[問題] Thread and Event的疑惑

看板C_and_CPP作者QQ29 (我愛阿蓉)時間15年前 (2010/06/08 12:12)推噓3(3推 0噓 4→)

留言7則, 3人參與討論串1/2 (看更多)

http://msdn.microsoft.com/en-us/library/ms686915(v=VS.85).aspx 這是關於使用event object的範例讓我不解的是他開4條thread 但是他卻只有一次的setEvent 假設說這四條thread同時都卡在 WaitForSingleObject 當event signal了同時這四條應該要會一起有權力跑switch 印這些字串但很怪的是他event是設定manual-reset 所以應該setEvent後就永遠是signal了但是他印的這些字串卻完全不會交錯我預期他會印Thread %d reading from buffer 可能會變成ThThread xxxx readreing之類的字串沒印完就換人印但事實上我跑這段完全不會有這現象.....讓我不解於是我把code改為 printf("Thread %d reading from buffer\n", GetCurrentThreadId()); printf("Thread %d reading from buffer2\n", GetCurrentThreadId()); printf("Thread %d reading from buffer3\n", GetCurrentThreadId()); 故意印3行結果會變成 Thread 4592 reading from buffer Main thread waiting for threads to exit... Thread 5752 reading from buffer Thread 5580 reading from buffer Thread 3568 reading from buffer Thread 4592 reading from buffer2 Thread 5752 reading from buffer2 Thread 5580 reading from buffer2 Thread 3568 reading from buffer2 Thread 4592 reading from buffer3 Thread 5752 reading from buffer3 Thread 5580 reading from buffer3 Thread 3568 reading from buffer3 完全不會被中斷但我自己覺得大家都有權利跑switch那段應該要交錯印才是阿還是我對WaitForSingleObject有誤會... 請有經驗的版友指點迷津實在想不透謝謝! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 219.87.64.222

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ilovebbs

06/08 16:36, , 1^F

06/08 16:36, 1^F

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QQ29

06/08 18:49, , 2^F

06/08 18:49, 2^F

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aecho

06/08 20:11, , 3^F

06/08 20:11, 3^F