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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/* Setup of nscd worker threads. Linux verison.
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Copyright (C) 2004-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <unistd.h>
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#include <nscd.h>
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#include <sysdep.h>
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int
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setup_thread (struct database_dyn *db)
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{
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/* Only supported when NPTL is used. */
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char buf[100];
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if (confstr (_CS_GNU_LIBPTHREAD_VERSION, buf, sizeof (buf)) >= sizeof (buf)
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|| strncmp (buf, "NPTL", 4) != 0)
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return 0;
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/* Do not try this at home, kids. We play with the SETTID address
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even thought the process is multi-threaded. This can only work
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since none of the threads ever terminates. */
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int r = INTERNAL_SYSCALL_CALL (set_tid_address,
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&db->head->nscd_certainly_running);
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if (!INTERNAL_SYSCALL_ERROR_P (r))
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/* We know the kernel can reset this field when nscd terminates.
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So, set the field to a nonzero value which indicates that nscd
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is certainly running and clients can skip the test. */
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return db->head->nscd_certainly_running = 1;
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return 0;
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}
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