4 * Implements LWKT messages and ports.
6 * $DragonFly: src/sys/sys/msgport.h,v 1.2 2003/07/22 17:03:34 dillon Exp $
9 #ifndef _SYS_MSGPORT_H_
10 #define _SYS_MSGPORT_H_
13 #include <sys/queue.h> /* TAILQ_* macros */
20 typedef struct lwkt_msg *lwkt_msg_t;
21 typedef struct lwkt_port *lwkt_port_t;
23 typedef TAILQ_HEAD(lwkt_msg_queue, lwkt_msg) lwkt_msg_queue;
26 * The standard message and port structure for communications between
27 * threads. See kern/lwkt_msgport.c for documentation on how messages and
30 typedef struct lwkt_msg {
31 TAILQ_ENTRY(lwkt_msg) ms_node; /* link node (not always used) */
32 lwkt_port_t ms_target_port; /* only used in certain situations */
33 lwkt_port_t ms_reply_port; /* asynch replies returned here */
34 int ms_abortreq; /* set asynchronously */
40 #define MSGF_DONE 0x0001 /* asynch message is complete */
41 #define MSGF_REPLY 0x0002 /* asynch message has been returned */
42 #define MSGF_QUEUED 0x0004 /* message has been queued sanitychk */
43 #define MSGF_ASYNC 0x0008 /* sync/async hint */
45 #define MSG_CMD_CDEV 0x00010000
46 #define MSG_CMD_VFS 0x00020000
47 #define MSG_CMD_SYSCALL 0x00030000
48 #define MSG_SUBCMD_MASK 0x0000FFFF
50 typedef struct lwkt_port {
51 lwkt_msg_queue mp_msgq;
54 int (*mp_beginmsg)(lwkt_port_t port, lwkt_msg_t msg);
55 void (*mp_abortmsg)(lwkt_port_t port, lwkt_msg_t msg);
56 void (*mp_returnmsg)(lwkt_port_t port, lwkt_msg_t msg);
59 #define MSGPORTF_WAITING 0x0001
63 extern void lwkt_init_port(lwkt_port_t port, struct thread *td);
64 extern void lwkt_sendmsg(lwkt_port_t port, lwkt_msg_t msg);
65 extern int lwkt_domsg(lwkt_port_t port, lwkt_msg_t msg);
66 extern int lwkt_waitmsg(lwkt_msg_t msg);
67 extern void lwkt_replyport(lwkt_port_t port, lwkt_msg_t msg);
68 extern void lwkt_abortport(lwkt_port_t port, lwkt_msg_t msg);
69 extern int lwkt_putport(lwkt_port_t port, lwkt_msg_t msg);
70 extern void *lwkt_getport(lwkt_port_t port);
71 extern void *lwkt_waitport(lwkt_port_t port);