4 * Implements LWKT messages and ports.
6 * $DragonFly: src/sys/sys/msgport.h,v 1.6 2003/07/30 00:19:16 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 * NOTE! 64-bit-align this structure.
32 typedef struct lwkt_msg {
33 TAILQ_ENTRY(lwkt_msg) ms_node; /* link node (not always used) */
35 struct lwkt_msg *ms_next; /* chaining / cache */
36 union sysmsg *ms_sysnext; /* chaining / cache */
37 struct lwkt_msg *ms_umsg; /* user message (UVA address) */
39 lwkt_port_t ms_target_port; /* only used in certain situations */
40 lwkt_port_t ms_reply_port; /* asynch replies returned here */
41 int ms_abortreq; /* set asynchronously */
46 void *ms_resultp; /* misc pointer result */
47 int ms_result; /* standard 'int'eger result */
48 long ms_lresult; /* long result */
49 int ms_fds[2]; /* two int bit results */
50 int32_t ms_result32; /* 32 bit result */
51 int64_t ms_result64; /* 64 bit result */
52 off_t ms_offset; /* off_t result */
54 int ms_pad[2]; /* future use */
57 #define MSGF_DONE 0x0001 /* asynch message is complete */
58 #define MSGF_REPLY 0x0002 /* asynch message has been returned */
59 #define MSGF_QUEUED 0x0004 /* message has been queued sanitychk */
60 #define MSGF_ASYNC 0x0008 /* sync/async hint */
62 #define MSG_CMD_CDEV 0x00010000
63 #define MSG_CMD_VFS 0x00020000
64 #define MSG_CMD_SYSCALL 0x00030000
65 #define MSG_SUBCMD_MASK 0x0000FFFF
67 typedef struct lwkt_port {
68 lwkt_msg_queue mp_msgq;
71 int (*mp_beginmsg)(lwkt_port_t port, lwkt_msg_t msg);
72 void (*mp_abortmsg)(lwkt_port_t port, lwkt_msg_t msg);
73 void (*mp_returnmsg)(lwkt_port_t port, lwkt_msg_t msg);
76 #define MSGPORTF_WAITING 0x0001
80 extern void lwkt_init_port(lwkt_port_t port, struct thread *td);
81 extern void lwkt_initmsg_td(lwkt_msg_t msg, struct thread *td);
82 extern void lwkt_sendmsg(lwkt_port_t port, lwkt_msg_t msg);
83 extern int lwkt_domsg(lwkt_port_t port, lwkt_msg_t msg);
84 extern int lwkt_waitmsg(lwkt_msg_t msg);
85 extern void lwkt_replyport(lwkt_port_t port, lwkt_msg_t msg);
86 extern void lwkt_abortport(lwkt_port_t port, lwkt_msg_t msg);
87 extern int lwkt_putport(lwkt_port_t port, lwkt_msg_t msg);
88 extern void *lwkt_getport(lwkt_port_t port);
89 extern void *lwkt_waitport(lwkt_port_t port);