2 * lwp.h -- prototypes and structures for lightweight processes
3 * Copyright (C) 1991-3 Stephen Crane.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 * author: Stephen Crane, (jsc@doc.ic.ac.uk), Department of Computing,
20 * Imperial College of Science, Technology and Medicine, 180 Queen's
21 * Gate, London SW7 2BZ, England.
25 #include "prototype.h"
33 #define LWP_STACKCHECK 0x1
36 /* process control block. do *not* change the position of context */
39 ucontext_t context; /* context structure */
41 jmp_buf context; /* processor context area */
43 void *sbtm; /* bottom of stack attached to it */
44 int size; /* size of stack */
45 void (*entry)(); /* entry point */
46 int dead; /* whether the process can be rescheduled */
47 int pri; /* which scheduling queue we're on */
48 long runtime; /* time at which process is restarted */
49 int fd; /* fd we're blocking on */
50 int argc; /* initial arguments */
52 void *ud; /* user data */
53 void *lowmark; /* start of low buffer around stack */
54 void *himark; /* start of upper buffer around stack */
55 char *name; /* process name and description */
74 #define LWP_FD_READ 0x1
75 #define LWP_FD_WRITE 0x2
77 #define LWP_MAX_PRIO 8
79 struct lwpProc *lwpInitSystem _PROTO((int prio, char **ctxp, int flags));
80 struct lwpProc *lwpCreate _PROTO((int prio, void (*)(), int size,
81 int flags, char *name, char *desc, int argc,
82 char **argv, void *ud));
83 void lwpExit _PROTO((void));
84 void lwpTerminate _PROTO((struct lwpProc *p));
85 void lwpYield _PROTO((void));
86 void lwpSleepFd _PROTO((int fd, int flags));
87 void lwpSleepUntil _PROTO((long until));
88 void lwpWakeupFd _PROTO((struct lwpProc *p));
89 void *lwpGetUD _PROTO((struct lwpProc *p));
90 void lwpSetUD _PROTO((struct lwpProc *p, char *ud));
91 void lwpSetDesc _PROTO((struct lwpProc *p, char *name, char *desc));
92 int lwpSetPriority _PROTO((int prio));
93 void lwpReschedule _PROTO((void));
95 struct lwpSem *lwpCreateSem _PROTO((char *name, int count));
96 void lwpSignal _PROTO((struct lwpSem *));
97 void lwpWait _PROTO((struct lwpSem *));
98 void lwpSelect _PROTO((int argc, char **argv));
99 void lwpStatus _PROTO((struct lwpProc *proc, char *format, ...));
101 extern struct lwpProc *LwpCurrent;
103 #include "prototypes.h" /* must come at end, after defines and typedefs */