From 26fbe7f1e68bb0c96da32491efcf3696fe6c299b Mon Sep 17 00:00:00 2001 From: Holger Weiss Date: Mon, 19 Aug 2013 23:27:12 +0200 Subject: Sync with the latest Gnulib code (6f2d632) --- gl/getdtablesize.c | 63 ------------------------------------------------------ 1 file changed, 63 deletions(-) delete mode 100644 gl/getdtablesize.c (limited to 'gl/getdtablesize.c') diff --git a/gl/getdtablesize.c b/gl/getdtablesize.c deleted file mode 100644 index a565a2de..00000000 --- a/gl/getdtablesize.c +++ /dev/null @@ -1,63 +0,0 @@ -/* getdtablesize() function for platforms that don't have it. - Copyright (C) 2008-2010 Free Software Foundation, Inc. - Written by Bruno Haible , 2008. - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . */ - -#include - -/* Specification. */ -#include - -#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ - -#include - -/* Cache for the previous getdtablesize () result. */ -static int dtablesize; - -int -getdtablesize (void) -{ - if (dtablesize == 0) - { - /* We are looking for the number N such that the valid file descriptors - are 0..N-1. It can be obtained through a loop as follows: - { - int fd; - for (fd = 3; fd < 65536; fd++) - if (dup2 (0, fd) == -1) - break; - return fd; - } - On Windows XP, the result is 2048. - The drawback of this loop is that it allocates memory for a libc - internal array that is never freed. - - The number N can also be obtained as the upper bound for - _getmaxstdio (). _getmaxstdio () returns the maximum number of open - FILE objects. The sanity check in _setmaxstdio reveals the maximum - number of file descriptors. This too allocates memory, but it is - freed when we call _setmaxstdio with the original value. */ - int orig_max_stdio = _getmaxstdio (); - unsigned int bound; - for (bound = 0x10000; _setmaxstdio (bound) < 0; bound = bound / 2) - ; - _setmaxstdio (orig_max_stdio); - dtablesize = bound; - } - return dtablesize; -} - -#endif -- cgit v1.2.3-74-g34f1