2 * lwpint.h -- lwp internal structures
4 * Copyright (C) 1991-3 Stephen Crane.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the Free
18 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 * author: Stephen Crane, (jsc@doc.ic.ac.uk), Department of Computing,
21 * Imperial College of Science, Technology and Medicine, 180 Queen's
22 * Gate, London SW7 2BZ, England.
27 /* `liveness' counter: check signals every `n' visits to the scheduler */
28 /* note: the lower this value, the more responsive the system but the */
29 /* more inefficient the context switch time */
33 extern struct lwpProc *initcontext;
34 extern int startpoint;
39 void lwpRestore(jmp_buf);
42 #if defined(MIPS) || defined(AIX32) || defined(ALPHA) || defined(__vax)
44 void lwpRestore(jmp_buf);
46 #define lwpSave(x) _setjmp(x)
47 #define lwpRestore(x) _longjmp(x, 1)
48 #elif defined (UCONTEXT)
49 #define lwpSave(x) getcontext(&(x))
50 #define lwpRestore(x) setcontext(&(x))
53 #define lwpSave(x) setjmp(x)
54 #define lwpRestore(x) longjmp(x, 1)
57 #define lwpSave(x) setjmp(x)
58 #define lwpRestore(x) longjmp(x, 1)
64 /* AIX needs 12 extra bytes above the stack; we add it here */
65 #define LWP_EXTRASTACK 3*sizeof(long)
67 #define LWP_EXTRASTACK 0
70 #define LWP_REDZONE 1024 /* make this a multiple of 1024 */
72 /* XXX Note that this assumes sizeof(long) == 4 */
73 #define LWP_CHECKMARK 0x5a5a5a5aL
75 #define SIGNALS sigmask(SIGALRM)
78 typedef double stkalign_t;
85 /* internal routines */
86 void lwpAddTail(struct lwpQueue *, struct lwpProc *);
87 struct lwpProc *lwpGetFirst(struct lwpQueue *);
88 void lwpReschedule(void);
89 void lwpReady(struct lwpProc *);
90 void lwpOnalarm(void);
93 void lwpInitContext(struct lwpProc *, stack_t *);
94 #else /* GETCONTEXT */
96 void lwpInitContext(struct lwpProc *, void *);
99 void lwpInitContext(volatile struct lwpProc * volatile, void *);
101 void lwpInitContext(struct lwpProc *, void *);
104 #endif /* GETCONTEXT */
105 void lwpEntryPoint(void);
106 void lwpInitSelect(struct lwpProc * self);
107 void lwpDestroy(struct lwpProc * proc);