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* hurd/hurd.h (__hurd_fail): Always declare function, and provide inline version only if __USE_EXTERN_INLINES is defined. * hurd/hurd/fd.h (_hurd_fd_error_signal, _hurd_fd_error, __hurd_dfail, __hurd_sockfail): Likewise. (_hurd_fd_get): Always declare functions, and provide inline versions only if __USE_EXTERN_INLINES and _LIBC are defined and IS_IN(libc). * hurd/hurd/port.h (_hurd_port_init, _hurd_port_locked_get, _hurd_port_get, _hurd_port_free, _hurd_port_locked_set, _hurd_port_set): Always declare functions, and provide inline versions only if __USE_EXTERN_INLINES and _LIBC are defined and IS_IN(libc). * hurd/hurd/signal.h (_hurd_self_sigstate, _hurd_critical_section_lock, _hurd_critical_section_unlock): Likewise. * hurd/hurd/threadvar.h (__hurd_threadvar_location_from_sp, * __hurd_threadvar_location): Likewise. * hurd/hurd/userlink.h (_hurd_userlink_link, _hurd_userlink_unlink, _hurd_userlink_clear): Likewise. * mach/lock-intern.h (__spin_lock_init, __spin_lock, __mutex_lock, __mutex_unlock, __mutex_trylock): Always declare functions, and provide inline versions only if __USE_EXTERN_INLINES and _LIBC are defined. * mach/mach/mig_support.h (__mig_strncpy): Likewise. * sysdeps/generic/machine-lock.h (__spin_unlock, __spin_try_lock, __spin_lock_locked): Likewise. * sysdeps/mach/i386/machine-lock.h (__spin_unlock, __spin_try_lock, __spin_lock_locked): Likewise. * mach/spin-lock.c (__USE_EXTERN_INLINES): Define to 1. * hurd/Versions (libc: GLIBC_2.27): Add _hurd_fd_error_signal, _hurd_fd_error, __hurd_dfail, __hurd_sockfail, _hurd_port_locked_set, __hurd_threadvar_location_from_sp, __hurd_threadvar_location, _hurd_userlink_link, _hurd_userlink_unlink, _hurd_userlink_clear.
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* Machine-specific definition for spin locks. Stub version.
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Copyright (C) 1994-2018 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 _MACHINE_LOCK_H
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#define _MACHINE_LOCK_H
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/* The type of a spin lock variable. */
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typedef volatile int __spin_lock_t;
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/* Value to initialize `__spin_lock_t' variables to. */
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#define __SPIN_LOCK_INITIALIZER 0
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#ifndef _EXTERN_INLINE
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#define _EXTERN_INLINE __extern_inline
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#endif
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/* Unlock LOCK. */
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extern void __spin_unlock (__spin_lock_t *__lock);
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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_EXTERN_INLINE void
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__spin_unlock (__spin_lock_t *__lock)
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{
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*__lock = 0;
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}
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#endif
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/* Try to lock LOCK; return nonzero if we locked it, zero if another has. */
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extern int __spin_try_lock (__spin_lock_t *__lock);
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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_EXTERN_INLINE int
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__spin_try_lock (__spin_lock_t *__lock)
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{
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if (*__lock)
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return 0;
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*__lock = 1;
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return 1;
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}
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#endif
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/* Return nonzero if LOCK is locked. */
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extern int __spin_lock_locked (__spin_lock_t *__lock);
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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_EXTERN_INLINE int
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__spin_lock_locked (__spin_lock_t *__lock)
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{
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return *__lock != 0;
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}
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#endif
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#endif /* machine-lock.h */
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