select.h File Reference

#include <sys/types.h>
#include <sys/time.h>

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Functions
int	select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
	POSIX select().

Detailed Description

Copyright

Copyright (c) 2015, Stuart W Baker All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

This file imlements POSIX select() prototypes.

Author

Stuart W. Baker

Date

26 January 2015

Definition in file esp8266/sys/select.h.

Function Documentation

select()

int select	(	int	nfds,
		fd_set *	readfds,
		fd_set *	writefds,
		fd_set *	exceptfds,
		struct timeval *	timeout
	)

POSIX select().

Parameters

nfds	highest numbered file descriptor in any of the three, sets plus 1
readfds	fd_set of file descritpors to pend on read active
writefds	fd_set of file descritpors to pend on write active
exceptfds	fd_set of file descritpors to pend on error active
timeout	timeout value to wait, if 0, return immediately, if NULL wait forever

Returns

on success, number of file descriptors in the three sets that are active, 0 on timeout, -1 with errno set appropriately upon error.

Definition at line 473 of file Fileio.cxx.