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authorRoland McGrath <roland@hack.frob.com>2015-05-26 14:49:13 -0700
committerRoland McGrath <roland@hack.frob.com>2015-05-26 14:49:13 -0700
commit68c97aef626e489effeffe6d1d6a4f14656a720c (patch)
tree2f51029eda95535f68d6d2ce92481db26a5ddd07 /nptl
parent97554e4382e5d85eccf146b58f85aaad7e3d687c (diff)
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Split timed-wait functions out of nptl/lowlevellock.c.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/Makefile1
-rw-r--r--nptl/lll_timedlock_wait.c59
-rw-r--r--nptl/lll_timedwait_tid.c70
-rw-r--r--nptl/lowlevellock.c85
4 files changed, 131 insertions, 84 deletions
diff --git a/nptl/Makefile b/nptl/Makefile
index 8e99452..3dd2944 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -106,6 +106,7 @@ libpthread-routines = nptl-init vars events version \
pt-longjmp pt-cleanup\
cancellation \
lowlevellock lowlevelrobustlock \
+ lll_timedlock_wait lll_timedwait_tid \
pt-fork pt-vfork \
ptw-write ptw-read ptw-close ptw-fcntl ptw-accept \
ptw-connect ptw-recv ptw-recvfrom ptw-recvmsg ptw-send \
diff --git a/nptl/lll_timedlock_wait.c b/nptl/lll_timedlock_wait.c
new file mode 100644
index 0000000..37cf083
--- /dev/null
+++ b/nptl/lll_timedlock_wait.c
@@ -0,0 +1,59 @@
+/* Timed low level locking for pthread library. Generic futex-using version.
+ Copyright (C) 2003-2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Paul Mackerras <paulus@au.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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <atomic.h>
+#include <errno.h>
+#include <lowlevellock.h>
+#include <sys/time.h>
+
+
+int
+__lll_timedlock_wait (int *futex, const struct timespec *abstime, int private)
+{
+ /* Reject invalid timeouts. */
+ if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+ return EINVAL;
+
+ /* Try locking. */
+ while (atomic_exchange_acq (futex, 2) != 0)
+ {
+ struct timeval tv;
+
+ /* Get the current time. */
+ (void) __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;
+ }
+
+ if (rt.tv_sec < 0)
+ return ETIMEDOUT;
+
+ /* If *futex == 2, wait until woken or timeout. */
+ lll_futex_timed_wait (futex, 2, &rt, private);
+ }
+
+ return 0;
+}
diff --git a/nptl/lll_timedwait_tid.c b/nptl/lll_timedwait_tid.c
new file mode 100644
index 0000000..68b4857
--- /dev/null
+++ b/nptl/lll_timedwait_tid.c
@@ -0,0 +1,70 @@
+/* Timed waiting for thread death. Generic futex-using version.
+ Copyright (C) 2003-2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Paul Mackerras <paulus@au.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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <atomic.h>
+#include <errno.h>
+#include <lowlevellock.h>
+#include <sys/time.h>
+
+
+/* The kernel notifies a process which uses CLONE_CHILD_CLEARTID via futex
+ wake-up when the clone terminates. The memory location contains the
+ thread ID while the clone is running and is reset to zero by the kernel
+ afterwards. The kernel up to version 3.16.3 does not use the private futex
+ operations for futex wake-up when the clone terminates. */
+int
+__lll_timedwait_tid (int *tidp, const struct timespec *abstime)
+{
+ int tid;
+
+ if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+ return EINVAL;
+
+ /* Repeat until thread terminated. */
+ while ((tid = *tidp) != 0)
+ {
+ struct timeval tv;
+ struct timespec rt;
+
+ /* Get the current time. */
+ (void) __gettimeofday (&tv, NULL);
+
+ /* Compute relative timeout. */
+ 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;
+
+ /* If *tidp == tid, wait until thread terminates or the wait times out.
+ The kernel up to version 3.16.3 does not use the private futex
+ operations for futex wake-up when the clone terminates.
+ */
+ if (lll_futex_timed_wait (tidp, tid, &rt, LLL_SHARED) == -ETIMEDOUT)
+ return ETIMEDOUT;
+ }
+
+ return 0;
+}
diff --git a/nptl/lowlevellock.c b/nptl/lowlevellock.c
index 98c859f..7025b9e 100644
--- a/nptl/lowlevellock.c
+++ b/nptl/lowlevellock.c
@@ -34,7 +34,7 @@ __lll_lock_wait_private (int *futex)
}
-/* These functions don't get included in libc.so */
+/* This function doesn't get included in libc. */
#if IS_IN (libpthread)
void
__lll_lock_wait (int *futex, int private)
@@ -45,87 +45,4 @@ __lll_lock_wait (int *futex, int private)
while (atomic_exchange_acq (futex, 2) != 0)
lll_futex_wait (futex, 2, private); /* Wait if *futex == 2. */
}
-
-
-int
-__lll_timedlock_wait (int *futex, const struct timespec *abstime, int private)
-{
- /* Reject invalid timeouts. */
- if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
- return EINVAL;
-
- /* Try locking. */
- while (atomic_exchange_acq (futex, 2) != 0)
- {
- struct timeval tv;
-
- /* Get the current time. */
- (void) __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;
- }
-
- if (rt.tv_sec < 0)
- return ETIMEDOUT;
-
- /* If *futex == 2, wait until woken or timeout. */
- lll_futex_timed_wait (futex, 2, &rt, private);
- }
-
- return 0;
-}
-
-
-/* The kernel notifies a process which uses CLONE_CHILD_CLEARTID via futex
- wake-up when the clone terminates. The memory location contains the
- thread ID while the clone is running and is reset to zero by the kernel
- afterwards. The kernel up to version 3.16.3 does not use the private futex
- operations for futex wake-up when the clone terminates. */
-int
-__lll_timedwait_tid (int *tidp, const struct timespec *abstime)
-{
- int tid;
-
- if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
- return EINVAL;
-
- /* Repeat until thread terminated. */
- while ((tid = *tidp) != 0)
- {
- struct timeval tv;
- struct timespec rt;
-
- /* Get the current time. */
- (void) __gettimeofday (&tv, NULL);
-
- /* Compute relative timeout. */
- 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;
-
- /* If *tidp == tid, wait until thread terminates or the wait times out.
- The kernel up to version 3.16.3 does not use the private futex
- operations for futex wake-up when the clone terminates.
- */
- if (lll_futex_timed_wait (tidp, tid, &rt, LLL_SHARED) == -ETIMEDOUT)
- return ETIMEDOUT;
- }
-
- return 0;
-}
#endif