C ++-如何使用Boost恢复线程？

Question

摘要：客户端与其他用户一起位于Teamspeak服务器中。 当其他用户开始讲话时，此插件每500毫秒对用户运行一次setSpeakerPosition()函数，直到他们停止讲话为止。 如果他们再次讲话，就应该重新做一次。

问题：如果我每次他们讲话时都简单地执行.reset(new boost::thread(...)) ，似乎会覆盖现有线程（如果之前已经讲过）并导致崩溃。 我相信我需要“复兴”现有线程，或适当地杀死它。

// Create an array like: speakingThreads[client_id] = array(bIsSpeaking, ptrThread)
typedef boost::shared_ptr<boost::thread> SmartThread;
map<anyID, pair<bool, SmartThread>> speakingThreads;

// Called when someone starts or stops talking
void ts3plugin_onTalkStatusChangeEvent(uint64 serverConnectionHandlerID, int status, int isReceivedWhisper, anyID clientID) {

    // Get my client id
    anyID myID;
    ts3Functions.getClientID(serverConnectionHandlerID, &myID);

    // If someone else starts talking
    if(clientID != myID && status == STATUS_TALKING) {
        // Set client to 'is speaking' (allows thread loop to run)
        speakingThreads[clientID].first = true;

        // If this is the first time they have spoken, start a thread
        if(speakingThreads[clientID].second == NULL) {
            // Create thread to keep updating speaker position while he's speaking
            speakingThreads[clientID].second.reset(new boost::thread(speakerActiveThread, serverConnectionHandlerID, clientID));
            _log("Starting Thread", 0);
        }
        // Or if they've spoken before, revive the thread
        else {
            speakingThreads[clientID].second->speakerActiveThread(serverConnectionHandlerID, clientID); // error C2039: 'speakerActiveThread' : is not a member of 'boost::thread'
            _log("Reviving Thread", 0);
        }
    }
    // If someone else stops talking
    else if(clientID != myID && status == STATUS_NOT_TALKING) {
        if(speakingThreads.find(clientID) != speakingThreads.end()) {
            // Disable thread loop for the speaker to stop updating his position
            speakingThreads[clientID].first = false;
            _log("Interrupted Speaking Thread", 0);
        }
    }
}

// Thread run when someone starts speaking, loops until they finish speaking
void speakerActiveThread(uint64 serverConnectionHandlerID, anyID clientID) {
    // While client 'is speaking'
    while(speakingThreads[clientID].first) {
        if(setSpeakerPosition(serverConnectionHandlerID, clientID) != ERROR_ok) {
            _log("ERROR Setting Speaker Position", 1);
        }
        _log("Set Speaker Position", 0);
        Sleep(UPDATE_SPEAKER_MS); // 500
    }
}

Answer 1

您不能“重新启动”线程。 创建boost :: thread对象后，将要执行的线程函数传递给该对象，该函数在单独的OS线程中运行； 函数结束时-线程结束（退出）。 请注意，如果boost :: thread对象被破坏（例如，超出范围），则它不会影响线程本身。