diff options
Diffstat (limited to 'sysdeps/mach/hurd/getitimer.c')
-rw-r--r-- | sysdeps/mach/hurd/getitimer.c | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/sysdeps/mach/hurd/getitimer.c b/sysdeps/mach/hurd/getitimer.c deleted file mode 100644 index 23ff376743..0000000000 --- a/sysdeps/mach/hurd/getitimer.c +++ /dev/null @@ -1,101 +0,0 @@ -/* Copyright (C) 1994-2017 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 - <http://www.gnu.org/licenses/>. */ - -#include <stddef.h> -#include <errno.h> -#include <sys/time.h> -#include <hurd.h> - -/* XXX Temporary cheezoid implementation; see __setitmr.c. */ - -/* These are defined in __setitmr.c. */ -extern spin_lock_t _hurd_itimer_lock; -extern struct itimerval _hurd_itimerval; -extern struct timeval _hurd_itimer_started; - -static inline void -subtract_timeval (struct timeval *from, const struct timeval *subtract) -{ - from->tv_usec -= subtract->tv_usec; - from->tv_sec -= subtract->tv_sec; - while (from->tv_usec < 0) - { - --from->tv_sec; - from->tv_usec += 1000000; - } -} - -/* Set *VALUE to the current setting of timer WHICH. - Return 0 on success, -1 on errors. */ -int -__getitimer (enum __itimer_which which, struct itimerval *value) -{ - struct itimerval val; - struct timeval elapsed; - - switch (which) - { - default: - return __hurd_fail (EINVAL); - - case ITIMER_VIRTUAL: - case ITIMER_PROF: - return __hurd_fail (ENOSYS); - - case ITIMER_REAL: - break; - } - - /* Get the time now. */ - if (__gettimeofday (&elapsed, NULL) < 0) - return -1; - - /* Extract the current timer setting; and the time it was set, so we can - calculate the time elapsed so far. */ - HURD_CRITICAL_BEGIN; - __spin_lock (&_hurd_itimer_lock); - val = _hurd_itimerval; - subtract_timeval (&elapsed, &_hurd_itimer_started); - __spin_unlock (&_hurd_itimer_lock); - HURD_CRITICAL_END; - - if ((val.it_value.tv_sec | val.it_value.tv_usec) != 0) - { - /* There is a pending alarm set. VAL indicates the interval it was - set for, relative to the time recorded in _hurd_itimer_started. - Now compensate for the time elapsed since to get the user's - conception of the current value of the timer (as if the value - stored decreased every microsecond). */ - if (timercmp (&val.it_value, &elapsed, <)) - { - /* Hmm. The timer should have just gone off, but has not been - reset. This is a possible timing glitch. The alarm will signal - soon, so fabricate a value for how soon. */ - val.it_value.tv_sec = 0; - val.it_value.tv_usec = 10; /* Random. */ - } - else - /* Subtract the time elapsed since the timer was set - from the current timer value the user sees. */ - subtract_timeval (&val.it_value, &elapsed); - } - - *value = val; - return 0; -} - -weak_alias (__getitimer, getitimer) |