diff options
Diffstat (limited to 'sys/posix4')
-rw-r--r-- | sys/posix4/ksem.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sys/posix4/ksem.h b/sys/posix4/ksem.h new file mode 100644 index 0000000..29b0a53 --- /dev/null +++ b/sys/posix4/ksem.h @@ -0,0 +1,55 @@ +/*- + * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _POSIX4_KSEM_H_ +#define _POSIX4_KSEM_H_ + +#ifndef _KERNEL +#error "no user-servicable parts inside" +#endif + +struct kuser { + pid_t ku_pid; + LIST_ENTRY(kuser) ku_next; +}; + +struct ksem { + LIST_ENTRY(ksem) ks_entry; /* global list entry */ + int ks_onlist; /* boolean if on a list (ks_entry) */ + char *ks_name; /* if named, this is the name */ + int ks_ref; /* number of references */ + mode_t ks_mode; /* protection bits */ + uid_t ks_uid; /* creator uid */ + gid_t ks_gid; /* creator gid */ + unsigned int ks_value; /* current value */ + struct cv ks_cv; /* waiters sleep here */ + int ks_waiters; /* number of waiters */ + LIST_HEAD(, kuser) ks_users; /* pids using this sem */ +}; + +#endif /* !_POSIX4_KSEM_H_ */ |