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 {
35 class IEventPrivateData
38 virtual ~IEventPrivateData()
44 class IEventController
46 DPL::SharedPtr<IEventPrivateData> m_privateData;
48 virtual void waitTillProcessed() = 0;
49 virtual void waitForAnswer() = 0;
50 virtual bool cancelRequest()
54 virtual bool changeCallToSynchronous() = 0;
55 virtual ~IEventController()
60 const DPL::SharedPtr<IEventPrivateData> &privateData)
62 m_privateData = privateData;
64 const DPL::SharedPtr<IEventPrivateData>& getPrivateData()
69 typedef DPL::SharedPtr<IEventController> IEventControllerPtr;
74 class IEvent : /*private DPL::WaitableEvent, */ public IEventController
77 friend class EventRequestReceiver<Super>;
78 friend class EventAnswerReceiver<Super>;
79 friend class SignalEventCall<Super>;
83 HANDLING_NOT_SET = -1,
84 HANDLING_SYNCHRONOUS = 0,
85 HANDLING_ASYNCHRONOUS = 1,
86 HANDLING_SYNCHRONOUS_MANUAL_ANSWER = 2,
87 HANDLING_ASYNCHRONOUS_MANUAL_ANSWER = 3
94 STATE_REQUEST_RECEIVED,
96 STATE_ANSWER_RECEIVED,
98 STATE_CHANGED_TO_SYNCHRONOUS
105 m_state = STATE_ENDED;
106 m_exceptionCode = Commons::ExceptionCodes::EventCancelledException;
107 //if someone is waiting
108 signalSynchronousEventFlag();
111 DPL::Mutex m_stateMutex;
113 HandlingType m_handlingType;
114 EventAnswerReceiver< Super > *m_remoteController;
115 Commons::ExceptionCodes::Enumeration m_exceptionCode;
116 DPL::WaitableEvent *m_synchronousEventFlag;
117 DPL::WaitableEvent *m_finishedFlag;
118 DPL::WaitableEvent *m_cancelStatusFlag;
120 bool m_cancelAllowed;
123 m_state(STATE_INITIAL),
124 m_handlingType(HANDLING_NOT_SET),
125 m_remoteController(NULL),
126 m_exceptionCode(Commons::ExceptionCodes::None),
127 m_synchronousEventFlag(NULL),
128 m_finishedFlag(NULL),
129 m_cancelStatusFlag(NULL),
131 m_cancelAllowed(false)
135 virtual void waitForAnswer()
137 assert(HANDLING_SYNCHRONOUS == m_handlingType);
138 DPL::WaitForSingleHandle(m_synchronousEventFlag->GetHandle());
140 DPL::Mutex::ScopedLock lock(&m_stateMutex);
141 m_state = STATE_ENDED;
143 signalFinishedFlag();
144 LogDebug("deleting m_processEvent");
145 delete m_synchronousEventFlag;
146 m_synchronousEventFlag = NULL;
149 void signalFinishedFlag()
151 if (m_finishedFlag) {
152 m_finishedFlag->Signal();
156 DPL::WaitableEvent &getFinishedFlag()
158 if (!m_finishedFlag) {
159 m_finishedFlag = new DPL::WaitableEvent();
161 return *m_finishedFlag;
164 void signalCancelStatusFlag()
166 LogDebug("signaling cancel");
167 getCancelStatusFlag().Signal();
170 DPL::WaitableEvent &getCancelStatusFlag()
172 if (!m_cancelStatusFlag) {
173 m_cancelStatusFlag = new DPL::WaitableEvent();
175 return *m_cancelStatusFlag;
178 void signalSynchronousEventFlag()
180 if (m_synchronousEventFlag) {
181 m_synchronousEventFlag->Signal();
188 * Gets the answer receiver pointer.
190 EventAnswerReceiver< Super > * getAnswerReceiverRef() const
192 return m_remoteController;
197 delete m_cancelStatusFlag;
198 delete m_finishedFlag;
199 delete m_synchronousEventFlag;
202 virtual bool changeCallToSynchronous()
204 return setForSynchronousCall();
207 virtual void waitTillProcessed()
209 DPL::WaitForSingleHandle(getFinishedFlag().GetHandle());
210 delete m_finishedFlag;
211 m_finishedFlag = NULL;
214 virtual void clearOnCancel()
218 Commons::ExceptionCodes::Enumeration getExceptionCode() const
220 return m_exceptionCode;
222 void setExceptionCode(Commons::ExceptionCodes::Enumeration exceptionCode)
224 m_exceptionCode = exceptionCode;
227 short getHandlingType() const
229 return m_handlingType;
232 virtual bool setForSynchronousCall()
234 DPL::Mutex::ScopedLock lock(&m_stateMutex);
239 case STATE_ANSWER_SEND:
240 m_state = STATE_CHANGED_TO_SYNCHRONOUS;
242 case STATE_ANSWER_RECEIVED:
248 m_handlingType = HANDLING_SYNCHRONOUS;
252 virtual bool setForAsynchronousCall(
253 EventAnswerReceiver< Super > *remoteController)
255 DPL::Mutex::ScopedLock lock(&m_stateMutex);
260 case STATE_ANSWER_SEND:
261 case STATE_ANSWER_RECEIVED:
267 m_handlingType = HANDLING_ASYNCHRONOUS;
268 m_remoteController = remoteController;
273 * Normally, after invoking OnRequestReceived in RequestReceiver, the answer is being send automatically (after flow leaves OnRequestReceived).
274 * After calling this function, the answer is not being send automatically, you need to call ManualAnswer to send event back.
275 * It works both in asynchronous and synchronous handling type.
277 virtual bool switchToManualAnswer()
280 m_handlingType == HANDLING_ASYNCHRONOUS || m_handlingType ==
281 HANDLING_SYNCHRONOUS);
283 DPL::Mutex::ScopedLock lock(&m_stateMutex);
288 case STATE_ANSWER_SEND:
289 case STATE_ANSWER_RECEIVED:
296 switch (m_handlingType) {
297 case HANDLING_ASYNCHRONOUS:
298 m_handlingType = HANDLING_ASYNCHRONOUS_MANUAL_ANSWER;
300 case HANDLING_SYNCHRONOUS:
301 m_handlingType = HANDLING_SYNCHRONOUS_MANUAL_ANSWER;
309 bool checkCancelled()
311 //DPL::Mutex::ScopedLock lock(&m_stateMutex);
317 //DPL::Mutex::ScopedLock lock(&m_stateMutex);
319 Throw(Commons::EventCancelledException);
323 bool getCancelAllowed() const
325 return m_cancelAllowed;
328 void setCancelAllowed(bool cancelAllowed)
330 m_cancelAllowed = cancelAllowed;
335 LogDebug("trying to cancel");
337 HANDLING_ASYNCHRONOUS == m_handlingType ||
338 HANDLING_ASYNCHRONOUS_MANUAL_ANSWER == m_handlingType);
340 DPL::Mutex::ScopedLock lock(&m_stateMutex);
347 case STATE_ANSWER_SEND:
348 LogDebug("cancelling");
350 delete m_cancelStatusFlag;
351 m_cancelStatusFlag = NULL;
352 return m_cancelAllowed;
353 case STATE_ANSWER_RECEIVED:
359 LogDebug("cancelling");
362 LogDebug("waiting for cancel flag");
363 DPL::WaitForSingleHandle(getCancelStatusFlag().GetHandle());
364 delete m_cancelStatusFlag;
365 m_cancelStatusFlag = NULL;
366 return m_cancelAllowed;
371 } // WrtDeviceApisCommon
373 #endif /* WRTDEVICEAPIS_COMMONS_IEVENT_H_ */