1 /* $NetBSD: prop_stack.h,v 1.1 2007/08/16 21:44:08 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Joerg Sonnenberger <joerg@NetBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _PROP_STACK_H 33 #define _PROP_STACK_H 34 35 #include <sys/queue.h> 36 37 #include <prop/prop_object.h> 38 39 struct _prop_stack_intern_elem { 40 prop_object_t object; 41 void *object_data; 42 void *iterator; 43 }; 44 45 struct _prop_stack_extern_elem { 46 SLIST_ENTRY(_prop_stack_extern_elem) stack_link; 47 prop_object_t object; 48 void *object_data; 49 void *iterator; 50 }; 51 52 #define PROP_STACK_INTERN_ELEMS 16 53 54 struct _prop_stack { 55 struct _prop_stack_intern_elem intern_elems[PROP_STACK_INTERN_ELEMS]; 56 size_t used_intern_elems; 57 SLIST_HEAD(, _prop_stack_extern_elem) extern_elems; 58 }; 59 60 typedef struct _prop_stack *prop_stack_t; 61 62 void _prop_stack_init(prop_stack_t); 63 bool _prop_stack_push(prop_stack_t, prop_object_t, void *, void *); 64 bool _prop_stack_pop(prop_stack_t, prop_object_t *, void **, void **); 65 66 #endif 67