qt 多线程法度模范设计[欣赏]

qt 多线程法度模范 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 [欣赏] QT 多线程程序设计 QT 澶氱嚎绋嬬?搴忚 璁? QT閫氳繃涓夌 褰?紡鎻愪緵浜嗗 绾跨?鐨勬敮鎸併?傚畠浠 垎鍒 槸锛屼竴銆佸钩鍙版棤鍏崇殑绾跨?绫伙紝浜屻?佺嚎绋嬪畨鍏ㄧ殑浜嬩欢鎶曢?掞紝涓夈?佽法绾跨?鐨勪俊鍙?妲借繛鎺ャ?傝繖浣垮緱寮?鍙戣交宸х殑澶氱嚎绋婹t绋嬪簭鏇翠负瀹规槗锛屽苟鑳藉厖鍒嗗埄鐢ㄥ 澶勭悊鍣ㄦ満鍣ㄧ殑浼樺娍銆傚 绾跨?缂栫?涔熸槸涓?涓 湁鐢ㄧ殑妯″紡锛屽畠鐢ㄤ簬瑙,喅鎵ц 杈冮暱鏃堕棿鐨勬搷浣滆?屼笉鑷充簬鐢ㄦ埛鐣岄潰澶卞幓鍝嶅簲銆傚湪Qt鐨勬棭鏈熺増鏈 腑锛屽湪鏋勫缓搴撴椂鏈変笉閫夋嫨绾跨?鏀 寔鐨勯?夐」锛屼粠4.0寮?濮嬶紝绾跨?鎬绘槸鏈夋晥鐨勩?? 绾跨?绫? Qt 鍖呭惈涓嬮潰涓?浜涚嚎绋嬬浉鍏崇殑绫伙細 QThread 鎻愪緵浜嗗紑濮嬩竴涓 柊绾跨?鐨勬柟娉? QThreadStorage 鎻愪緵閫愮嚎绋嬫暟鎹 瓨鍌? QMutex 鎻愪緵鐩镐簰鎺掓枼鐨勯攣锛屾垨浜掓枼閲? QMutexLocker 鏄 竴涓 究鍒?被锛屽畠鍙 互鑷 姩瀵筈Mutex鍔犻攣涓庤В閿? QReadWriterLock 鎻愪緵浜嗕竴涓 彲浠ュ悓鏃惰 鎿嶄綔鐨勯攣 QReadLocker涓嶲WriteLocker 鏄 究鍒?被锛屽畠鑷 姩瀵筈ReadWriteLock鍔犻攣涓庤В閿? QSemaphore 鎻愪緵浜嗕竴涓 暣鍨嬩俊鍙烽噺锛屾槸浜掓枼閲忕殑娉涘寲 QWaitCondition 鎻愪緵浜嗕竴绉嶆柟娉曪紝浣垮緱绾跨?鍙 互鍦ㄨ 鍙， 绾跨?鍞ら啋涔嬪墠涓?鐩翠紤鐪犮?? 鍒涘缓涓?涓 嚎绋? 涓哄垱寤轰竴涓 嚎绋嬶紝瀛愮被鍖朡Thread骞朵笖閲嶅啓瀹冪殑run()鍑芥暟锛屼緥濡傦細 class MyThread : public QThread { Q_OBJECT protected: void run(); }; void MyThread::run() { ... } 涔嬪悗锛屽垱寤鸿繖涓 嚎绋嬪 璞,殑瀹炰緥锛岃皟鐢?Thread::start()銆備簬鏄 紝鍦?un()閲屽嚭鐜扮殑浠,爜灏嗕 細鍦ㄥ彟澶栫嚎绋嬩腑琚 墽琛屻?? 娉ㄦ剰锛歈CoreApplication::exec()蹇呴』鎬绘槸鍦ㄤ富绾跨?(鎵ц main()鐨勯偅涓 嚎绋?涓 璋冪敤锛屼笉鑳戒粠涓?涓猀Thread涓 皟鐢ㄣ?傚湪GUI绋嬪簭涓 紝涓荤嚎绋嬩篃琚 О涓篏UI绾跨?锛屽洜涓哄畠鏄 敮涓?涓?涓 厑璁告墽琛孏UI鐩稿叧鎿嶄綔鐨勭嚎绋嬨?傚彟澶栵紝浣犲繀椤诲湪鍒涘缓涓?涓猀Thread涔嬪墠鍒涘缓QApplication(or QCoreApplication)瀵硅薄銆? 绾跨?鍚屾 QMutex, QReadWriteLock, QSemaphore, QWaitCondition 鎻愪緵浜嗙嚎绋嬪悓姝ョ殑鎵嬫 銆備娇鐢ㄧ嚎绋嬬殑涓昏 鎯虫硶鏄 笇鏈涘畠浠 彲浠ュ敖鍙 兘骞跺彂鎵ц 锛岃?屼竴浜涘叧閿 偣涓婄嚎绋嬩箣闂撮渶瑕佸仠姝?垨绛夊緟銆備緥濡傦紝鍋囧 涓や釜绾跨?璇曞浘鍚屾椂璁块棶鍚屼竴涓 叏灞?鍙橀噺锛岀粨鏋滃彲鑳戒笉濡傛墍鎰裤?? QMutex 鎻愪緵鐩镐簰鎺掓枼鐨勯攣锛屾垨浜掓枼閲忋?傚湪涓?涓 椂鍒昏嚦澶氫竴涓 嚎绋嬫嫢鏈塵utex,鍋囧 涓?涓 嚎绋嬭瘯鍥捐 闂 凡缁忚 閿佸畾鐨刴utex,閭,箞瀹冨皢浼戠湢锛岀洿鍒版嫢鏈塵utex鐨勭嚎绋嬪 姝 utex瑙,攣銆侻utexes甯哥敤鏉ヤ繚鎶ゅ叡浜 暟鎹 闂 ?? QReadWriterLock 涓嶲Mutex鐩镐技锛岄櫎浜嗗畠 瀵?"read","write"璁块棶杩涜 鍖哄埆瀵瑰緟銆傚畠浣垮緱澶氫釜璇昏?呭彲浠ュ叡鏃惰 闂 暟鎹 ?備娇鐢?ReadWriteLock鑰屼笉 鏄疩Mutex锛屽彲浠ヤ娇寰楀 绾跨?绋嬪簭鏇村叿鏈夊苟鍙戞?с?? QReadWriteLock lock; void ReaderThread::run() { // ... lock.lockForRead(); read_file(); lock.unlock(); //... } void WriterThread::run() { // ... lock.lockForWrite(); write_file(); lock.unlock(); // ... } QSemaphore 鏄疩Mutex鐨勪竴鑸 寲锛屽畠鍙 互淇濇姢涓?瀹氭暟閲忕殑鐩稿悓璧勬簮锛屼笌姝ょ浉瀵癸紝涓?涓猰utex鍙 繚鎶や竴涓 祫婧愩?備笅闈 緥瀛愪腑锛屼娇鐢?Semaphore鏉ユ帶鍒跺 鐜 姸缂撳啿鐨勮 闂 紝姝ょ紦鍐插尯琚 敓浜ц?呯嚎绋嬪拰娑堣垂鑰呯嚎绋嬪叡浜 ?傜敓浜ц?呬笉鏂 悜缂撳啿鍐欏叆鏁版嵁鐩村埌缂撳啿鏈 锛屽啀浠庡ご寮?濮嬨?傛秷璐硅?呬粠缂撳啿涓嶆柇璇诲彇鏁版嵁銆備俊鍙烽噺姣斾簰鏂ラ噺鏈夋洿濂界殑骞跺彂鎬э紝鍋囧 鎴戜滑鐢ㄤ簰鏂ラ噺鏉ユ帶鍒跺 缂撳啿鐨勮 闂 紝閭,箞鐢熶骇鑰咃紝娑堣垂鑰呬笉鑳藉悓鏃惰 闂 紦鍐层?傜劧鑰岋紝鎴戜滑鐭ラ亾鍦ㄥ悓涓?鏃跺埢锛屼笉鍚岀嚎绋嬭 闂 紦鍐茬殑涓嶅悓閮ㄥ垎骞舵病鏈変粈涔堝嵄瀹炽?? const int DataSize = 100000; const int BufferSize = 8192; char buffer[BufferSize]; QSemaphore freeBytes(BufferSize); QSemaphore usedBytes; class Producer : public QThread { public: void run(); }; void Producer::run() { qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); for (int i = 0; i < DataSize; ++i) { freeBytes.acquire(); buffer[i % BufferSize] = "ACGT"[(int)qrand() % 4]; usedBytes.release(); } } class Consumer : public QThread { public: void run(); }; void Consumer::run() { for (int i = 0; i < DataSize; ++i) { usedBytes.acquire(); fprintf(stderr, "%c", buffer[i % BufferSize]); freeBytes.release(); } fprintf(stderr, "\n"); } int main(int argc, char *argv[]) { QCoreApplication app(argc, argv); Producer producer; Consumer consumer; producer.start(); consumer.start(); producer.wait(); consumer.wait(); return 0; } QWaitCondition 鍏佽 绾跨?鍦ㄦ煇浜涙儏鍐靛彂鐢熸椂鍞ら啋鍙， 鐨勭嚎绋嬨?備竴涓 垨澶氫釜绾跨?鍙 互闃诲 绛夊緟涓?QWaitCondition ,鐢?akeOne()鎴杦akeAll()璁剧疆涓?涓 潯浠躲?倃akeOne()闅忔満鍞ら啋涓?涓 紝wakeAll()鍞ら啋鎵?鏈夈?? 涓嬮潰鐨勪緥瀛愪腑锛岀敓浜ц?呴 鍏堝繀椤绘 鏌ョ紦鍐叉槸鍚，凡婊?numUsedBytes==BufferSize)锛屽 鏋滄槸锛岀嚎绋嬪仠涓嬫潵绛夊緟bufferNotFull鏉′欢銆傚 鏋滀笉鏄 紝鍦ㄧ紦鍐蹭腑鐢熶骇鏁版嵁锛屽 鍔爊umUsedBytes,婵?娲绘潯 浠?bufferNotEmpty銆備娇鐢?utex鏉ヤ繚鎶ゅ numUsedBytes鐨 勮 闂 ?傚彟澶栵紝QWaitCondition::wait()鎺ユ敹涓?涓猰utex浣滀负鍙傛暟锛岃繖涓猰utex搴旇 琚 皟鐢ㄧ嚎绋嬪垵濮嬪寲涓洪攣瀹氱姸鎬併?傚湪绾跨?杩涘叆浼戠湢鐘舵?佷箣鍓嶏紝mutex浼氳 瑙,攣銆傝?屽綋绾跨?琚 敜閱掓椂锛宮utex浼氬 浜庨攣瀹氱姸鎬?鑰屼笖锛屼粠閿佸畾鐘舵?佸埌绛夊緟鐘舵?佺殑杞 崲鏄 師瀛愭搷浣滐紝杩欓樆姝 簡绔炰簤鏉′欢鐨勪骇鐢熴?傚綋绋嬪簭寮?濮嬭繍琛屾椂锛屽彧鏈夌敓浜ц?呭彲浠ュ伐浣溿?傛秷璐硅?呰 闃诲 绛夊緟bufferNotEmpty鏉′欢锛屼竴鏃,敓浜ц?呭湪缂撳啿涓 斁鍏ヤ竴涓 瓧鑺傦紝bufferNotEmpty鏉′欢琚 縺鍙戯紝娑堣垂鑰呯嚎绋嬩簬鏄 鍞ら啋銆? const int DataSize = 100000; const int BufferSize = 8192; char buffer[BufferSize]; QWaitCondition bufferNotEmpty; QWaitCondition bufferNotFull; QMutex mutex; int numUsedBytes = 0; class Producer : public QThread { public: void run(); }; void Producer::run() { qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); for (int i = 0; i < DataSize; ++i) { mutex.lock(); if (numUsedBytes == BufferSize) bufferNotFull.wait(&mutex); mutex.unlock(); buffer[i % BufferSize] = "ACGT"[(int)qrand() % 4]; mutex.lock(); ++numUsedBytes; bufferNotEmpty.wakeAll(); mutex.unlock(); } } class Consumer : public QThread { public: void run(); }; void Consumer::run() { for (int i = 0; i < DataSize; ++i) { mutex.lock(); if (numUsedBytes == 0) bufferNotEmpty.wait(&mutex); mutex.unlock(); fprintf(stderr, "%c", buffer[i % BufferSize]); mutex.lock(); --numUsedBytes; bufferNotFull.wakeAll(); mutex.unlock(); } fprintf(stderr, "\n"); } int main(int argc, char *argv[]) { QCoreApplication app(argc, argv); Producer producer; Consumer consumer; producer.start(); consumer.start(); producer.wait(); consumer.wait(); return 0; } 鍙 噸鍏ヤ笌绾跨?瀹夊叏 鍦?t鏂囨。涓 紝鏈 鈥滃彲閲嶅叆鈥濅笌鈥滅嚎绋嬪畨鍏ㄢ?濊 鐢ㄦ潵璇存槑涓?涓 嚱鏁板 浣曠敤浜庡 绾跨?绋嬪簭銆傚亣濡備竴涓 被鐨勪换浣曞嚱鏁板湪姝ょ被鐨勫 涓 笉鍚岀殑瀹炰緥涓婏紝鍙 互琚 涓 嚎绋嬪悓鏃惰皟鐢 紝閭,箞杩欎釜绫昏 绉颁负鏄 ?滃彲閲嶅叆鈥濈殑銆傚亣濡備笉鍚岀殑绾跨?浣滅敤鍦ㄥ悓涓?涓 疄渚嬩笂浠嶅彲浠ユ 甯稿伐浣滐紝閭,箞绉颁箣涓衡?滅嚎绋嬪畨鍏ㄢ?濈殑銆? 澶у 鏁癱++绫诲ぉ鐢熷氨鏄 彲閲嶅叆鐨勶紝鍥犱负瀹冧滑鍏稿瀷鍦颁粎浠呭紩鐢ㄦ垚鍛樻暟鎹 ?備换浣曠嚎绋嬪彲浠ュ湪绫荤殑涓?涓 疄渚嬩笂璋冪敤杩欐牱鐨勬垚鍛樺嚱鏁帮紝鍙 娌?湁鍒 殑绾跨?鍦ㄥ悓涓?涓 疄渚嬩笂璋冪敤杩欎釜鎴愬憳鍑芥暟銆備妇渚嬫潵璁诧紝涓嬮潰鐨凜ounter 绫绘槸鍙 噸鍏ョ殑锛? class Counter { public: Counter() {n=0;} void increment() {++n;} void decrement() {--n;} int value() const {return n;} private: int n; }; 杩欎釜绫讳笉鏄 嚎绋嬪畨鍏ㄧ殑锛屽洜涓哄亣濡傚 涓 嚎绋嬮兘璇曞浘淇 敼鏁版嵁鎴愬憳 n,缁撴灉鏈 畾涔夈?傝繖鏄 洜涓篶++涓 殑++鍜?-鎿嶄綔绗，笉鏄 師瀛愭搷浣溿?傚疄闄呬笂锛屽畠浠 細琚 墿灞曚负涓変釜鏈哄櫒鎸囦护锛? 1锛屾妸鍙橀噺鍊艰 鍏ュ瘎瀛樺櫒 2锛屽 鍔犳垨鍑忓皯瀵勫瓨鍣ㄤ腑鐨勫?? 3锛屾妸瀵勫瓨鍣ㄤ腑鐨勫?煎啓鍥炲唴瀛? 鍋囧 绾跨?A涓嶣鍚屾椂瑁呰浇鍙橀噺鐨勬棫鍊硷紝鍦ㄥ瘎瀛樺櫒涓 鍊硷紝鍥炲啓銆備粬浠 啓鎿嶄綔閲嶅彔浜嗭紝瀵艰嚧鍙橀噺鍊间粎澧炲姞浜嗕竴娆??傚緢鏄庢樉锛岃 闂 簲璇ヤ覆琛屽寲锛欰鎵ц 123姝ラ 鏃朵笉搴旇 鎵撴柇銆備娇杩欎釜绫绘垚涓虹嚎绋嬪畨鍏ㄧ殑鏈?绠?鍗曟柟娉曟槸浣跨敤QMutex鏉ヤ繚鎶ゆ暟鎹 垚鍛橈細 class Counter { public: Counter() { n = 0; } void increment() { QMutexLocker locker(&mutex); ++n; } void decrement() { QMutexLocker locker(&mutex); --n; } int value() const { QMutexLocker locker(&mutex); return n; } private: mutable QMutex mutex; int n; }; QMutexLocker绫诲湪鏋勯?犲嚱鏁颁腑鑷 姩瀵筸utex杩涜 鍔犻攣锛屽湪鏋愭瀯鍑芥暟涓 繘琛岃В閿併?傞殢渚夸竴鎻愮殑鏄 紝mutex浣跨敤浜唌utable鍏抽敭瀛楁潵淇 グ锛屽洜涓烘垜浠 湪value()鍑芥暟涓 mutex杩涜 鍔犻攣涓庤В閿佹搷浣滐紝鑰寁alue()鏄 竴涓猚onst鍑芥暟銆? 澶у 鏁癚t绫绘槸鍙 噸鍏ワ紝闈炵嚎绋嬪畨鍏ㄧ殑銆傛湁涓?浜涚被涓庡嚱鏁版槸绾跨?瀹夊叏鐨勶紝瀹冧滑涓昏 鏄 嚎绋嬬浉 鍏崇殑绫伙紝濡俀Mutex,QCoreApplication::postEvent()銆? 绾跨?涓嶲Objects QThread 缁ф壙鑷猀Object,瀹冨彂灏勪俊鍙蜂互鎸囩ず绾跨?鎵ц 寮?濮嬩笌缁撴潫锛岃?屼笖涔熸彁渚涗簡璁稿 slots銆傛洿鏈夎叮鐨勬槸锛孮Objects鍙 互鐢ㄤ簬澶氱嚎绋嬶紝杩欐槸鍥犱负姣忎釜绾跨?琚 厑璁告湁瀹冭嚜宸辩殑浜嬩欢寰 幆銆? QObject 鍙 噸鍏ユ?? QObject鏄 彲閲嶅叆鐨勩?傚畠鐨勫ぇ澶氭暟闈濭UI瀛愮被锛屽儚QTimer,QTcpSocket,QUdpSocket,QHttp,QFtp,QProcess涔熸槸鍙 噸鍏ョ殑锛屽湪澶氫釜绾跨?涓 悓鏃朵娇鐢ㄨ繖浜涚被鏄 彲鑳界殑銆傞渶瑕佹敞鎰忕殑鏄 紝杩欎簺绫昏 璁捐 鎴愬湪涓?涓 崟绾跨?涓 垱寤轰笌浣跨敤锛屽洜姝わ紝鍦ㄤ竴涓 嚎绋嬩腑鍒涘缓涓?涓 璞?紝鑰屽湪鍙， 鐨勭嚎绋嬩腑璋冪敤瀹冪殑鍑芥暟锛岃繖鏍风殑琛屼负涓嶈兘淇濊瘉宸ヤ綔鑹 ソ銆傛湁涓夌 绾,潫闇?瑕佹敞鎰忥細 1锛孮Object鐨勫 瀛愭?绘槸搴旇 鍦ㄥ畠鐖朵翰琚 垱寤虹殑閭,釜绾跨?涓 垱寤恒?傝繖鎰忓懗鐫?锛屼綘缁濅笉搴旇 浼犻?扱Thread瀵硅薄浣滀负鍙，竴涓 璞,殑鐖朵翰(鍥犱负QThread瀵硅薄鏈 韩浼氬湪鍙，竴涓 嚎绋嬩腑琚 垱寤? 2,浜嬩欢椹卞姩瀵硅薄浠呬粎鍦ㄥ崟绾跨?涓 娇鐢ㄣ?傛槑纭 湴璇达紝杩欎釜瑙勫垯閫傜敤浜?瀹氭椂鍣ㄦ満鍒垛?滀笌鈥濈綉鏍兼ā鍧椻?滐紝涓句緥鏉ヨ 锛屼綘涓嶅簲璇ュ湪涓?涓 嚎绋嬩腑寮?濮嬩竴涓 畾鏃跺櫒鎴栨槸杩炴帴涓?涓 鎺ュ瓧锛屽綋杩欎釜绾跨?涓嶆槸杩欎簺瀵硅薄鎵?鍦ㄧ殑绾跨?銆? 3锛屼綘蹇呴』淇濊瘉鍦ㄧ嚎绋嬩腑鍒涘缓鐨勬墍鏈夊 璞″湪浣犲垹闄 Thread鍓嶈 鍒犻櫎銆傝繖寰堝 鏄撳仛鍒?浣犲彲浠 un()鍑芥暟杩愯 鐨勬爤涓婂垱寤哄 璞??? 灏界 QObject鏄 彲閲嶅叆鐨勶紝浣咷UI绫伙紝鐗瑰埆鏄疩Widget涓庡畠鐨勬墍鏈夊瓙绫婚兘鏄 笉鍙 噸鍏ョ殑銆傚畠浠 粎鐢ㄤ簬涓荤嚎绋嬨?傛 濡傚墠闈?彁鍒拌繃鐨勶紝QCoreApplication::exec()涔熷繀椤讳粠閭,釜绾跨?涓 璋冪敤銆傚疄璺典笂锛屼笉浼氬湪鍒 殑绾跨?涓 娇鐢?UI绫伙紝瀹冧滑宸ヤ綔鍦ㄤ富绾跨?涓婏紝鎶婁竴浜涜?楁椂鐨勬搷浣滄斁鍏ョ嫭绔嬬殑宸ヤ綔绾跨?涓 紝褰撳伐浣滅嚎绋嬭繍琛屽畬鎴愶紝鎶婄粨鏋滃湪涓荤嚎绋嬫墍鎷ユ湁鐨勫睆骞曚笂鏄剧ず銆? 閫愮嚎绋嬩簨浠跺惊鐜? 姣忎釜绾跨?鍙 互鏈夊畠鐨勪簨浠跺惊鐜 紝鍒濆 绾跨?寮?濮嬪畠鐨勪簨浠跺惊鐜 渶浣跨敤QCoreApplication::exec(),鍒 殑绾跨?寮?濮嬪畠鐨勪簨浠跺惊鐜 渶瑕佺敤QThread::exec(). 鍍廞CoreApplication涓?鏍凤紝QThreadr鎻愪緵浜唀xit(int)鍑芥暟锛屼竴涓猶uit() slot銆? 绾跨?涓 殑浜嬩欢寰 幆锛屼娇寰楃嚎绋嬪彲浠ヤ娇鐢ㄩ偅浜涢渶瑕佷簨浠跺惊鐜 殑闈濭UI 绫?濡傦紝 QTimer,QTcpSocket,QProcess)銆備篃鍙 互鎶婁换浣曠嚎绋嬬殑signals杩炴帴鍒扮壒瀹氱嚎绋嬬殑slots锛屼篃灏辨槸璇翠俊鍙?妲芥満鍒舵槸鍙 互璺ㄧ嚎绋嬩娇鐢ㄧ殑銆傚 浜庡湪QApplication涔嬪墠鍒涘缓鐨勫 璞?紝QObject::thread()杩斿洖0,杩欐剰鍛崇潃涓荤嚎绋嬩粎涓鸿繖浜涘 璞″ 鐞嗘姇閫掍簨 浠讹紝涓嶄細涓烘病鏈夋墍灞炵嚎绋嬬殑瀵硅薄澶勭悊鍙， 鐨勪簨浠躲?傚彲浠ョ敤QObject::moveToThread()鏉ユ敼鍙樺畠鍜屽畠瀛?瓙浠 殑绾跨?浜茬紭鍏崇郴锛屽亣濡傚 璞?湁鐖朵翰锛屽畠涓嶈兘绉诲姩杩欑 鍏崇郴銆傚湪鍙，竴涓 嚎绋?鑰屼笉鏄 垱寤哄畠鐨勯偅涓 嚎绋?涓璬elete QObject瀵硅薄鏄 笉瀹夊叏鐨勩?傞櫎闈炰綘鍙 互淇濊瘉鍦ㄥ悓涓?鏃跺埢瀵硅薄涓嶅湪澶勭悊浜嬩欢銆傚彲浠ョ敤QObject::deleteLater(),瀹冧細鎶曢?掍竴涓狣eferredDelete浜嬩欢锛岃繖浼氳 瀵硅薄绾跨?鐨勪簨浠跺惊鐜 渶缁堥?夊彇鍒般?? 鍋囧 娌?湁浜嬩欢寰 幆杩愯 锛屼簨浠朵笉浼氬垎鍙戠粰瀵硅薄銆備妇渚嬫潵璇达紝鍋囧 浣犲湪涓?涓 嚎绋嬩腑鍒涘缓浜嗕竴涓猀Timer瀵硅薄锛屼絾浠庢病鏈夎皟鐢ㄨ繃exec(),閭,箞QTimer灏变笉浼氬彂灏勫畠鐨則imeout()淇″彿.瀵筪eleteLater()涔熶笉浼氬伐浣溿??杩欏悓鏍烽?傜敤浜庝富绾跨?)銆備綘鍙 互鎵嬪伐浣跨敤绾跨?瀹夊叏鐨勫嚱鏁癚 CoreApplication::postEvent()锛屽湪浠讳綍鏃跺?欙紝缁欎换浣曠嚎绋嬩腑鐨勪换浣曞 璞?姇閫掍竴涓 簨浠讹紝浜嬩欢浼氬湪閭,釜鍒涘缓浜嗗 璞,殑绾跨?涓 ?氳繃浜嬩欢寰 幆娲惧彂銆備簨浠惰繃婊ゅ櫒鍦ㄦ墍鏈夌嚎绋嬩腑涔熻 鏀 寔锛屼笉杩囧畠闄愬畾琚 洃瑙嗗 璞′笌鐩戣 瀵硅薄鐢熷瓨鍦ㄥ悓涓?绾跨?涓 ?傜被浼煎湴锛孮CoreApplication::sendEvent(涓嶆槸postEvent()),浠呯敤浜庡湪璋冪敤姝ゅ嚱鏁扮殑绾跨?涓 悜鐩 爣瀵硅薄鎶曢?掍簨浠躲?? 浠庡埆鐨勭嚎绋嬩腑璁块棶QObject瀛愮被 QObject鍜屾墍鏈夊畠鐨勫瓙绫绘槸闈炵嚎绋嬪畨鍏ㄧ殑銆傝繖鍖呮嫭鏁翠釜鐨勪簨浠舵姇閫掔郴缁熴?傞渶瑕佺墷璁扮殑鏄 紝褰撲綘姝,粠鍒 殑绾跨?涓 闂 璞?椂锛屼簨浠跺惊鐜 彲浠ュ悜浣犵殑QObject瀛愮被鎶曢?掍簨浠躲?傚亣濡備綘璋冪敤涓?涓 笉鐢熷瓨鍦ㄥ綋鍓嶇嚎绋嬩腑鐨凲Object瀛愮被鐨勫嚱鏁版椂 锛屼綘蹇呴』鐢?utex鏉ヤ繚鎶 Object瀛愮被鐨勫唴閮ㄦ暟鎹 紝鍚，垯浼氶伃閬囩伨闅炬垨闈為 鏈熺粨鏋溿?傚儚鍏跺畠鐨勫 璞′竴鏍凤紝QThread瀵硅薄鐢熷瓨鍦ㄥ垱寤哄畠鐨勯偅涓 嚎绋嬩腑---涓嶆槸褰換Thread::run()琚 皟鐢ㄦ椂鍒涘缓鐨勯偅涓 嚎绋嬨?備竴鑸 潵璁诧紝鍦ㄤ綘鐨凲Thread瀛愮被涓 彁渚泂lots鏄 笉瀹夊叏鐨勶紝闄ら潪浣犵敤mutex淇濇姢浜嗕綘鐨勬垚鍛樺彉閲忋?? 鍙，竴鏂归潰锛屼綘鍙 互瀹夊叏鐨勪粠QThread::run()鐨勫疄鐜颁腑鍙戝皠淇″彿锛屽洜涓轰俊鍙峰彂灏勬槸绾跨?瀹夊叏鐨勩?? 璺ㄧ嚎绋嬬殑淇″彿-妲? Qt鏀 寔涓夌 绫诲瀷鐨勪俊鍙?妲借繛鎺ワ細 1锛岀洿鎺ヨ繛鎺ワ紝褰搒ignal鍙戝皠鏃讹紝slot绔嬪嵆璋冪敤銆傛 slot鍦ㄥ彂灏剆ignal鐨勯偅涓 嚎绋嬩腑琚 墽琛?涓嶄竴瀹氭槸鎺ユ敹瀵硅薄鐢熷瓨鐨勯偅涓 嚎绋? 2锛岄槦鍒楄繛鎺ワ紝褰撴帶鍒舵潈鍥炲埌瀵硅薄灞炰簬鐨勯偅涓 嚎绋嬬殑浜嬩欢寰 幆鏃讹紝slot琚 皟鐢ㄣ?傛 slot鍦ㄦ帴鏀跺 璞,敓瀛樼殑閭,釜绾跨?涓 鎵ц 3锛岃嚜鍔ㄨ繛鎺?缂虹渷)锛屽亣濡備俊鍙峰彂灏勪笌鎺ユ敹鑰呭湪鍚屼竴涓 嚎绋嬩腑锛屽叾琛屼负濡傜洿鎺ヨ繛鎺ワ紝鍚，垯锛屽叾琛屼负濡傞槦鍒楄繛鎺ャ?? 杩炴帴绫诲瀷鍙 兘閫氳繃浠ュ悜connect()浼犻?掑弬鏁版潵鎸囧畾銆傛敞鎰忕殑鏄 紝褰撳彂閫佽?呬笌鎺ユ敹鑰呯敓瀛樺湪涓嶅悓鐨勭嚎绋嬩腑锛岃?屼簨浠跺惊鐜 杩愯 浜庢帴鏀惰?呯殑绾跨?涓 紝浣跨敤鐩存帴杩炴帴鏄 笉瀹夊叏鐨勩?傚悓鏍风殑閬撶悊锛岃皟鐢ㄧ敓瀛樺湪涓嶅悓鐨勭嚎绋嬩腑鐨勫 璞,殑鍑芥暟涔熸槸涓嶆槸瀹夊叏鐨勩?俀Object::connect()鏈 韩鏄 嚎绋嬪畨鍏ㄧ殑銆? 澶氱嚎绋嬩笌闅愬惈鍏变韩 Qt涓哄畠鐨勮 澶氬?肩被鍨嬩娇鐢ㄤ簡鎵?璋撶殑闅愬惈鍏变韩(implicit sharing)鏉ヤ紭鍖栨?ц兘銆傚師鐞嗘瘮杈冪畝鍗曪紝鍏变韩绫诲寘鍚 竴涓 寚鍚戝叡浜 暟鎹 潡鐨勬寚閽堬紝杩欎釜鏁版嵁鍧椾腑鍖呭惈浜嗙湡姝,師鏁版嵁涓庝竴涓 紩鐢ㄨ 鏁般?傛妸娣辨嫹璐濊浆鍖栦负涓?涓 祬鎷疯礉锛屼粠鑰屾彁楂樹簡鎬ц兘銆傝繖绉嶆満鍒跺湪骞曞悗鍙戠敓浣滅敤锛岀?搴忓憳涓嶉渶瑕佸叧蹇冨畠銆傚 鏋滄繁鍏ョ偣鐪嬶紝鍋囧 瀵硅薄闇?瑕佸 鏁版嵁杩涜 淇 敼锛岃?屽紩鐢ㄨ 鏁板ぇ浜?锛岄偅涔堝畠搴旇 鍏坉etach()銆備互浣垮緱瀹冧慨鏀逛笉浼氬 鍒 殑鍏变韩鑰呬骇鐢熷奖鍝嶏紝鏃?劧淇 敼鍚庣殑鏁版嵁涓庡師鏉ョ殑閭,唤鏁版嵁涓嶅悓浜嗭紝鍥犳 涓嶅彲鑳藉啀鍏变韩浜嗭紝浜庢槸瀹冨厛鎵ц 娣辨嫹璐濓紝鎶婃暟鎹 彇鍥炴潵锛屽啀鍦ㄨ繖浠芥暟鎹 笂杩涜 淇 敼銆備緥濡傦細 void QPen::setStyle(Qt::PenStyle style) { detach(); // detach from common data d->style = style; // set the style member } void QPen::detach() { if (d->ref != 1) { ... // perform a deep copy } } 涓?鑸 涓猴紝闅愬惈鍏变韩涓庡 绾跨?涓嶅お鍜岃皭锛屽洜涓烘湁寮曠敤璁?暟鐨勫瓨鍦ㄣ?傚 寮曠敤璁?暟杩涜 淇濇姢鐨勬柟娉曚箣涓?鏄 娇鐢?utex,浣嗗畠寰堟參锛孮t鏃?湡鐗堟湰娌?湁鎻愪緵涓?涓 弧鎰忕殑瑙,喅鏂规 銆備粠4.0寮?濮嬶紝闅愬惈鍏变韩绫诲彲浠ュ畨鍏ㄥ湴璺ㄧ嚎绋嬫嫹璐濓紝濡傚悓鍒 殑鍊肩被鍨嬩竴鏍枫?傚畠浠 槸瀹屽叏鍙 噸鍏ョ殑銆傞殣鍚 叡浜 湡鐨勬槸"implicit"銆傚畠浣跨敤姹囩紪璇 ?瀹炵幇浜嗗師瀛愭?у紩鐢ㄨ 鏁版搷浣滐紝杩欐瘮鐢?utex蹇 浜嗐?? 鍋囧 浣犲湪澶氫釜绾跨?涓 悓杩涜 闂 浉鍚屽 璞?紝浣犱篃闇?瑕佺敤mutex鏉ヤ覆琛屽寲璁块棶椤哄簭,灏卞 鍚屽叾浠栧彲閲嶅叆瀵硅薄閭,牱銆傛?荤殑鏉ヨ 锛岄殣鍚 叡浜 湡鐨勭粰鈥濋殣鍚 ?滄帀浜嗭紝鍦ㄥ 绾跨?绋嬪簭涓 紝浣犲彲浠ユ妸瀹冧滑鐪嬫垚鏄 竴鑸 殑锛岄潪鍏变韩鐨勶紝鍙 噸鍏ョ殑绫诲瀷锛岃繖绉嶅仛娉曟槸瀹夊叏鐨勩?? 鍒嗙被: Qt