diff options
Diffstat (limited to 'usr.sbin/afs/src/lwp/q.c')
| -rw-r--r-- | usr.sbin/afs/src/lwp/q.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/usr.sbin/afs/src/lwp/q.c b/usr.sbin/afs/src/lwp/q.c new file mode 100644 index 00000000000..5acf8286227 --- /dev/null +++ b/usr.sbin/afs/src/lwp/q.c @@ -0,0 +1,54 @@ +/* $OpenBSD: q.c,v 1.1.1.1 1998/09/14 21:53:13 art Exp $ */ +/* + * Emulate the vax instructions for queue insertion and deletion, somewhat. + * A std_queue structure is defined here and used by these routines. These + * routines use caddr_ts so they can operate on any structure. The std_queue + * structure is used rather than proc structures so that when the proc struct + * changes only process management code breaks. The ideal solution would be + * to define a std_queue as a global type which is part of all the structures + * which are manipulated by these routines. This would involve considerable + * effort... + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +RCSID("$KTH: q.c,v 1.7 1998/02/12 01:03:14 assar Exp $") ; +#endif + +#include <stdio.h> +#include <sys/types.h> +#include <sys/time.h> +#ifdef HAVE_SYS_CDEFS_H +#include <sys/cdefs.h> +#endif +#include <utime.h> + +/* Ansified, made more readable, and mayby fixed /lha */ + +struct std_queue { + struct std_queue *q_link; + struct std_queue *q_rlink; +} ; + +void lwp_insque(void *elementp, void *quep) +{ + struct std_queue *que = (struct std_queue *) quep ; + struct std_queue *element = (struct std_queue *) elementp ; + + element->q_link = que->q_link; + element->q_rlink = que; + + que->q_link->q_rlink = element; + que->q_link = element; +} + +void lwp_remque(void *elementp) +{ + struct std_queue *element = (struct std_queue *) elementp ; + + element->q_link->q_rlink = element->q_rlink; + element->q_rlink->q_link = element->q_link; + + element->q_rlink = element->q_link = (struct std_queue *) 0; +} + |