Throw better sanity checks into vfs_hang_addrlist() for argp->ex_addrlen
[dragonfly.git] / sys / sys / msgport.h
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1/*
2 * SYS/MSGPORT.H
3 *
4 * Implements LWKT messages and ports.
5 *
6 * $DragonFly: src/sys/sys/msgport.h,v 1.1 2003/07/20 01:37:22 dillon Exp $
7 */
8
9#ifndef _SYS_MSGPORT_H_
10#define _SYS_MSGPORT_H_
11
12#ifndef _SYS_QUEUE_H_
13#include <sys/queue.h> /* TAILQ_* macros */
14#endif
15
16struct lwkt_msg;
17struct lwkt_port;
18
19typedef struct lwkt_msg *lwkt_msg_t;
20typedef struct lwkt_port *lwkt_port_t;
21
22/*
23 * The standard message and port structure for communications between
24 * threads. See kern/lwkt_msgport.c for documentation on how messages and
25 * ports work.
26 */
27typedef struct lwkt_msg {
28 TAILQ_ENTRY(lwkt_msg) ms_node; /* link node (not always used) */
29 lwkt_port_t ms_target_port; /* only used in certain situations */
30 lwkt_port_t ms_reply_port; /* asynch replies returned here */
31 int ms_abortreq; /* set asynchronously */
32 int ms_cmd;
33 int ms_flags;
34 int ms_error;
35} lwkt_msg;
36
37#define MSGF_DONE 0x0001 /* asynch message is complete */
38#define MSGF_REPLY 0x0002 /* asynch message has been returned */
39#define MSGF_QUEUED 0x0004 /* message has been queued sanitychk */
40#define MSGF_ASYNC 0x0008 /* sync/async hint */
41
42typedef struct lwkt_port {
43 lwkt_msg_queue mp_msgq;
44 int mp_flags;
45 thread_t mp_td;
46 int (*mp_beginmsg)(lwkt_port_t port, lwkt_msg_t msg);
47 void (*mp_abortmsg)(lwkt_port_t port, lwkt_msg_t msg);
48 void (*mp_returnmsg)(lwkt_port_t port, lwkt_msg_t msg);
49} lwkt_port;
50
51#define MSGPORTF_WAITING 0x0001
52
53#ifdef _KERNEL
54
55extern void lwkt_init_port(lwkt_port_t port, thread_t td);
56extern void lwkt_sendmsg(lwkt_port_t port, lwkt_msg_t msg);
57extern int lwkt_domsg(lwkt_port_t port, lwkt_msg_t msg);
58extern int lwkt_waitmsg(lwkt_msg_t msg);
59extern void lwkt_replyport(lwkt_port_t port, lwkt_msg_t msg);
60extern void lwkt_abortport(lwkt_port_t port, lwkt_msg_t msg);
61extern int lwkt_putport(lwkt_port_t port, lwkt_msg_t msg);
62extern void *lwkt_getport(lwkt_port_t port);
63extern void *lwkt_waitport(lwkt_port_t port);
64
65#endif
66
67#endif