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553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
102 lines
3.4 KiB
C
Vendored
102 lines
3.4 KiB
C
Vendored
/* $NetBSD: ksem.h,v 1.15.30.1 2023/08/09 17:42:01 martin Exp $ */
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/*
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* Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_KSEM_H_
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#define _SYS_KSEM_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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struct timespec;
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#ifdef _KERNEL
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#include <sys/condvar.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#ifndef _KMEMUSER /* XXX hack for fstat(8) */
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#include <sys/systm.h>
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#endif
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struct lwp;
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struct proc;
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#define KSEM_MAX 128
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typedef struct ksem {
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LIST_ENTRY(ksem) ks_entry; /* global list entry */
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struct proc * ks_pshared_proc;/* owner of pshared sem */
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intptr_t ks_pshared_id; /* global id for pshared sem */
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kmutex_t ks_lock; /* lock on this ksem */
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kcondvar_t ks_cv; /* condition variable */
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u_int ks_pshared_fd; /* fd in owning proc */
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u_int ks_ref; /* number of references */
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u_int ks_value; /* current value */
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u_int ks_waiters; /* number of waiters */
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char * ks_name; /* name, if named */
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size_t ks_namelen; /* length of name */
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int ks_flags; /* for KS_UNLINKED */
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mode_t ks_mode; /* protection bits */
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uid_t ks_uid; /* creator uid */
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gid_t ks_gid; /* creator gid */
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} ksem_t;
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int do_ksem_init(struct lwp *, unsigned int, intptr_t *, copyin_t, copyout_t);
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int do_ksem_open(struct lwp *, const char *, int, mode_t, unsigned int,
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intptr_t *, copyout_t);
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int do_ksem_wait(struct lwp *, intptr_t, bool, struct timespec *);
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extern int ksem_max;
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#endif /* _KERNEL */
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#if defined(_KERNEL) || defined(_LIBC)
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#define KSEM_PSHARED 0x50535244U /* 'PSRD' */
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#define KSEM_MARKER_MASK 0xff000001U
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#define KSEM_MARKER_MIN 0x01000001U
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#define KSEM_PSHARED_MARKER 0x70000001U /* 'p' << 24 | 1 */
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#endif /* _KERNEL || _LIBC */
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#ifdef _LIBC
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__BEGIN_DECLS
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int _ksem_close(intptr_t);
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int _ksem_destroy(intptr_t);
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int _ksem_getvalue(intptr_t, int *);
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int _ksem_init(unsigned int, intptr_t *);
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int _ksem_open(const char *, int, mode_t, unsigned int, intptr_t *);
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int _ksem_post(intptr_t);
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int _ksem_timedwait(intptr_t, const struct timespec * __restrict);
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int _ksem_trywait(intptr_t);
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int _ksem_unlink(const char *);
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int _ksem_wait(intptr_t);
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__END_DECLS
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#endif /* _LIBC */
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#endif /* _SYS_KSEM_H_ */ |