mutex m_stateMutex;
111 HandlingType m_handlingType;
112 EventAnswerReceiver< Super > *m_remoteController;
113 Commons::ExceptionCodes::Enumeration m_exceptionCode;
114 DPL::WaitableEvent *m_synchronousEventFlag;
115 DPL::WaitableEvent *m_finishedFlag;
116 DPL::WaitableEvent *m_cancelStatusFlag;
118 bool m_cancelAllowed;
121 m_state(STATE_INITIAL),
122 m_handlingType(HANDLING_NOT_SET),
123 m_remoteController(NULL),
124 m_exceptionCode(Commons::ExceptionCodes::None),
125 m_synchronousEventFlag(NULL),
126 m_finishedFlag(NULL),
127 m_cancelStatusFlag(NULL),
129 m_cancelAllowed(false)
132 virtual void waitForAnswer()
134 assert(HANDLING_SYNCHRONOUS == m_handlingType);
135 DPL::WaitForSingleHandle(m_synchronousEventFlag->GetHandle());
137 DPL::Mutex::ScopedLock lock(&m_stateMutex);
138 m_state = STATE_ENDED;
140 signalFinishedFlag();
141 LogDebug("deleting m_processEvent");
142 delete m_synchronousEventFlag;
143 m_synchronousEventFlag = NULL;
146 void signalFinishedFlag()
148 if (m_finishedFlag) {
149 m_finishedFlag->Signal();
153 DPL::WaitableEvent &getFinishedFlag()
155 if (!m_finishedFlag) {
156 m_finishedFlag = new DPL::WaitableEvent();
158 return *m_finishedFlag;
161 void signalCancelStatusFlag()
163 LogDebug("signaling cancel");
164 getCancelStatusFlag().Signal();
167 DPL::WaitableEvent &getCancelStatusFlag()
169 if (!m_cancelStatusFlag) {
170 m_cancelStatusFlag = new DPL::WaitableEvent();
172 return *m_cancelStatusFlag;
175 void signalSynchronousEventFlag()
177 if (m_synchronousEventFlag) {
178 m_synchronousEventFlag->Signal();
185 * Gets the answer receiver pointer.
187 EventAnswerReceiver< Super > * getAnswerReceiverRef() const
189 return m_remoteController;
194 delete m_cancelStatusFlag;
195 delete m_finishedFlag;
196 delete m_synchronousEventFlag;
199 virtual bool changeCallToSynchronous()
201 return setForSynchronousCall();
204 virtual void waitTillProcessed()
206 DPL::WaitForSingleHandle(getFinishedFlag().GetHandle());
207 delete m_finishedFlag;
208 m_finishedFlag = NULL;
211 virtual void clearOnCancel()
214 Commons::ExceptionCodes::Enumeration getExceptionCode() const
216 return m_exceptionCode;
218 void setExceptionCode(Commons::ExceptionCodes::Enumeration exceptionCode)
220 m_exceptionCode = exceptionCode;
223 short getHandlingType() const
225 return m_handlingType;
228 virtual bool setForSynchronousCall()
230 DPL::Mutex::ScopedLock lock(&m_stateMutex);
235 case STATE_ANSWER_SEND:
236 m_state = STATE_CHANGED_TO_SYNCHRONOUS;
238 case STATE_ANSWER_RECEIVED:
244 m_handlingType = HANDLING_SYNCHRONOUS;
248 virtual bool setForAsynchronousCall(
249 EventAnswerReceiver< Super > *remoteController)
251 DPL::Mutex::ScopedLock lock(&m_stateMutex);
256 case STATE_ANSWER_SEND:
257 case STATE_ANSWER_RECEIVED:
263 m_handlingType = HANDLING_ASYNCHRONOUS;
264 m_remoteController = remoteController;
269 * Normally, after invoking OnRequestReceived in RequestReceiver, the answer
270 * is being send automatically (after flow leaves OnRequestReceived).
271 * After calling this function, the answer is not being send automatically,
272 * you need to call ManualAnswer to send event back.
273 * It works both in asynchronous and synchronous handling type.
275 virtual bool switchToManualAnswer()
278 m_handlingType == HANDLING_ASYNCHRONOUS || m_handlingType ==
279 HANDLING_SYNCHRONOUS);
281 DPL::Mutex::ScopedLock lock(&m_stateMutex);
286 case STATE_ANSWER_SEND:
287 case STATE_ANSWER_RECEIVED:
294 switch (m_handlingType) {
295 case HANDLING_ASYNCHRONOUS:
296 m_handlingType = HANDLING_ASYNCHRONOUS_MANUAL_ANSWER;
298 case HANDLING_SYNCHRONOUS:
299 m_handlingType = HANDLING_SYNCHRONOUS_MANUAL_ANSWER;
307 bool checkCancelled()
309 //DPL::Mutex::ScopedLock lock(&m_stateMutex);
315 //DPL::Mutex::ScopedLock lock(&m_stateMutex);
317 Throw(Commons::EventCancelledException);
321 bool getCancelAllowed() const
323 return m_cancelAllowed;
326 void setCancelAllowed(bool cancelAllowed)
328 m_cancelAllowed = cancelAllowed;
333 LogDebug("trying to cancel");
335 HANDLING_ASYNCHRONOUS == m_handlingType ||
336 HANDLING_ASYNCHRONOUS_MANUAL_ANSWER == m_handlingType);
338 DPL::Mutex::ScopedLock lock(&m_stateMutex);
345 case STATE_ANSWER_SEND:
346 LogDebug("cancelling");
348 delete m_cancelStatusFlag;
349 m_cancelStatusFlag = NULL;
350 return m_cancelAllowed;
351 case STATE_ANSWER_RECEIVED:
357 LogDebug("cancelling");
360 LogDebug("waiting for cancel flag");
361 DPL::WaitForSingleHandle(getCancelStatusFlag().GetHandle());
362 delete m_cancelStatusFlag;
363 m_cancelStatusFlag = NULL;
364 return m_cancelAllowed;
368 } // WrtDeviceApisCommon
370 #endif /* WRTDEVICEAPIS_COMMONS_IEVENT_H_ */