113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef AML_MP_EVENT_LOOPER_H_
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#define AML_MP_EVENT_LOOPER_H_
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#include <string>
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//#include <utils/Errors.h>
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#include <vector>
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#include <list>
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#include "AmlMpRefBase.h"
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#include "AmlMpThread.h"
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namespace aml_mp {
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struct AmlMpEventHandler;
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struct AmlMpMessage;
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struct AReplyToken;
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struct AmlMpEventLooper : public AmlMpRefBase {
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typedef int32_t event_id;
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typedef int32_t handler_id;
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AmlMpEventLooper();
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// Takes effect in a subsequent call to start().
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void setName(const char *name);
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handler_id registerHandler(const sptr<AmlMpEventHandler> &handler);
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void unregisterHandler(handler_id handlerID);
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int start(
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bool runOnCallingThread = false,
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bool canCallJava = false,
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int32_t priority = 0
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);
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int stop();
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static int64_t GetNowUs();
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const char *getName() const {
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return mLooperName.c_str();
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}
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protected:
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virtual ~AmlMpEventLooper();
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private:
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friend struct AmlMpMessage; // post()
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struct Event {
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//coverity[member_not_init_in_gen_ctor]
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int64_t mWhenUs;
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sptr<AmlMpMessage> mMessage;
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};
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std::mutex mLock;
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std::condition_variable mQueueChangedCondition;
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std::string mLooperName;
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std::list<Event> mEventQueue;
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struct LooperThread;
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sptr<LooperThread> mThread;
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bool mRunningLocally;
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// use a separate lock for reply handling, as it is always on another thread
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// use a central lock, however, to avoid creating a mutex for each reply
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std::mutex mRepliesLock;
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std::condition_variable mRepliesCondition;
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// START --- methods used only by AMessage
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// posts a message on this looper with the given timeout
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void post(const sptr<AmlMpMessage> &msg, int64_t delayUs);
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// creates a reply token to be used with this looper
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sptr<AReplyToken> createReplyToken();
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// waits for a response for the reply token. If status is OK, the response
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// is stored into the supplied variable. Otherwise, it is unchanged.
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int awaitResponse(const sptr<AReplyToken> &replyToken, sptr<AmlMpMessage> *response);
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// posts a reply for a reply token. If the reply could be successfully posted,
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// it returns OK. Otherwise, it returns an error value.
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int postReply(const sptr<AReplyToken> &replyToken, const sptr<AmlMpMessage> &msg);
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// END --- methods used only by AMessage
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bool loop();
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AmlMpEventLooper(const AmlMpEventLooper&) = delete;
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AmlMpEventLooper& operator=(const AmlMpEventLooper&) = delete;
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};
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} // namespace android
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#endif // A_LOOPER_H_
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