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05b68e14b1
Many headers are expected to expose a subset of the type definitions
in time.h. time.h has a whole bunch of messy logic for conditionally
defining some its types and structs, but, as best I can tell, this
has never worked 100%. In particular, __need_timespec is ineffective
if _TIME_H has already been defined, which means that if you compile
#include <time.h>
#include <sched.h>
with e.g. -fsyntax-only -std=c89 -Wall -Wsystem-headers, you will get
In file included from test.c:2:0:
/usr/include/sched.h:74:57: warning: "struct timespec" declared inside
parameter list will not be visible outside of this definition or declaration
extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
^~~~~~~~
And if you want to _use_ sched_rr_get_interval in a TU compiled that
way, you're hosed.
This patch replaces all of that with small bits/types/TYPE.h headers
as introduced earlier. time.h and bits/time.h are now *much* simpler,
and a lot of other headers are slightly simpler.
* time/time.h, bits/time.h, sysdeps/unix/sysv/linux/bits/time.h:
Remove all logic conditional on __need macros. Move all the
conditionally defined types to their own headers...
* time/bits/types/clock_t.h: Define clock_t here.
* time/bits/types/clockid_t.h: Define clockid_t here.
* time/bits/types/struct_itimerspec.h: Define struct itimerspec here.
* time/bits/types/struct_timespec.h: Define struct timespec here.
* time/bits/types/struct_timeval.h: Define struct timeval here.
* time/bits/types/struct_tm.h: Define struct tm here.
* time/bits/types/time_t.h: Define time_t here.
* time/bits/types/timer_t.h: Define timer_t here.
* time/Makefile: Install the new headers.
* bits/resource.h, io/fcntl.h, io/sys/poll.h, io/sys/stat.h
* io/utime.h, misc/sys/select.h, posix/sched.h, posix/sys/times.h
* posix/sys/types.h, resolv/netdb.h, rt/aio.h, rt/mqueue.h
* signal/signal.h, pthread/semaphore.h, sysdeps/nptl/pthread.h
* sysdeps/unix/sysv/linux/alpha/bits/resource.h
* sysdeps/unix/sysv/linux/alpha/sys/acct.h
* sysdeps/unix/sysv/linux/bits/resource.h
* sysdeps/unix/sysv/linux/bits/timex.h
* sysdeps/unix/sysv/linux/mips/bits/resource.h
* sysdeps/unix/sysv/linux/net/ppp_defs.h
* sysdeps/unix/sysv/linux/sparc/bits/resource.h
* sysdeps/unix/sysv/linux/sys/acct.h
* sysdeps/unix/sysv/linux/sys/timerfd.h
* sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h
* time/sys/time.h, time/sys/timeb.h
Use the new bits/types headers.
* include/time.h: Remove __need logic.
* include/bits/time.h
* include/bits/types/clock_t.h, include/bits/types/clockid_t.h
* include/bits/types/time_t.h, include/bits/types/timer_t.h
* include/bits/types/struct_itimerspec.h
* include/bits/types/struct_timespec.h
* include/bits/types/struct_timeval.h
* include/bits/types/struct_tm.h:
New wrapper headers.
130 lines
4.6 KiB
C
130 lines
4.6 KiB
C
/* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface.
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Copyright (C) 1996-2016 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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<http://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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/* Define the real names for the elements of `struct sched_param'. */
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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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extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
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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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