FD_SET trouble using winsock.

antex · 04-03-2007, 10:30 AM

I find this kind of strange but when I use the FD_SET macro in my program everything compiles fine but when I run the executable it crashes.

Code:

SOCKET test;
fd_set read_check;

FD_SET(test, &read_check);

Any suggestions why this happens ?

EDIT: I'm using the mingw c/c++ compilers and Code::Blocks.

**Salem** · 04-03-2007, 02:40 PM

Did you initialise the socket variable test?
Did you FD_ZERO the set before using it?

antex · 04-04-2007, 12:34 AM

I thought I did, but when I created a new project just for testing it all worked perfectly. The trouble is in a socket class I'm writing so I have to double check the class code it seems.

If it wasn't for your reply I would not have checked this because I was absolutely sertain I had initialized the socket and also FD_ZERO the set. Thank you!

04-03-2007, 10:30 AM	#1
antex Registered User Join Date: Sep 2004 Posts: 78	FD_SET trouble using winsock. I find this kind of strange but when I use the FD_SET macro in my program everything compiles fine but when I run the executable it crashes. Code: SOCKET test; fd_set read_check; FD_SET(test, &read_check); Any suggestions why this happens ? EDIT: I'm using the mingw c/c++ compilers and Code::Blocks.
antex is offline

04-03-2007, 02:40 PM	#2
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,693	Did you initialise the socket variable test? Did you FD_ZERO the set before using it? __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

04-04-2007, 12:34 AM	#3
antex Registered User Join Date: Sep 2004 Posts: 78	I thought I did, but when I created a new project just for testing it all worked perfectly. The trouble is in a socket class I'm writing so I have to double check the class code it seems. If it wasn't for your reply I would not have checked this because I was absolutely sertain I had initialized the socket and also FD_ZERO the set. Thank you!
antex is offline

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