y2038: linux: Provide __sched_rr_get_interval64 implementation
Commit Message
This patch replaces auto generated wrapper (as described in
sysdeps/unix/sysv/linux/syscalls.list) for sched_rr_get_interval with one which
adds extra support for reading 64 bit time values on machines with
__TIMESIZE != 64.
There is no functional change for architectures already supporting 64 bit
time ABI.
The sched_rr_get_interval declaration in ./include/sched.h is not followed by
corresponding libc_hidden_proto(), so it has been assumed that newly introduced
syscall wrapper doesn't require libc_hidden_def() (which has been added by
template used with auto generation script).
Moreover, the code for building sched_rr_gi.c file is already placed in
./posix/Makefiles, so there was no need to add it elsewhere.
Performed tests and validation are the same as for timer_gettime() conversion
(sysdeps/unix/sysv/linux/timer_gettime.c).
---
include/time.h | 7 +++
sysdeps/unix/sysv/linux/sched_rr_gi.c | 73 +++++++++++++++++++++++++++
sysdeps/unix/sysv/linux/syscalls.list | 1 -
3 files changed, 80 insertions(+), 1 deletion(-)
create mode 100644 sysdeps/unix/sysv/linux/sched_rr_gi.c
Comments
Dear All,
> This patch replaces auto generated wrapper (as described in
> sysdeps/unix/sysv/linux/syscalls.list) for sched_rr_get_interval with
> one which adds extra support for reading 64 bit time values on
> machines with __TIMESIZE != 64.
> There is no functional change for architectures already supporting 64
> bit time ABI.
>
> The sched_rr_get_interval declaration in ./include/sched.h is not
> followed by corresponding libc_hidden_proto(), so it has been assumed
> that newly introduced syscall wrapper doesn't require
> libc_hidden_def() (which has been added by template used with auto
> generation script).
>
> Moreover, the code for building sched_rr_gi.c file is already placed
> in ./posix/Makefiles, so there was no need to add it elsewhere.
>
> Performed tests and validation are the same as for timer_gettime()
> conversion (sysdeps/unix/sysv/linux/timer_gettime.c).
> ---
> include/time.h | 7 +++
> sysdeps/unix/sysv/linux/sched_rr_gi.c | 73
> +++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/syscalls.list |
> 1 - 3 files changed, 80 insertions(+), 1 deletion(-)
> create mode 100644 sysdeps/unix/sysv/linux/sched_rr_gi.c
>
> diff --git a/include/time.h b/include/time.h
> index f23bfea737..558923274a 100644
> --- a/include/time.h
> +++ b/include/time.h
> @@ -203,6 +203,13 @@ libc_hidden_proto (__timer_settime64);
> libc_hidden_proto (__timerfd_settime64);
> #endif
>
> +#if __TIMESIZE == 64
> +# define __sched_rr_get_interval64 __sched_rr_get_interval
> +#else
> +extern int __sched_rr_get_interval64 (pid_t pid, struct __timespec64
> *tp); +libc_hidden_proto (__sched_rr_get_interval64);
> +#endif
> +
> /* Compute the `struct tm' representation of T,
> offset OFFSET seconds east of UTC,
> and store year, yday, mon, mday, wday, hour, min, sec into *TP.
> diff --git a/sysdeps/unix/sysv/linux/sched_rr_gi.c
> b/sysdeps/unix/sysv/linux/sched_rr_gi.c new file mode 100644
> index 0000000000..3d7b484591
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/sched_rr_gi.c
> @@ -0,0 +1,73 @@
> +/* sched_rr_get_interval -- get the scheduler's SCHED_RR policy time
> interval.
> + 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; see the file COPYING.LIB.
> If
> + not, see <https://www.gnu.org/licenses/>. */
> +
> +#include <errno.h>
> +#include <stdlib.h>
> +#include <time.h>
> +#include <sysdep.h>
> +#include <kernel-features.h>
> +
> +int
> +__sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp)
> +{
> +#ifdef __ASSUME_TIME64_SYSCALLS
> +# ifndef __NR_sched_rr_get_interval_time64
> +# define __NR_sched_rr_get_interval_time64
> __NR_sched_rr_get_interval +# endif
> + return INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid, tp);
> +#else
> +# ifdef __NR_sched_rr_get_interval_time64
> + int ret = INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid,
> tp);
> + if (ret == 0 || errno != ENOSYS)
> + return ret;
> +# endif
> + struct timespec tp32;
> + int retval = INLINE_SYSCALL_CALL (sched_rr_get_interval, pid,
> &tp32);
> + if (retval == 0)
> + *tp = valid_timespec_to_timespec64 (tp32);
> +
> + return retval;
> +#endif
> +}
> +
> +#if __TIMESIZE != 64
> +libc_hidden_def (__sched_rr_get_interval64)
> +
> +int
> +__sched_rr_get_interval (pid_t pid, struct timespec *tp)
> +{
> + int ret;
> + struct __timespec64 tp64;
> +
> + ret = __sched_rr_get_interval64 (pid, &tp64);
> +
> + if (ret == 0)
> + {
> + if (! in_time_t_range (tp64.tv_sec))
> + {
> + __set_errno (EOVERFLOW);
> + return -1;
> + }
> +
> + *tp = valid_timespec64_to_timespec (tp64);
> + }
> +
> + return ret;
> +}
> +#endif
> +strong_alias (__sched_rr_get_interval, sched_rr_get_interval)
> diff --git a/sysdeps/unix/sysv/linux/syscalls.list
> b/sysdeps/unix/sysv/linux/syscalls.list index 1fa546f231..5d65ed23e0
> 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list
> +++ b/sysdeps/unix/sysv/linux/syscalls.list
> @@ -51,7 +51,6 @@ sched_getp - sched_getparam
> i:ip __sched_getparam sched_getparam sched_gets
> - sched_getscheduler i:i
> __sched_getscheduler sched_getscheduler sched_primax
> - sched_get_priority_max i:i
> __sched_get_priority_max sched_get_priority_max
> sched_primin - sched_get_priority_min i:i
> __sched_get_priority_min sched_get_priority_min
> -sched_rr_gi - sched_rr_get_interval i:ip
> __sched_rr_get_interval sched_rr_get_interval
> sched_setp - sched_setparam i:ip
> __sched_setparam sched_setparam sched_sets -
> sched_setscheduler i:iip __sched_setscheduler
> sched_setscheduler sched_yield - sched_yield
> i: __sched_yield sched_yield
Gentle ping for review.
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
Dear All,
> Dear All,
>
> > This patch replaces auto generated wrapper (as described in
> > sysdeps/unix/sysv/linux/syscalls.list) for sched_rr_get_interval
> > with one which adds extra support for reading 64 bit time values on
> > machines with __TIMESIZE != 64.
> > There is no functional change for architectures already supporting
> > 64 bit time ABI.
> >
> > The sched_rr_get_interval declaration in ./include/sched.h is not
> > followed by corresponding libc_hidden_proto(), so it has been
> > assumed that newly introduced syscall wrapper doesn't require
> > libc_hidden_def() (which has been added by template used with auto
> > generation script).
> >
> > Moreover, the code for building sched_rr_gi.c file is already placed
> > in ./posix/Makefiles, so there was no need to add it elsewhere.
> >
> > Performed tests and validation are the same as for timer_gettime()
> > conversion (sysdeps/unix/sysv/linux/timer_gettime.c).
> > ---
> > include/time.h | 7 +++
> > sysdeps/unix/sysv/linux/sched_rr_gi.c | 73
> > +++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/syscalls.list |
> > 1 - 3 files changed, 80 insertions(+), 1 deletion(-)
> > create mode 100644 sysdeps/unix/sysv/linux/sched_rr_gi.c
> >
> > diff --git a/include/time.h b/include/time.h
> > index f23bfea737..558923274a 100644
> > --- a/include/time.h
> > +++ b/include/time.h
> > @@ -203,6 +203,13 @@ libc_hidden_proto (__timer_settime64);
> > libc_hidden_proto (__timerfd_settime64);
> > #endif
> >
> > +#if __TIMESIZE == 64
> > +# define __sched_rr_get_interval64 __sched_rr_get_interval
> > +#else
> > +extern int __sched_rr_get_interval64 (pid_t pid, struct
> > __timespec64 *tp); +libc_hidden_proto (__sched_rr_get_interval64);
> > +#endif
> > +
> > /* Compute the `struct tm' representation of T,
> > offset OFFSET seconds east of UTC,
> > and store year, yday, mon, mday, wday, hour, min, sec into *TP.
> > diff --git a/sysdeps/unix/sysv/linux/sched_rr_gi.c
> > b/sysdeps/unix/sysv/linux/sched_rr_gi.c new file mode 100644
> > index 0000000000..3d7b484591
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/sched_rr_gi.c
> > @@ -0,0 +1,73 @@
> > +/* sched_rr_get_interval -- get the scheduler's SCHED_RR policy
> > time interval.
> > + 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; see the file COPYING.LIB.
> > If
> > + not, see <https://www.gnu.org/licenses/>. */
> > +
> > +#include <errno.h>
> > +#include <stdlib.h>
> > +#include <time.h>
> > +#include <sysdep.h>
> > +#include <kernel-features.h>
> > +
> > +int
> > +__sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp)
> > +{
> > +#ifdef __ASSUME_TIME64_SYSCALLS
> > +# ifndef __NR_sched_rr_get_interval_time64
> > +# define __NR_sched_rr_get_interval_time64
> > __NR_sched_rr_get_interval +# endif
> > + return INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid,
> > tp); +#else
> > +# ifdef __NR_sched_rr_get_interval_time64
> > + int ret = INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid,
> > tp);
> > + if (ret == 0 || errno != ENOSYS)
> > + return ret;
> > +# endif
> > + struct timespec tp32;
> > + int retval = INLINE_SYSCALL_CALL (sched_rr_get_interval, pid,
> > &tp32);
> > + if (retval == 0)
> > + *tp = valid_timespec_to_timespec64 (tp32);
> > +
> > + return retval;
> > +#endif
> > +}
> > +
> > +#if __TIMESIZE != 64
> > +libc_hidden_def (__sched_rr_get_interval64)
> > +
> > +int
> > +__sched_rr_get_interval (pid_t pid, struct timespec *tp)
> > +{
> > + int ret;
> > + struct __timespec64 tp64;
> > +
> > + ret = __sched_rr_get_interval64 (pid, &tp64);
> > +
> > + if (ret == 0)
> > + {
> > + if (! in_time_t_range (tp64.tv_sec))
> > + {
> > + __set_errno (EOVERFLOW);
> > + return -1;
> > + }
> > +
> > + *tp = valid_timespec64_to_timespec (tp64);
> > + }
> > +
> > + return ret;
> > +}
> > +#endif
> > +strong_alias (__sched_rr_get_interval, sched_rr_get_interval)
> > diff --git a/sysdeps/unix/sysv/linux/syscalls.list
> > b/sysdeps/unix/sysv/linux/syscalls.list index 1fa546f231..5d65ed23e0
> > 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list
> > +++ b/sysdeps/unix/sysv/linux/syscalls.list
> > @@ -51,7 +51,6 @@ sched_getp - sched_getparam
> > i:ip __sched_getparam sched_getparam sched_gets
> > - sched_getscheduler i:i
> > __sched_getscheduler sched_getscheduler sched_primax
> > - sched_get_priority_max i:i
> > __sched_get_priority_max sched_get_priority_max
> > sched_primin - sched_get_priority_min i:i
> > __sched_get_priority_min sched_get_priority_min
> > -sched_rr_gi - sched_rr_get_interval i:ip
> > __sched_rr_get_interval sched_rr_get_interval
> > sched_setp - sched_setparam i:ip
> > __sched_setparam sched_setparam sched_sets -
> > sched_setscheduler i:iip __sched_setscheduler
> > sched_setscheduler sched_yield - sched_yield
> > i: __sched_yield sched_yield
>
> Gentle ping for review.
Gentle ping for review of this patch.
>
>
> Best regards,
>
> Lukasz Majewski
>
> --
>
> DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email:
> lukma@denx.de
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
On 08/01/2020 13:22, Lukasz Majewski wrote:
> This patch replaces auto generated wrapper (as described in
> sysdeps/unix/sysv/linux/syscalls.list) for sched_rr_get_interval with one which
> adds extra support for reading 64 bit time values on machines with
> __TIMESIZE != 64.
> There is no functional change for architectures already supporting 64 bit
> time ABI.
>
> The sched_rr_get_interval declaration in ./include/sched.h is not followed by
> corresponding libc_hidden_proto(), so it has been assumed that newly introduced
> syscall wrapper doesn't require libc_hidden_def() (which has been added by
> template used with auto generation script).
>
> Moreover, the code for building sched_rr_gi.c file is already placed in
> ./posix/Makefiles, so there was no need to add it elsewhere.
>
> Performed tests and validation are the same as for timer_gettime() conversion
> (sysdeps/unix/sysv/linux/timer_gettime.c).
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> include/time.h | 7 +++
> sysdeps/unix/sysv/linux/sched_rr_gi.c | 73 +++++++++++++++++++++++++++
> sysdeps/unix/sysv/linux/syscalls.list | 1 -
> 3 files changed, 80 insertions(+), 1 deletion(-)
> create mode 100644 sysdeps/unix/sysv/linux/sched_rr_gi.c
>
> diff --git a/include/time.h b/include/time.h
> index f23bfea737..558923274a 100644
> --- a/include/time.h
> +++ b/include/time.h
> @@ -203,6 +203,13 @@ libc_hidden_proto (__timer_settime64);
> libc_hidden_proto (__timerfd_settime64);
> #endif
>
> +#if __TIMESIZE == 64
> +# define __sched_rr_get_interval64 __sched_rr_get_interval
> +#else
> +extern int __sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp);
> +libc_hidden_proto (__sched_rr_get_interval64);
> +#endif
> +
> /* Compute the `struct tm' representation of T,
> offset OFFSET seconds east of UTC,
> and store year, yday, mon, mday, wday, hour, min, sec into *TP.
Ok.
> diff --git a/sysdeps/unix/sysv/linux/sched_rr_gi.c b/sysdeps/unix/sysv/linux/sched_rr_gi.c
> new file mode 100644
> index 0000000000..3d7b484591
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/sched_rr_gi.c
> @@ -0,0 +1,73 @@
> +/* sched_rr_get_interval -- get the scheduler's SCHED_RR policy time interval.
> + 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; see the file COPYING.LIB. If
> + not, see <https://www.gnu.org/licenses/>. */
> +
> +#include <errno.h>
> +#include <stdlib.h>
> +#include <time.h>
> +#include <sysdep.h>
> +#include <kernel-features.h>
> +
> +int
> +__sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp)
> +{
> +#ifdef __ASSUME_TIME64_SYSCALLS
> +# ifndef __NR_sched_rr_get_interval_time64
> +# define __NR_sched_rr_get_interval_time64 __NR_sched_rr_get_interval
> +# endif
> + return INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid, tp);
Ok.
> +#else
> +# ifdef __NR_sched_rr_get_interval_time64
> + int ret = INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid, tp);
> + if (ret == 0 || errno != ENOSYS)
> + return ret;
> +# endif
> + struct timespec tp32;
> + int retval = INLINE_SYSCALL_CALL (sched_rr_get_interval, pid, &tp32);
> + if (retval == 0)
> + *tp = valid_timespec_to_timespec64 (tp32);
> +
> + return retval;
> +#endif
> +}
Ok.
> +
> +#if __TIMESIZE != 64
> +libc_hidden_def (__sched_rr_get_interval64)
> +
> +int
> +__sched_rr_get_interval (pid_t pid, struct timespec *tp)
> +{
> + int ret;
> + struct __timespec64 tp64;
> +
> + ret = __sched_rr_get_interval64 (pid, &tp64);
> +
> + if (ret == 0)
> + {
> + if (! in_time_t_range (tp64.tv_sec))
> + {
> + __set_errno (EOVERFLOW);
> + return -1;
> + }
> +
> + *tp = valid_timespec64_to_timespec (tp64);
> + }
> +
> + return ret;
> +}
> +#endif
> +strong_alias (__sched_rr_get_interval, sched_rr_get_interval)
Ok.
> diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
> index 1fa546f231..5d65ed23e0 100644
> --- a/sysdeps/unix/sysv/linux/syscalls.list
> +++ b/sysdeps/unix/sysv/linux/syscalls.list
> @@ -51,7 +51,6 @@ sched_getp - sched_getparam i:ip __sched_getparam sched_getparam
> sched_gets - sched_getscheduler i:i __sched_getscheduler sched_getscheduler
> sched_primax - sched_get_priority_max i:i __sched_get_priority_max sched_get_priority_max
> sched_primin - sched_get_priority_min i:i __sched_get_priority_min sched_get_priority_min
> -sched_rr_gi - sched_rr_get_interval i:ip __sched_rr_get_interval sched_rr_get_interval
> sched_setp - sched_setparam i:ip __sched_setparam sched_setparam
> sched_sets - sched_setscheduler i:iip __sched_setscheduler sched_setscheduler
> sched_yield - sched_yield i: __sched_yield sched_yield
>
Ok.
@@ -203,6 +203,13 @@ libc_hidden_proto (__timer_settime64);
libc_hidden_proto (__timerfd_settime64);
#endif
+#if __TIMESIZE == 64
+# define __sched_rr_get_interval64 __sched_rr_get_interval
+#else
+extern int __sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp);
+libc_hidden_proto (__sched_rr_get_interval64);
+#endif
+
/* Compute the `struct tm' representation of T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
new file mode 100644
@@ -0,0 +1,73 @@
+/* sched_rr_get_interval -- get the scheduler's SCHED_RR policy time interval.
+ 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; see the file COPYING.LIB. If
+ not, see <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+
+int
+__sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp)
+{
+#ifdef __ASSUME_TIME64_SYSCALLS
+# ifndef __NR_sched_rr_get_interval_time64
+# define __NR_sched_rr_get_interval_time64 __NR_sched_rr_get_interval
+# endif
+ return INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid, tp);
+#else
+# ifdef __NR_sched_rr_get_interval_time64
+ int ret = INLINE_SYSCALL_CALL (sched_rr_get_interval_time64, pid, tp);
+ if (ret == 0 || errno != ENOSYS)
+ return ret;
+# endif
+ struct timespec tp32;
+ int retval = INLINE_SYSCALL_CALL (sched_rr_get_interval, pid, &tp32);
+ if (retval == 0)
+ *tp = valid_timespec_to_timespec64 (tp32);
+
+ return retval;
+#endif
+}
+
+#if __TIMESIZE != 64
+libc_hidden_def (__sched_rr_get_interval64)
+
+int
+__sched_rr_get_interval (pid_t pid, struct timespec *tp)
+{
+ int ret;
+ struct __timespec64 tp64;
+
+ ret = __sched_rr_get_interval64 (pid, &tp64);
+
+ if (ret == 0)
+ {
+ if (! in_time_t_range (tp64.tv_sec))
+ {
+ __set_errno (EOVERFLOW);
+ return -1;
+ }
+
+ *tp = valid_timespec64_to_timespec (tp64);
+ }
+
+ return ret;
+}
+#endif
+strong_alias (__sched_rr_get_interval, sched_rr_get_interval)
@@ -51,7 +51,6 @@ sched_getp - sched_getparam i:ip __sched_getparam sched_getparam
sched_gets - sched_getscheduler i:i __sched_getscheduler sched_getscheduler
sched_primax - sched_get_priority_max i:i __sched_get_priority_max sched_get_priority_max
sched_primin - sched_get_priority_min i:i __sched_get_priority_min sched_get_priority_min
-sched_rr_gi - sched_rr_get_interval i:ip __sched_rr_get_interval sched_rr_get_interval
sched_setp - sched_setparam i:ip __sched_setparam sched_setparam
sched_sets - sched_setscheduler i:iip __sched_setscheduler sched_setscheduler
sched_yield - sched_yield i: __sched_yield sched_yield