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.
32 #define LWP_STACKCHECK 0x1
35 /* process control block. do *not* change the position of context */
38 ucontext_t context; /* context structure */
40 jmp_buf context; /* processor context area */
42 void *sbtm; /* bottom of stack attached to it */
43 int size; /* size of stack */
44 void (*entry)(void *); /* entry point */
45 int dead; /* whether the process can be rescheduled */
46 int pri; /* which scheduling queue we're on */
47 long runtime; /* time at which process is restarted */
48 int fd; /* fd we're blocking on */
49 int argc; /* initial arguments */
51 void *ud; /* user data */
52 void *lowmark; /* start of low buffer around stack */
53 void *himark; /* start of upper buffer around stack */
54 char *name; /* process name and description */
73 #define LWP_FD_READ 0x1
74 #define LWP_FD_WRITE 0x2
76 #define LWP_MAX_PRIO 8
78 struct lwpProc *lwpInitSystem(int prio, char **ctxp, int flags);
79 struct lwpProc *lwpCreate(int prio, void (*)(void *), int size,
80 int flags, char *name, char *desc,
81 int argc, char **argv, void *ud);
83 void lwpTerminate(struct lwpProc * p);
85 void lwpSleepFd(int fd, int flags);
86 void lwpSleepUntil(long until);
87 void lwpWakeupFd(struct lwpProc * p);
88 void *lwpGetUD(struct lwpProc * p);
89 void lwpSetUD(struct lwpProc * p, char *ud);
90 void lwpSetDesc(struct lwpProc * p, char *name, char *desc);
91 int lwpSetPriority(int prio);
92 void lwpReschedule(void);
94 struct lwpSem *lwpCreateSem(char *name, int count);
95 void lwpSignal(struct lwpSem *);
96 void lwpWait(struct lwpSem *);
97 void lwpSelect(void *);
98 void lwpStatus(struct lwpProc *proc, char *format, ...)
99 ATTRIBUTE((format (printf, 2, 3)));
101 extern struct lwpProc *LwpCurrent;
103 #include "prototypes.h" /* must come at end, after defines and typedefs */