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456b3c08b6
glibc/sysdeps/mach/hurd/bits
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Adhemerval Zanella 456b3c08b6 io: Refactor close_range and closefrom 
Now that Hurd implementis both close_range and closefrom (f2c996597d),
we can make close_range() a base ABI, and make the default closefrom()
implementation on top of close_range().

The generic closefrom() implementation based on __getdtablesize() is
moved to generic close_range().  On Linux it will be overriden by
the auto-generation syscall while on Hurd it will be a system specific
implementation.

The closefrom() now calls close_range() and __closefrom_fallback().
Since on Hurd close_range() does not fail, __closefrom_fallback() is an
empty static inline function set by__ASSUME_CLOSE_RANGE.

The __ASSUME_CLOSE_RANGE also allows optimize Linux
__closefrom_fallback() implementation when --enable-kernel=5.9 or
higher is used.

Finally the Linux specific tst-close_range.c is moved to io and
enabled as default.  The Linuxism and CLOSE_RANGE_UNSHARE are
guarded so it can be built for Hurd (I have not actually test it).

Checked on x86_64-linux-gnu, i686-linux-gnu, and with a i686-gnu
build.
2021-11-24 09:09:37 -03:00
..
types Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
errno.h hurd: Fix errno* generation 2018-10-31 10:32:39 +01:00
fcntl.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ioctls.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
local_lim.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
param.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
posix_opt.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
signum-arch.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
socket.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stat.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
statfs.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
statvfs.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sysmacros.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
typesizes.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
unistd_ext.h io: Refactor close_range and closefrom 2021-11-24 09:09:37 -03:00