1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)remque.c 5.2 (Berkeley) 07/21/88"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 /* 23 * remque -- vax remque instruction 24 * 25 * NOTE: this implementation is non-atomic!! 26 */ 27 28 struct vaxque { /* queue format expected by VAX queue instructions */ 29 struct vaxque *vq_next; 30 struct vaxque *vq_prev; 31 }; 32 33 remque(e) 34 register struct vaxque *e; 35 { 36 e->vq_prev->vq_next = e->vq_next; 37 e->vq_next->vq_prev = e->vq_prev; 38 } 39