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 void lwpInitContext(struct lwpProc *, stack_t *);
34 #define lwpSave(x) getcontext(&(x))
35 #define lwpRestore(x) setcontext(&(x))
37 #if defined(hpux) && !defined(hpc)
38 void lwpInitContext(volatile struct lwpProc * volatile, void *);
40 void lwpInitContext(struct lwpProc *, void *);
44 #define lwpRestore(x) longjmp(x, 1)
45 #elif defined(hpux) || defined(AIX32) || defined(ALPHA)
47 void lwpRestore(jmp_buf);
49 #define lwpSave(x) _setjmp(x)
50 #define lwpRestore(x) _longjmp(x, 1)
52 #define lwpSave(x) setjmp(x)
53 #define lwpRestore(x) longjmp(x, 1)
55 #endif /* !UCONTEXT */
58 /* AIX needs 12 extra bytes above the stack; we add it here */
59 #define LWP_EXTRASTACK 3*sizeof(long)
61 #define LWP_EXTRASTACK 0
64 #define LWP_REDZONE 1024 /* make this a multiple of 1024 */
66 /* XXX Note that this assumes sizeof(long) == 4 */
67 #define LWP_CHECKMARK 0x5a5a5a5aL
74 typedef double stkalign_t;
77 /* internal routines */
78 void lwpAddTail(struct lwpQueue *, struct lwpProc *);
79 struct lwpProc *lwpGetFirst(struct lwpQueue *);
80 void lwpReady(struct lwpProc *);
81 void lwpReschedule(void);
82 void lwpEntryPoint(void);
83 void lwpInitSelect(struct lwpProc * self);
84 void lwpDestroy(struct lwpProc * proc);