aboutsummaryrefslogtreecommitdiff
path: root/nptl/sysdeps/unix/sysv/linux/ia64/lowlevelmutex.c
diff options
context:
space:
mode:
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/ia64/lowlevelmutex.c')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/ia64/lowlevelmutex.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/lowlevelmutex.c b/nptl/sysdeps/unix/sysv/linux/ia64/lowlevelmutex.c
new file mode 100644
index 0000000000..7ab67ca56c
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/ia64/lowlevelmutex.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jakub Jelinek <jakub@redhat.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_mutex_lock (futex, newval)
+ int *futex;
+ int newval;
+{
+ int oldval, val;
+
+ do
+ {
+ lll_futex_wait (futex, newval);
+ val = *futex;
+ do
+ oldval = val;
+ while ((val = lll_compare_and_swap (futex, oldval, oldval + 1))
+ != oldval);
+ newval = val + 1;
+ }
+ while (val != 0);
+
+ *futex = 2;
+}
+hidden_proto (___lll_mutex_lock)
+
+
+int
+___lll_mutex_timedlock (futex, abstime, newval)
+ int *futex;
+ const struct timespec *abstime;
+ int newval;
+{
+ /* Reject invalid timeouts. */
+ if (abstime->tv_nsec >= 1000000000)
+ return EINVAL;
+
+ int oldval, val;
+ do
+ {
+ /* Get the current time. */
+ struct timeval tv;
+ gettimeofday (&tv, NULL);
+
+ /* Compute 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. */
+ int err = lll_futex_timed_wait (futex, newval, &rt);
+
+ /* If timed out return with an appropriate error. */
+ if (err == -ETIMEDOUT)
+ return ETIMEDOUT;
+
+ val = *futex;
+ do
+ oldval = val;
+ while ((val = lll_compare_and_swap (futex, oldval, oldval + 1))
+ != oldval);
+ newval = val + 1;
+ }
+ while (val != 0);
+
+ *futex = 2;
+
+ return 0;
+}
+hidden_proto (___lll_mutex_timedlock)