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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>
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <sys/types.h>
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/* Nonzero if the system calls are not available. */
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extern int __no_posix_timers attribute_hidden;
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/* Callback to start helper thread. */
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extern void __timer_start_helper_thread (void) attribute_hidden;
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/* Control variable for helper thread creation. */
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extern pthread_once_t __timer_helper_once attribute_hidden;
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/* Called from fork so that the new subprocess re-creates the
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notification thread if necessary. */
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void __timer_fork_subprocess (void) attribute_hidden;
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/* TID of the helper thread. */
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extern pid_t __timer_helper_tid attribute_hidden;
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/* List of active SIGEV_THREAD timers. */
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extern struct timer *__timer_active_sigev_thread attribute_hidden;
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/* Lock for __timer_active_sigev_thread. */
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extern pthread_mutex_t __timer_active_sigev_thread_lock attribute_hidden;
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extern __typeof (timer_create) __timer_create;
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libc_hidden_proto (__timer_create)
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extern __typeof (timer_delete) __timer_delete;
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libc_hidden_proto (__timer_delete)
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extern __typeof (timer_getoverrun) __timer_getoverrun;
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libc_hidden_proto (__timer_getoverrun)
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/* Type of timers in the kernel. */
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typedef int kernel_timer_t;
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/* Internal representation of SIGEV_THREAD timer. */
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struct timer
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{
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kernel_timer_t ktimerid;
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void (*thrfunc) (sigval_t);
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sigval_t sival;
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pthread_attr_t attr;
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/* Next element in list of active SIGEV_THREAD timers. */
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struct timer *next;
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};
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/* For !SIGEV_THREAD, the resulting 'timer_t' is the returned kernel timer
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identifer (kernel_timer_t), while for SIGEV_THREAD it uses the fact malloc
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returns at least _Alignof (max_align_t) pointers plus that valid
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kernel_timer_t are always positive to set the MSB bit of the returned
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'timer_t' to indicate the timer handles a SIGEV_THREAD. */
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static inline timer_t
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kernel_timer_to_timerid (kernel_timer_t ktimerid)
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{
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return (timer_t) ((intptr_t) ktimerid);
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}
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static inline timer_t
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timer_to_timerid (struct timer *ptr)
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{
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return (timer_t) (INTPTR_MIN | (uintptr_t) ptr >> 1);
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}
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static inline bool
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timer_is_sigev_thread (timer_t timerid)
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{
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return (intptr_t) timerid < 0;
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}
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static inline struct timer *
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timerid_to_timer (timer_t timerid)
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{
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return (struct timer *)((uintptr_t) timerid << 1);
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}
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static inline kernel_timer_t
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timerid_to_kernel_timer (timer_t timerid)
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{
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if (timer_is_sigev_thread (timerid))
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return timerid_to_timer (timerid)->ktimerid;
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else
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return (kernel_timer_t) ((uintptr_t) timerid);
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}
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/* New targets use int instead of timer_t. The difference only
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matters on 64-bit targets. */
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#include <timer_t_was_int_compat.h>
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#if TIMER_T_WAS_INT_COMPAT
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# define OLD_TIMER_MAX 256
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extern timer_t __timer_compat_list[OLD_TIMER_MAX];
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#endif
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