Mercurial > hg > xemacs-beta
view src/s/isc2-2.h @ 4499:eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
See http://shaver.off.net/diary/2008/05/25/fsyncers-and-curveballs/ for more
details.
2008-08-09 Aidan Kehoe <kehoea@parhasard.net>
Integrate Romain Francoise' 2005-09-14 (pre-GPLV3) GNU change,
which can allow much better performace with some stupid
filesystems:
* fileio.c (write_region_inhibit_fsync): New variable.
(Fwrite_region): Use it to skip call to fsync.
(syms_of_fileio): Initialize it.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Sat, 09 Aug 2008 16:44:46 +0200 |
parents | c69610198c35 |
children |
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/* Synched up with: FSF 19.31. */ /* system description file for Interactive (ISC) Unix version 2.2 on the 386. */ #include "usg5-3.h" /* select (in -linet) works okay on X ptys, but not on the serial port. karl@cs.umb.edu says that with that select call, subprocesses made by (e.g.) M-x grep don't exit cleanly, they just hang. Similar problems have been observed in ISC 3.0. */ #define BROKEN_SELECT_NON_X /* karl@cs.umb.edu says that ISC's socket support (in -linet) isn't what Emacs needs; it makes interrupt-shell-subjob and the like do nothing. But that appears to have been another manifestation of the broken select, so it should now be safe to define this again. */ #define HAVE_SOCKETS #define NO_SOCKETS_IN_FILE_SYSTEM #define NEED_NET_ERRNO_H /* This keeps the .cdbx section that gcc puts out when generating stabs-in-coff output, so Emacs can be debugged. --karl@cs.umb.edu. */ #define USG_SHARED_LIBRARIES #define NO_FCHMOD #define MAXNAMLEN 512 #define O_NDELAY O_NONBLOCK #define MEMORY_IN_STRING_H /* Tell gmalloc.c that we don't have memmove (system include files to the contrary!). */ #define MEMMOVE_MISSING /* -lPW is only needed if not using Gcc. We used to include -lcposix here for the rename function, but some people say ISC's rename doesn't work correctly with Emacs so we use Emacs' emulation instead. */ #if defined (__GNUC__) # define LIB_STANDARD_1 -lcposix #else /* !__GNUC__ */ # define LIB_STANDARD_1 -lPW #endif /* !__GNUC__ */ /* LIB_STANDARD_1 is used both here and in LIBS_SYSTEM (the latter for the sake of configure). */ #define LIB_STANDARD LIB_STANDARD_1 -lc #define NO_X_DESTROY_DATABASE /* -linet may be needed to avoid undefined symbols such as gethostname, inet_addr, gethostbyname, socket, connect, ... */ #define LIBS_SYSTEM -linet LIB_STANDARD_1 /* Inhibit asm code in netinet/in.h. Strictly speaking, only necessary when -traditional is being used, but it doesn't hurt to unconditionally define this. */ #define NO_ASM /* -traditional is not necessary if the system header files are fixed to define getc and putc in the absence of _POSIX_SOURCE. GCC's from 2.4.4 on do this. */ #if !defined (__GNUC__) || __GNUC__ < 2 # define C_SWITCH_SYSTEM "-traditional" #endif /* Some versions of ISC are said to define S_IFLNK even tho they don't really support symlinks. */ #undef S_IFLNK