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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.
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* Copyright (C) 2002-2016 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 _SEMAPHORE_H
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#define _SEMAPHORE_H 1
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#include <features.h>
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#include <sys/types.h>
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#ifdef __USE_XOPEN2K
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# include <bits/types/struct_timespec.h>
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#endif
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/* Get the definition for sem_t. */
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#include <bits/semaphore.h>
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__BEGIN_DECLS
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/* Initialize semaphore object SEM to VALUE. If PSHARED then share it
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with other processes. */
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extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value)
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__THROW;
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/* Free resources associated with semaphore object SEM. */
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extern int sem_destroy (sem_t *__sem) __THROW;
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/* Open a named semaphore NAME with open flags OFLAG. */
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extern sem_t *sem_open (const char *__name, int __oflag, ...) __THROW;
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/* Close descriptor for named semaphore SEM. */
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extern int sem_close (sem_t *__sem) __THROW;
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/* Remove named semaphore NAME. */
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extern int sem_unlink (const char *__name) __THROW;
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/* Wait for SEM being posted.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int sem_wait (sem_t *__sem);
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#ifdef __USE_XOPEN2K
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/* Similar to `sem_wait' but wait only until ABSTIME.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int sem_timedwait (sem_t *__restrict __sem,
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const struct timespec *__restrict __abstime);
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#endif
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/* Test whether SEM is posted. */
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extern int sem_trywait (sem_t *__sem) __THROWNL;
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/* Post SEM. */
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extern int sem_post (sem_t *__sem) __THROWNL;
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/* Get current value of SEM and store it in *SVAL. */
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extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval)
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__THROW;
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__END_DECLS
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#endif /* semaphore.h */
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