select return
On success, select() and pselect() return the number of file descriptors contained in the three returned descriptor sets. So if only one file descriptor triggers the ... ,if (select(nfds, readfds, writefds, exceptfds, timeout) < 0) fprintf(stderr, "%s-n", ... Note: This function is not thread safe, because it shares a return buffer across all ...
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 select return 相關參考資料
7.2. select()：同步IO 多工- Beej's Guide to Network Programming 正體 ...
select() 授予你同時監視多個sockets 的權力，它會告訴你哪些sockets 已經有 ..... file descriptors } // END for( ; ; )--and you thought it would never end! return 0; } http://beej-zhtw.netdpi.net c select() function always return 1 - Stack Overflow
On success, select() and pselect() return the number of file descriptors contained in the three returned descriptor sets. So if only one file descriptor triggers the ... https://stackoverflow.com explain_select(3): explain select errors - Linux man page
if (select(nfds, readfds, writefds, exceptfds, timeout) < 0) fprintf(stderr, "%s-n", ... Note: This function is not thread safe, because it shares a return buffer across all ... https://linux.die.net How to return result of a SELECT inside a function in PostgreSQL ...
Use RETURN QUERY : CREATE OR REPLACE FUNCTION word_frequency(_max_tokens int) RETURNS TABLE ( txt text -- visible as OUT parameter inside ... https://stackoverflow.com Re: [問題] select read & write同一fd - 看板C_and_CPP - 批踢踢實業坊
因為我不懂select是用什麼去判別資料是否準備好: 還請各位先進指點一番，謝謝給你看我很久以前寫的/** @brief 更新socket的狀態@return 是否 ... https://www.ptt.cc RETURN (Transact-SQL) - Microsoft Docs
當搭配預存程序來使用時，RETURN 無法傳回Null 值。 ... PRINT 'You must give a user name' RETURN END ELSE BEGIN SELECT o.name, o.id, ... https://docs.microsoft.com select function | Microsoft Docs
跳到 Return Value - The select function returns the total number of socket handles that are ready and contained in the fd_set structures, zero if the time ... https://docs.microsoft.com Select()系統調用及文件描述符集fd_set的應用@ Bret. Blogger :: 痞客邦::
int select(int maxfd, fd_set *readfds, fd_set *writefds, fe_set *exceptfds, const .... return 1; /* 如果myset的所有元素都為0，說明FD (File descript)集為空，則函數 ... http://bkboy.pixnet.net select(2) - Linux manual page - man7.org
FD_ISSET() tests to see if a file descriptor is part of the set; this is useful after select() returns. nfds should be set to the highest-numbered file descriptor in any of ... http://man7.org select_tut(2) - Linux manual page - man7.org
select() (or pselect()) is used to efficiently monitor multiple file descriptors, ... A signal will cause the select() (or pse‐ lect()) call to return with errno set to EINTR. http://man7.org |