[PATCH 23/23] linux: Add time64 support for nanosleep
Adhemerval Zanella
adhemerval.zanella@linaro.org
Mon Jul 13 17:10:25 GMT 2020
It uses __clock_nanosleep64 and adds the __nanosleep64 symbol.
Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15
kernel).
---
include/time.h | 19 ++++++---
sysdeps/unix/sysv/linux/clock_nanosleep.c | 8 ++--
sysdeps/unix/sysv/linux/nanosleep.c | 50 +++++++++++++++++++++++
3 files changed, 68 insertions(+), 9 deletions(-)
create mode 100644 sysdeps/unix/sysv/linux/nanosleep.c
diff --git a/include/time.h b/include/time.h
index 936486e206..ad0476be05 100644
--- a/include/time.h
+++ b/include/time.h
@@ -271,6 +271,15 @@ extern struct tm *__tz_convert (__time64_t timer, int use_localtime,
extern int __nanosleep (const struct timespec *__requested_time,
struct timespec *__remaining);
hidden_proto (__nanosleep)
+#if __TIMESIZE == 64
+# define __nanosleep64 __nanosleep
+#else
+extern int __nanosleep64 (const struct __timespec64 *__requested_time,
+ struct __timespec64 *__remaining);
+hidden_proto (__nanosleep64)
+#endif
+
+
extern int __getdate_r (const char *__string, struct tm *__resbufp)
attribute_hidden;
@@ -294,14 +303,14 @@ libc_hidden_proto (__difftime64)
extern double __difftime (time_t time1, time_t time0);
#if __TIMESIZE == 64
-# define __clock_nanosleep_time64 __clock_nanosleep
+# define __clock_nanosleep64 __clock_nanosleep
# define __clock_gettime64 __clock_gettime
# define __timespec_get64 __timespec_get
#else
-extern int __clock_nanosleep_time64 (clockid_t clock_id,
- int flags, const struct __timespec64 *req,
- struct __timespec64 *rem);
-libc_hidden_proto (__clock_nanosleep_time64)
+extern int __clock_nanosleep64 (clockid_t clock_id,
+ int flags, const struct __timespec64 *req,
+ struct __timespec64 *rem);
+libc_hidden_proto (__clock_nanosleep64)
extern int __clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp);
libc_hidden_proto (__clock_gettime64)
extern int __timespec_get64 (struct __timespec64 *ts, int base);
diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c
index 6ad3321435..697e403ac8 100644
--- a/sysdeps/unix/sysv/linux/clock_nanosleep.c
+++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c
@@ -27,8 +27,8 @@
/* We can simply use the syscall. The CPU clocks are not supported
with this function. */
int
-__clock_nanosleep_time64 (clockid_t clock_id, int flags, const struct __timespec64 *req,
- struct __timespec64 *rem)
+__clock_nanosleep64 (clockid_t clock_id, int flags,
+ const struct __timespec64 *req, struct __timespec64 *rem)
{
if (clock_id == CLOCK_THREAD_CPUTIME_ID)
return EINVAL;
@@ -68,7 +68,7 @@ __clock_nanosleep_time64 (clockid_t clock_id, int flags, const struct __timespec
}
#if __TIMESIZE != 64
-libc_hidden_def (__clock_nanosleep_time64)
+libc_hidden_def (__clock_nanosleep64)
int
__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
@@ -78,7 +78,7 @@ __clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
struct __timespec64 treq64, trem64;
treq64 = valid_timespec_to_timespec64 (*req);
- r = __clock_nanosleep_time64 (clock_id, flags, &treq64, &trem64);
+ r = __clock_nanosleep64 (clock_id, flags, &treq64, &trem64);
if (r == EINTR && rem != NULL && (flags & TIMER_ABSTIME) == 0)
*rem = valid_timespec64_to_timespec (trem64);
diff --git a/sysdeps/unix/sysv/linux/nanosleep.c b/sysdeps/unix/sysv/linux/nanosleep.c
new file mode 100644
index 0000000000..7e13a98b4c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nanosleep.c
@@ -0,0 +1,50 @@
+/* High-resolution sleep.
+ Copyright (C) 2020 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <time.h>
+#include <errno.h>
+
+int
+__nanosleep64 (const struct __timespec64 *req, struct __timespec64 *rem)
+{
+ int ret = __clock_nanosleep64 (CLOCK_REALTIME, 0, req, rem);
+ if (ret != 0)
+ {
+ __set_errno (ret);
+ return -1;
+ }
+ return 0;
+}
+#if __TIMESIZE != 64
+libc_hidden_def (__nanosleep64)
+
+int
+__nanosleep (const struct timespec *req, struct timespec *rem)
+{
+ struct __timespec64 treq64, trem64;
+
+ treq64 = valid_timespec_to_timespec64 (*req);
+ int ret = __nanosleep64 (&treq64, &trem64);
+
+ if (ret != 0 && errno == EINTR && rem != NULL)
+ *rem = valid_timespec64_to_timespec (trem64);
+ return ret;
+}
+#endif
+libc_hidden_def (__nanosleep)
+weak_alias (__nanosleep, nanosleep)
--
2.25.1
More information about the Libc-alpha
mailing list