79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
#ifndef _MESSAGEMANAGER_H_
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#define _MESSAGEMANAGER_H_
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#include <vector>
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#include <list>
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#include <condition_variable>
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namespace EyeseeLinux {
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class BaseMsgContent
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{
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public:
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virtual ~BaseMsgContent();
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};
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class SmartMessage
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{
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public:
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/**
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User-defined message code so that the recipient can identify
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what this message is about.
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*/
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int what;
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std::vector<int> args;
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std::shared_ptr<BaseMsgContent> spData;
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class MessageReply
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{
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public:
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int mnReplyResult;
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BaseMsgContent *mpReplyData; //derived class type is based on what.
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void NotifyOne();
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int WaitReply(int nTimeout); //unit:ms
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MessageReply();
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~MessageReply();
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private:
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/**
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@param mReplyMutex, mReplyCV, mnReplySemValue
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these params are used to implement semaphore.
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*/
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std::mutex mReplyMutex;
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std::condition_variable mReplyCV;
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int mnReplySemValue;
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};
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std::shared_ptr<MessageReply> spMsgReply;
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int Reset();
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SmartMessage& operator=(const SmartMessage& lRef); //copy assignment
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SmartMessage& operator=(SmartMessage&& rRef); //move assignment, param rRef can't be const, because we will change rRef's member.
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SmartMessage();
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SmartMessage(const SmartMessage& lRef); //copy constructor
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SmartMessage(SmartMessage&& rRef); //move constructor
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~SmartMessage();
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};
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class MessageManager
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{
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public:
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int PutMessage(const SmartMessage& MsgIn);
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int GetMessage(SmartMessage& MsgOut); //return value is NOT_ENOUGH_DATA, UNKNOWN_ERROR, NO_ERROR
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int WaitMessage(unsigned int timeout = 0); //return value is the message number.
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void ClearMessageList();
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int GetMessageCount();
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MessageManager(int nMsgCount=8);
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~MessageManager();
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private:
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std::mutex mLock;
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std::condition_variable mcvMsgListChanged;
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bool mWaitMsgFlag;
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int mCount; //total message count, including idle and valid.
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std::list<SmartMessage> mValidMsgList;
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std::list<SmartMessage> mIdleMsgList;
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};
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}
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#endif /* _MESSAGEMANAGER_H_ */
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