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/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <sysdep.h>
#include <lowlevellock.h>
#include <sys/time.h>
void
___lll_lock (futex, newval)
int *futex;
int newval;
{
do
{
int oldval;
lll_futex_wait (futex, newval);
lll_compare_and_swap (futex, oldval, newval, "lr %2,%1; ahi %2,-1");
}
while (newval != 0);
*futex = -1;
}
hidden_proto (___lll_lock)
int
lll_unlock_wake_cb (futex)
int *futex;
{
int oldval;
int newval;
lll_compare_and_swap (futex, oldval, newval, "lr %2,%1; ahi %2,1");
if (oldval < 0)
lll_futex_wake (futex, 1);
return 0;
}
hidden_proto (lll_unlock_wake_cb)
int
___lll_timedwait_tid (ptid, abstime)
int *ptid;
const struct timespec *abstime;
{
int tid;
if (abstime == NULL || abstime->tv_nsec >= 1000000000)
return EINVAL;
/* Repeat until thread terminated. */
while ((tid = *ptid) != 0)
{
/* Get current time. */
struct timeval tv;
gettimeofday (&tv, NULL);
/* Determine relative timeout. */
struct timespec rt;
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (rt.tv_nsec < 0)
{
rt.tv_nsec += 1000000000;
rt.tv_sec--;
}
/* Already timed out? */
if (rt.tv_sec < 0)
return ETIMEDOUT;
/* Wait until thread terminates. */
int err = lll_futex_timed_wait (ptid, tid, &rt);
/* Woken due to timeout? */
if (err == -ETIMEDOUT)
/* Yes. */
return ETIMEDOUT;
}
return 0;
}
hidden_proto (___lll_timedwait_tid)
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