[問題] 發現侯捷老師-多執行緒書中範例的一個問題

看板C_and_CPP (C/C++)作者ruthertw (魯塞)時間13年前 (2013/03/21 14:45)推噓0(0推 0噓 0→)

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開發平台(Platform): (Ex: VC++, GCC, Linux, ...) VC6 額外使用到的函數庫(Library Used): (Ex: OpenGL, ...) 書中範例-TASKQUEM 問題(Question)： console display多出一行餵入的資料(Input)： 6 threads 預期的正確結果(Expected Output)： Launched thread #1 (slot 0) Launched thread #2 (slot 1) Launched thread #3 (slot 2) Slot 0 idle Slot 0 terminated Launched thread #4 (slot 0) Slot 1 idle Slot 1 terminated Launched thread #5 (slot 1) Slot 2 idle Slot 2 terminated Launched thread #6 (slot 2) Slot 0 idle Slot 1 idle Slot 2 idle All slots terminated 錯誤結果(Wrong Output)： Launched thread #1 (slot 0) Launched thread #2 (slot 1) Launched thread #3 (slot 2) Slot 0 idle Slot 0 terminated Launched thread #4 (slot 0) ===> 應該只有一個 Launched thread #4 (slot 0) ===> 應該只有一個 Slot 1 idle Slot 1 terminated Launched thread #5 (slot 1) Slot 2 idle Slot 2 terminated Launched thread #6 (slot 2) Slot 0 idle Slot 1 idle Slot 2 idle All slots terminated 程式碼(Code)：(請善用置底文網頁, 記得排版) ... MTVERIFY( hThrds[slot] = CreateThread(NULL, 0, ThreadFunc, (LPVOID)slot, 0, &threadId ) ); printf("Launched thread #%d (slot %d)\n", i, slot); ... 範例程式碼可以從原作者的網站上下載下來 http://www.informit.com/store/multithreading-applications-in-win32-the-complete-guide-9780201442342 補充說明(Supplement)：剛compile好,第一次執行,出現此現像的機率超高, 之後大概要執行幾百次才可能會出現一次這個現像. -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.222.111.139