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47f24c21ee
A new build flag, _TIME_BITS, enables the usage of the newer 64-bit
time symbols for legacy ABI (where 32-bit time_t is default). The 64
bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is
also used.
Different than LFS support, the y2038 symbols are added only for the
required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32,
mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh). The ABIs with
64-bit time support are unchanged, both for symbol and types
redirection.
On Linux the full 64-bit time support requires a minimum of kernel
version v5.1. Otherwise, the 32-bit fallbacks are used and might
results in error with overflow return code (EOVERFLOW).
The i686-gnu does not yet support 64-bit time.
This patch exports following rediretions to support 64-bit time:
* libc:
adjtime
adjtimex
clock_adjtime
clock_getres
clock_gettime
clock_nanosleep
clock_settime
cnd_timedwait
ctime
ctime_r
difftime
fstat
fstatat
futimens
futimes
futimesat
getitimer
getrusage
gettimeofday
gmtime
gmtime_r
localtime
localtime_r
lstat_time
lutimes
mktime
msgctl
mtx_timedlock
nanosleep
nanosleep
ntp_gettime
ntp_gettimex
ppoll
pselec
pselect
pthread_clockjoin_np
pthread_cond_clockwait
pthread_cond_timedwait
pthread_mutex_clocklock
pthread_mutex_timedlock
pthread_rwlock_clockrdlock
pthread_rwlock_clockwrlock
pthread_rwlock_timedrdlock
pthread_rwlock_timedwrlock
pthread_timedjoin_np
recvmmsg
sched_rr_get_interval
select
sem_clockwait
semctl
semtimedop
sem_timedwait
setitimer
settimeofday
shmctl
sigtimedwait
stat
thrd_sleep
time
timegm
timerfd_gettime
timerfd_settime
timespec_get
utime
utimensat
utimes
utimes
wait3
wait4
* librt:
aio_suspend
mq_timedreceive
mq_timedsend
timer_gettime
timer_settime
* libanl:
gai_suspend
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
141 lines
4.9 KiB
C
141 lines
4.9 KiB
C
/* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface.
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Copyright (C) 1996-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SCHED_H
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#define _SCHED_H 1
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#include <features.h>
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/* Get type definitions. */
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#include <bits/types.h>
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#define __need_size_t
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#define __need_NULL
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#include <stddef.h>
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#include <bits/types/time_t.h>
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#include <bits/types/struct_timespec.h>
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#ifndef __USE_XOPEN2K
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# include <time.h>
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#endif
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#ifndef __pid_t_defined
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typedef __pid_t pid_t;
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# define __pid_t_defined
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#endif
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/* Get system specific constant and data structure definitions. */
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#include <bits/sched.h>
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#include <bits/cpu-set.h>
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/* Backward compatibility. */
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#define sched_priority sched_priority
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#define __sched_priority sched_priority
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__BEGIN_DECLS
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/* Set scheduling parameters for a process. */
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extern int sched_setparam (__pid_t __pid, const struct sched_param *__param)
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__THROW;
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/* Retrieve scheduling parameters for a particular process. */
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extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW;
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/* Set scheduling algorithm and/or parameters for a process. */
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extern int sched_setscheduler (__pid_t __pid, int __policy,
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const struct sched_param *__param) __THROW;
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/* Retrieve scheduling algorithm for a particular purpose. */
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extern int sched_getscheduler (__pid_t __pid) __THROW;
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/* Yield the processor. */
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extern int sched_yield (void) __THROW;
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/* Get maximum priority value for a scheduler. */
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extern int sched_get_priority_max (int __algorithm) __THROW;
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/* Get minimum priority value for a scheduler. */
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extern int sched_get_priority_min (int __algorithm) __THROW;
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/* Get the SCHED_RR interval for the named process. */
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#ifndef __USE_TIME_BITS64
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extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
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#else
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# ifdef __REDIRECT_NTH
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extern int __REDIRECT_NTH (sched_rr_get_interval,
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(__pid_t __pid, struct timespec *__t),
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__sched_rr_get_interval64);
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# else
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# define sched_rr_get_interval __sched_rr_get_interval64
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# endif
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#endif
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#ifdef __USE_GNU
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/* Access macros for `cpu_set'. */
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# define CPU_SETSIZE __CPU_SETSIZE
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# define CPU_SET(cpu, cpusetp) __CPU_SET_S (cpu, sizeof (cpu_set_t), cpusetp)
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# define CPU_CLR(cpu, cpusetp) __CPU_CLR_S (cpu, sizeof (cpu_set_t), cpusetp)
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# define CPU_ISSET(cpu, cpusetp) __CPU_ISSET_S (cpu, sizeof (cpu_set_t), \
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cpusetp)
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# define CPU_ZERO(cpusetp) __CPU_ZERO_S (sizeof (cpu_set_t), cpusetp)
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# define CPU_COUNT(cpusetp) __CPU_COUNT_S (sizeof (cpu_set_t), cpusetp)
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# define CPU_SET_S(cpu, setsize, cpusetp) __CPU_SET_S (cpu, setsize, cpusetp)
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# define CPU_CLR_S(cpu, setsize, cpusetp) __CPU_CLR_S (cpu, setsize, cpusetp)
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# define CPU_ISSET_S(cpu, setsize, cpusetp) __CPU_ISSET_S (cpu, setsize, \
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cpusetp)
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# define CPU_ZERO_S(setsize, cpusetp) __CPU_ZERO_S (setsize, cpusetp)
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# define CPU_COUNT_S(setsize, cpusetp) __CPU_COUNT_S (setsize, cpusetp)
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# define CPU_EQUAL(cpusetp1, cpusetp2) \
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__CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2)
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# define CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
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__CPU_EQUAL_S (setsize, cpusetp1, cpusetp2)
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# define CPU_AND(destset, srcset1, srcset2) \
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__CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, &)
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# define CPU_OR(destset, srcset1, srcset2) \
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__CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |)
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# define CPU_XOR(destset, srcset1, srcset2) \
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__CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, ^)
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# define CPU_AND_S(setsize, destset, srcset1, srcset2) \
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__CPU_OP_S (setsize, destset, srcset1, srcset2, &)
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# define CPU_OR_S(setsize, destset, srcset1, srcset2) \
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__CPU_OP_S (setsize, destset, srcset1, srcset2, |)
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# define CPU_XOR_S(setsize, destset, srcset1, srcset2) \
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__CPU_OP_S (setsize, destset, srcset1, srcset2, ^)
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# define CPU_ALLOC_SIZE(count) __CPU_ALLOC_SIZE (count)
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# define CPU_ALLOC(count) __CPU_ALLOC (count)
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# define CPU_FREE(cpuset) __CPU_FREE (cpuset)
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/* Set the CPU affinity for a task */
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extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize,
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const cpu_set_t *__cpuset) __THROW;
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/* Get the CPU affinity for a task */
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extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize,
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cpu_set_t *__cpuset) __THROW;
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#endif
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__END_DECLS
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#endif /* sched.h */
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