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posix: Consolidate register-atfork

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Both htl and nptl uses a different data structure to implement atfork
handlers.  The nptl one was refactored by 27761a1042 to use a dynarray
which simplifies the code.

This patch moves the nptl one to be the generic implementation and
replace Hurd linked one.  Different than previous NPTL, Hurd also uses
a global lock, so performance should be similar.

Checked on x86_64-linux-gnu, i686-linux-gnu, and with a build for
i686-gnu.
This commit is contained in:
Adhemerval Zanella
2021-01-18 15:10:02 -03:00
parent cdba937662
commit 2b47727c68
10 changed files with 66 additions and 219 deletions
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19
sysdeps/generic/fork.h
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@ -6,3 +6,22 @@
parameter which is the DSO handle for the DSO which gets unloaded.
The function so called has to remove the atfork handlers registered
by this module. */
/* System specific fork definition. Generic version.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */