2 * Copyright (c) 2004-2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/sys/syslink_msg2.h,v 1.4 2007/08/13 17:47:20 dillon Exp $
37 * Helper inlines and macros for syslink message generation
40 #ifndef _SYS_SYSLINK_MSG2_H_
41 #define _SYS_SYSLINK_MSG2_H_
43 #ifndef _SYS_SYSLINK_H_
44 #include <sys/syslink.h>
46 #ifndef _SYS_SYSLINK_MSG_H_
47 #include <sys/syslink_msg.h>
52 sl_msg_init_cmd(struct syslink_msg *msg, sl_proto_t proto, sl_cmd_t cmd)
54 msg->sm_proto = proto;
56 /* rlabel will be filled in by the transport layer */
57 /* msgid will be filled in by the transport layer */
58 msg->sm_head.se_cmd = cmd;
59 msg->sm_head.se_bytes = sizeof(struct syslink_elm);
60 msg->sm_head.se_aux = 0;
61 return(&msg->sm_head);
66 sl_msg_init_reply(struct syslink_msg *msg, struct syslink_msg *rep,
69 rep->sm_proto = msg->sm_proto | SM_PROTO_REPLY;
71 rep->sm_rlabel = msg->sm_rlabel;
72 rep->sm_msgid = msg->sm_msgid;
73 rep->sm_head.se_cmd = msg->sm_head.se_cmd | SE_CMDF_REPLY;
74 rep->sm_head.se_bytes = sizeof(struct syslink_elm);
75 rep->sm_head.se_aux = error;
76 return(&rep->sm_head);
81 sl_msg_fini(struct syslink_msg *msg)
83 msg->sm_bytes = __offsetof(struct syslink_msg, sm_head) +
84 SL_MSG_ALIGN(msg->sm_head.se_bytes);
89 sl_elm_make(struct syslink_elm *par, sl_cmd_t cmd, int bytes)
91 struct syslink_elm *elm = (void *)((char *)par + par->se_bytes);
93 KKASSERT((cmd & SE_CMDF_STRUCTURED) == 0);
95 elm->se_bytes = sizeof(*elm) + bytes;
98 par->se_bytes += SL_MSG_ALIGN(elm->se_bytes);
104 sl_elm_make_aux(struct syslink_elm *par, sl_cmd_t cmd, int auxdata)
106 struct syslink_elm *elm = (void *)((char *)par + par->se_bytes);
108 KKASSERT((cmd & SE_CMDF_STRUCTURED) == 0);
110 elm->se_bytes = sizeof(*elm);
111 elm->se_aux = auxdata;
113 par->se_bytes += SL_MSG_ALIGN(elm->se_bytes);
118 * Push a new element given the current element, creating a recursion
119 * under the current element.
123 sl_elm_push(struct syslink_elm *par, sl_cmd_t cmd)
125 struct syslink_elm *elm = (void *)((char *)par + par->se_bytes);
127 KKASSERT(cmd & SE_CMDF_STRUCTURED);
129 elm->se_bytes = sizeof(struct syslink_elm);
136 * Pop a previously pushed element. Additional array elements may be
137 * added to the parent by continuing to push/pop using the parent.
141 sl_elm_pop(struct syslink_elm *par, struct syslink_elm *elm)
143 par->se_bytes = (char *)elm - (char *)par + elm->se_bytes;
146 #define SL_FOREACH_ELEMENT(par, elm) \
147 for (elm = par + 1; (char *)elm < (char *)par + par->se_bytes; \
148 elm = (void *)((char *)elm + SL_MSG_ALIGN(elm->se_bytes)))