compat/fdsetsize.h

Go to the documentation of this file.
00001 #ifndef SQUID_FDSETSIZE_H
00002 #define SQUID_FDSETSIZE_H
00003 
00004 /****************************************************************************
00005  *--------------------------------------------------------------------------*
00006  * DO *NOT* MAKE ANY CHANGES below here unless you know what you're doing...*
00007  *--------------------------------------------------------------------------*
00008  ****************************************************************************/
00009 
00010 /* FD_SETSIZE must be redefined before including sys/types.h */
00011 #if 0
00012 /* AYJ: would dearly like to use this to enforce include order
00013     but at present some helpers don't follow the squid include methodology.
00014     that will need fixing later.
00015 */
00016 #ifdef _SYS_TYPES_H
00017 #error squid_fdsetsize.h for FDSETSIZE must be included before sys/types.h
00018 #error Make sure that squid.h or config.h is the first file included by your .cc
00019 #endif
00020 #endif /* 0 */
00021 /*
00022  * On some systems, FD_SETSIZE is set to something lower than the
00023  * actual number of files which can be opened.  IRIX is one case,
00024  * NetBSD is another.  So here we increase FD_SETSIZE to our
00025  * configure-discovered maximum *before* any system includes.
00026  */
00027 #define CHANGE_FD_SETSIZE 1
00028 
00029 /*
00030  * Cannot increase FD_SETSIZE on Linux, but we can increase __FD_SETSIZE
00031  * with glibc 2.2 (or later? remains to be seen). We do this by including
00032  * bits/types.h which defines __FD_SETSIZE first, then we redefine
00033  * __FD_SETSIZE. Ofcourse a user program may NEVER include bits/whatever.h
00034  * directly, so this is a dirty hack!
00035  */
00036 #if _SQUID_LINUX_ || _SQUID_KFREEBSD_
00037 #undef CHANGE_FD_SETSIZE
00038 #define CHANGE_FD_SETSIZE 0
00039 #include <features.h>
00040 #if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
00041 #if SQUID_MAXFD > DEFAULT_FD_SETSIZE
00042 #include <bits/types.h>
00043 #if HAVE_LINUX_POSIX_TYPES_H
00044 #include <linux/posix_types.h>
00045 #endif
00046 #undef __FD_SETSIZE
00047 #define __FD_SETSIZE SQUID_MAXFD
00048 #endif
00049 #endif
00050 #endif
00051 
00052 /*
00053  * Cannot increase FD_SETSIZE on FreeBSD before 2.2.0, causes select(2)
00054  * to return EINVAL.
00055  * --Marian Durkovic <marian@svf.stuba.sk>
00056  * --Peter Wemm <peter@spinner.DIALix.COM>
00057  */
00058 #if _SQUID_FREEBSD_
00059 #include <osreldate.h>
00060 #if __FreeBSD_version < 220000
00061 #undef CHANGE_FD_SETSIZE
00062 #define CHANGE_FD_SETSIZE 0
00063 #endif
00064 #endif
00065 
00066 /*
00067  * Trying to redefine CHANGE_FD_SETSIZE causes a slew of warnings
00068  * on Mac OS X Server.
00069  */
00070 #if _SQUID_APPLE_
00071 #undef CHANGE_FD_SETSIZE
00072 #define CHANGE_FD_SETSIZE 0
00073 #endif
00074 
00075 /* Increase FD_SETSIZE if SQUID_MAXFD is bigger */
00076 #if CHANGE_FD_SETSIZE && SQUID_MAXFD > DEFAULT_FD_SETSIZE
00077 #define FD_SETSIZE SQUID_MAXFD
00078 #endif
00079 
00080 
00081 /*
00082  * Trap unintentional use of fd_set. Must not be used outside the
00083  * select code as it only supports FD_SETSIZE number of filedescriptors
00084  * and Squid may be running with a lot more..
00085  * But only for code linked into Squid, not the helpers.. (unlinkd, pinger)
00086  */
00087 #ifdef SQUID_FDSET_NOUSE
00088 # ifndef SQUID_HELPER
00089 #  define fd_set ERROR_FD_SET_USED
00090 # endif
00091 #endif
00092 
00093 #endif /* SQUID_FDSETSIZE_H */
squid-cache.org

Optimising Web Delivery

compat/fdsetsize.h

Search

Introduction

Documentation

Support

Miscellaneous

Web Site Translations

Mirrors
