how to intilise a non blocking socket?

sorry guys for asking this stupid question but i cant find anything like how to intilise a non blocking all stuff i searched on google says some junk stuff and no code for it it would be great if someone showed a simple code with use of non blocking on it thanks .

You can use fcntl() to change a socket to be blocking or nonblocking.

Code:

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result = fcntl(sck, F_GETFL, NULL);
//This sets the socket to nonblocking
result |= O_NONBLOCK;

---

Code:

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result = fcntl(sck, F_GETFL, NULL);
//This sets the socket to blocking
result &= (~O_NONBLOCK);

---

Might also be a good idea to check if result < 0 from the call to fcntl, which indicates an error.

Edit: This is after you have actually created the socket (sck = socket())

yes but i think that function is linux right ?not win?

So sorry, just making blind assumptions.

I think the equivalent would be basically the same thing but using ioctlsocket() with a FIONBIO flag.

msdn:

Code:

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//-------------------------
// Set the socket I/O mode: In this case FIONBIO
// enables or disables the blocking mode for the
// socket based on the numerical value of iMode.
// If iMode = 0, blocking is enabled;
// If iMode != 0, non-blocking mode is enabled.
u_long iMode = 0;
ioctlsocket(m_socket, FIONBIO, &iMode);

---

Note that winsock is almost a direct clone of the BSD sockets library, which is what Linux uses . . .

Quote:

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Originally Posted by carrotcake1029

So sorry, just making blind assumptions.

I think the equivalent would be basically the same thing but using ioctlsocket() with a FIONBIO flag.

msdn:

Code:

---

//-------------------------
// Set the socket I/O mode: In this case FIONBIO
// enables or disables the blocking mode for the
// socket based on the numerical value of iMode.
// If iMode = 0, blocking is enabled;
// If iMode != 0, non-blocking mode is enabled.
u_long iMode = 0;
ioctlsocket(m_socket, FIONBIO, &iMode);

---

---

then i can make connect normal ?

anyways let me post my problem code in other thread . thanks for the help guys.

oh i forgot WSAstartup stupid me :D