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git.ipfire.org Git - thirdparty/squid.git/blob - compat/fdsetsize.h
1 #ifndef SQUID_FDSETSIZE_H
2 #define SQUID_FDSETSIZE_H
4 /****************************************************************************
5 *--------------------------------------------------------------------------*
6 * DO *NOT* MAKE ANY CHANGES below here unless you know what you're doing...*
7 *--------------------------------------------------------------------------*
8 ****************************************************************************/
10 /* FD_SETSIZE must be redefined before including sys/types.h */
12 /* AYJ: would dearly like to use this to enforce include order
13 but at present some helpers don't follow the squid include methodology.
14 that will need fixing later.
17 #error squid_fdsetsize.h for FDSETSIZE must be included before sys/types.h
18 #error Make sure that squid.h is the first file included by your .cc
22 * On some systems, FD_SETSIZE is set to something lower than the
23 * actual number of files which can be opened. IRIX is one case,
24 * NetBSD is another. So here we increase FD_SETSIZE to our
25 * configure-discovered maximum *before* any system includes.
27 #define CHANGE_FD_SETSIZE 1
30 * Cannot increase FD_SETSIZE on Linux, but we can increase __FD_SETSIZE
31 * with glibc 2.2 (or later? remains to be seen). We do this by including
32 * bits/types.h which defines __FD_SETSIZE first, then we redefine
33 * __FD_SETSIZE. Ofcourse a user program may NEVER include bits/whatever.h
34 * directly, so this is a dirty hack!
36 #if _SQUID_LINUX_ || _SQUID_KFREEBSD_
37 #undef CHANGE_FD_SETSIZE
38 #define CHANGE_FD_SETSIZE 0
40 #if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
41 #if SQUID_MAXFD > DEFAULT_FD_SETSIZE
42 #include <bits/types.h>
43 #if HAVE_LINUX_POSIX_TYPES_H
44 #include <linux/posix_types.h>
47 #define __FD_SETSIZE SQUID_MAXFD
53 * Cannot increase FD_SETSIZE on FreeBSD before 2.2.0, causes select(2)
55 * --Marian Durkovic <marian@svf.stuba.sk>
56 * --Peter Wemm <peter@spinner.DIALix.COM>
59 #include <osreldate.h>
60 #if __FreeBSD_version < 220000
61 #undef CHANGE_FD_SETSIZE
62 #define CHANGE_FD_SETSIZE 0
67 * Trying to redefine CHANGE_FD_SETSIZE causes a slew of warnings
71 #undef CHANGE_FD_SETSIZE
72 #define CHANGE_FD_SETSIZE 0
75 /* Increase FD_SETSIZE if SQUID_MAXFD is bigger */
76 #if CHANGE_FD_SETSIZE && SQUID_MAXFD > DEFAULT_FD_SETSIZE
77 #define FD_SETSIZE SQUID_MAXFD
81 * Trap unintentional use of fd_set. Must not be used outside the
82 * select code as it only supports FD_SETSIZE number of filedescriptors
83 * and Squid may be running with a lot more..
84 * But only for code linked into Squid, not the helpers.. (unlinkd, pinger)
86 #ifdef SQUID_FDSET_NOUSE
88 # define fd_set ERROR_FD_SET_USED
92 #endif /* SQUID_FDSETSIZE_H */