104 lines
3 KiB
C
104 lines
3 KiB
C
/*
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* lwpint.h -- lwp internal structures
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*
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* Copyright (C) 1991-3 Stephen Crane.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* author: Stephen Crane, (jsc@doc.ic.ac.uk), Department of Computing,
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* Imperial College of Science, Technology and Medicine, 180 Queen's
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* Gate, London SW7 2BZ, England.
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*/
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#ifndef _LWPINT_H
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#define _LWPINT_H
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/* `liveness' counter: check signals every `n' visits to the scheduler */
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/* note: the lower this value, the more responsive the system but the */
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/* more inefficient the context switch time */
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#define LCOUNT -1
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#ifdef hpux
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int lwpSave _PROTO((jmp_buf));
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void lwpRestore _PROTO((jmp_buf));
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#endif
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#if defined(MIPS) || defined(AIX32) || defined(ALPHA) || defined(__vax)
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int lwpSave _PROTO((jmp_buf));
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void lwpRestore _PROTO((jmp_buf));
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#elif defined(SUN4)
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#define lwpSave(x) _setjmp(x)
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#define lwpRestore(x) _longjmp(x, 1)
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#elif defined (UCONTEXT)
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#define lwpSave(x) getcontext(&(x))
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#define lwpRestore(x) setcontext(&(x))
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#else
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#ifdef hpc
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#define lwpSave(x) setjmp(x)
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#define lwpRestore(x) longjmp(x, 1)
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#else
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#ifndef hpux
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#define lwpSave(x) setjmp(x)
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#define lwpRestore(x) longjmp(x, 1)
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#endif /* hpux */
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#endif /* hpc */
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#endif
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#ifdef AIX32
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/* AIX needs 12 extra bytes above the stack; we add it here */
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#define LWP_EXTRASTACK 3*sizeof(long)
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#else
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#define LWP_EXTRASTACK 0
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#endif
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#define LWP_REDZONE 1024 /* make this a multiple of 1024 */
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/* XXX Note that this assumes sizeof(long) == 4 */
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#define LWP_CHECKMARK 0x5a5a5a5aL
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#define SIGNALS sigmask(SIGALRM)
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#ifndef hpux
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typedef double stkalign_t;
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#else
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typedef struct {
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char x[64];
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} stkalign_t;
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#endif
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/* internal routines */
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void lwpAddTail _PROTO((struct lwpQueue *, struct lwpProc *));
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struct lwpProc *lwpGetFirst _PROTO((struct lwpQueue *));
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void lwpReschedule _PROTO((void));
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void lwpReady _PROTO((struct lwpProc *));
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void lwpOnalarm _PROTO((void));
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#ifdef UCONTEXT
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void lwpInitContext _PROTO((struct lwpProc *, stack_t *));
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#else /* GETCONTEXT */
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#ifdef hpc
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void lwpInitContext _PROTO((struct lwpProc *, void *));
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#else
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#ifdef hpux
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void lwpInitContext _PROTO((volatile struct lwpProc * volatile, void *));
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#else
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void lwpInitContext _PROTO((struct lwpProc *, void *));
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#endif /* hpux */
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#endif /* hpc */
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#endif /* GETCONTEXT */
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void lwpEntryPoint _PROTO((void));
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void lwpInitSelect _PROTO((struct lwpProc * self));
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void lwpDestroy _PROTO((struct lwpProc * proc));
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#endif /* _LWP_H */
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