Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for
4/8/2010

This structure is used by various Windows Sockets functions and service providers, such as the selectfunction, to place sockets into a set for various purposes. For example, the readfdsparameter of the selectfunction can be used for testing a socket for readability.

Syntax 

typedef struct fd_set {
  u_int 
fd_count;
  SOCKET 
fd_array[FD_SETSIZE];
} fd_set;

Members

fd_count

Number of sockets in the set.

fd_array

Array of sockets that are in the set.

Requirements

Header winsock2.h
Windows Embedded CE Windows CE .NET 4.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also