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Top Forums Programming sockets - can you send data while waiting on select() Post 302526473 by expl on Tuesday 31st of May 2011 03:33:23 PM
Old 05-31-2011
recv() is capable to timeout as it uses select syscall internally and timeout is configured with setsockopt(), putting one more select call in front just adds overhead.
 

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explain_select_or_die(3)				     Library Functions Manual					  explain_select_or_die(3)

NAME
explain_select_or_die - blah blah and report errors SYNOPSIS
#include <libexplain/select.h> void explain_select_or_die(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout); DESCRIPTION
The explain_select_or_die function is used to call the select(2) system call. On failure an explanation will be printed to stderr, obtained from explain_select(3), and then the process terminates by calling exit(EXIT_FAILURE). This function is intended to be used in a fashion similar to the following example: explain_select_or_die(nfds, readfds, writefds, exceptfds, timeout); nfds The nfds, exactly as to be passed to the select(2) system call. readfds The readfds, exactly as to be passed to the select(2) system call. writefds The writefds, exactly as to be passed to the select(2) system call. exceptfds The exceptfds, exactly as to be passed to the select(2) system call. timeout The timeout, exactly as to be passed to the select(2) system call. Returns: This function only returns on success. On failure, prints an explanation and exits. SEE ALSO
select(2) blah blah explain_select(3) explain select(2) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2008 Peter Miller explain_select_or_die(3)
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