socket non blocking
將socket 設定為non-blocking（非阻塞），你就能"poll（輪詢）" socket 以取得資訊。如果你試著讀取non-blocking socket，而socket 沒有資料時，函式就不會發生block，而是傳回-1，並將errno 設定為EWOULDBLOCK。 然而，一般來說，這樣polling 是不好的想法。如果你讓程式一直忙著查socket 上是否有資料，則會浪費CPU 的時間， ... , 近日學習用C++實作Socket Server與Client 端的程式，線上有許多Code都蠻完整的，但多數並非Non Blocking Socke., What do you mean by "not always reliable"? If the system succeeds in setting your socket non non-blocking, it will be non-blocking. Socket operations will return EWOULDBLOCK if they would block need to block (e.g. if the output buffer is full a, I think you're asking how to perform I/O on a non-blocking socket. Beej's guide has been around for a long time; it covers all this and more, with good code samples.,Blocking vs. non-blocking sockets. So far in this chapter, you've seen that select() can be used to detect when data is available to read from a socket. However, there are times when its useful to be able to call send(), recv(), connect(), accept(), e, 58 ServerSocketChannel server = (ServerSocketChannel) key.channel(); 59 // 等待client 連線 60 SocketChannel client = server.accept(); 61 // 連線後設定這個連線為non-blocking 62 client.configureBlocking(false); 63 // 這是一個echo server，連線後緊接著要收client 送來的訊息，所以註冊這個socket cha,NO 問題(Question)： 各位好請問我的server程式需要頻繁的呼叫send函式把資料送出去然後又是一個real-time的系統所以用blocking的socket的話會慢慢累積delay 最後就是崩潰資料全部過時搜尋了一下應該是要改用non-blocking的socket 於是我用int flags= fcntl(forwardSockfd, F_GETFL, 0); fcntl(forwardSockfd, ... ,A socket is in blocking mode when an I/O call waits for an event to complete. If the blocking mode is set for a socket, the calling program is suspended until the expected event completes. If nonblocking is set by the FCNTL() or IOCTL() calls, the calling, accept() blocks the caller until a connection is present. If no messages space is available at the socket to hold the message to be transmitted, then send() normally blocks. If no messages are available at the socket, the recv call waits for a message to,而那幾個名詞就是在這兩個步驟上有些許差異，blocking I/O是Linux socket programming的default行為. blocking I/O就是當你call了recvfrom之後，一定要等，等到收完才叫結束，然後recefrom的return value就是收進來多少，若是一直沒資料進來，你的process就會被卡死在那。 在講non-blocking之前，我們先講I/O multiplexing，常見 ...
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 socket non blocking 相關參考資料
7.1. Blocking（阻塞） - Beej's Guide to Network Programming 正體中文版
將socket 設定為non-blocking（非阻塞），你就能"poll（輪詢）" socket 以取得資訊。如果你試著讀取non-blocking socket，而socket 沒有資料時，函式就不會發生block，而是傳回-1，並將errno 設定為EWOULDBLOCK。 然而，一般來說，這樣polling 是不好的想法。如果你讓程式一直忙著查socket 上是否有資料... http://beej-zhtw.netdpi.net [C++]Non Blocking Socket (Server端) | 軟工Egan的學習筆記- 點部落
近日學習用C++實作Socket Server與Client 端的程式，線上有許多Code都蠻完整的，但多數並非Non Blocking Socke. https://dotblogs.com.tw c - How do I change a TCP socket to be non-blocking? - Stack Overflow
What do you mean by "not always reliable"? If the system succeeds in setting your socket non non-blocking, it will be non-blocking. Socket operations will return EWOULDBLOCK if they would b... https://stackoverflow.com Non-blocking client and server sockets in C - Stack Overflow
I think you're asking how to perform I/O on a non-blocking socket. Beej's guide has been around for a long time; it covers all this and more, with good code samples. https://stackoverflow.com Blocking vs. non-blocking sockets - Scott Klement
Blocking vs. non-blocking sockets. So far in this chapter, you've seen that select() can be used to detect when data is available to read from a socket. However, there are times when its useful to... https://www.scottklement.com 史帝芬心得筆記: NIO.2: TCP 網路程式設計(non-blocking)
58 ServerSocketChannel server = (ServerSocketChannel) key.channel(); 59 // 等待client 連線 60 SocketChannel client = server.accept(); 61 // 連線後設定這個連線為non-blocking 62 client.configureBlocking(false); 63 /... http://stevenitlife.blogspot.c [問題] non-blocking socket問題- 看板C_and_CPP - 批踢踢實業坊
NO 問題(Question)： 各位好請問我的server程式需要頻繁的呼叫send函式把資料送出去然後又是一個real-time的系統所以用blocking的socket的話會慢慢累積delay 最後就是崩潰資料全部過時搜尋了一下應該是要改用non-blocking的socket 於是我用int flags= fcntl(forwardSockfd, F_GETFL, 0); fcntl(fo... https://www.ptt.cc Clientserver socket programs: Blocking, nonblocking, and ... - IBM
A socket is in blocking mode when an I/O call waits for an event to complete. If the blocking mode is set for a socket, the calling program is suspended until the expected event completes. If nonblock... https://www.ibm.com How do I set a socket to be non-blocking? - Jim Fisher
accept() blocks the caller until a connection is present. If no messages space is available at the socket to hold the message to be transmitted, then send() normally blocks. If no messages are availa... https://jameshfisher.com IO Model | 菜鳥的三年成長史 - wirelessr - GitBook
而那幾個名詞就是在這兩個步驟上有些許差異，blocking I/O是Linux socket programming的default行為. blocking I/O就是當你call了recvfrom之後，一定要等，等到收完才叫結束，然後recefrom的return value就是收進來多少，若是一直沒資料進來，你的process就會被卡死在那。 在講non-blocking之前，我們先講I/O ... https://wirelessr.gitbooks.io |