Import of Empire 4.2.12

2003-08-23 12:23:04 +00:00 · 2003-08-23 12:23:04 +00:00 · d8b7fdfae1
commit d8b7fdfae1
817 changed files with 126589 additions and 0 deletions
--- a/src/lib/lwp/lwpint.h
+++ b/src/lib/lwp/lwpint.h
@ -0,0 +1,105 @@
+/*
+ * lwpint.h -- lwp internal structures
+ *
+ * Copyright (C) 1991-3 Stephen Crane.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * author: Stephen Crane, (jsc@doc.ic.ac.uk), Department of Computing,
+ * Imperial College of Science, Technology and Medicine, 180 Queen's
+ * Gate, London SW7 2BZ, England.
+ */
+#ifndef _LWPINT_H
+#define _LWPINT_H
+
+/* `liveness' counter: check signals every `n' visits to the scheduler */
+/* note: the lower this value, the more responsive the system but the */
+/* more inefficient the context switch time */
+#define LCOUNT	-1
+
+#ifdef hpux
+int	lwpSave _PROTO((jmp_buf));
+void	lwpRestore _PROTO((jmp_buf));
+#endif
+
+#if defined(MIPS) || defined(AIX32) || defined(ALPHA) || defined(__vax)
+int	lwpSave _PROTO((jmp_buf));
+void	lwpRestore _PROTO((jmp_buf));
+#elif defined(SUN4)
+#define	lwpSave(x)	_setjmp(x)
+#define lwpRestore(x)	_longjmp(x, 1)
+#elif defined (UCONTEXT)
+#define lwpSave(x)    getcontext(&(x))
+#define lwpRestore(x) setcontext(&(x))
+#else
+#ifdef hpc
+#define	lwpSave(x)	setjmp(x)
+#define lwpRestore(x)	longjmp(x, 1)
+#else
+#ifndef hpux
+#define	lwpSave(x)	setjmp(x)
+#define lwpRestore(x)	longjmp(x, 1)
+#endif /* hpux */
+#endif /* hpc */
+#endif
+
+#ifdef AIX32
+/* AIX needs 12 extra bytes above the stack; we add it here */
+#define	LWP_EXTRASTACK	3*sizeof(long)
+#else
+#define LWP_EXTRASTACK	0
+#endif
+
+#define LWP_REDZONE	1024	/* make this a multiple of 1024 */
+
+/* XXX Note that this assumes sizeof(long) == 4 */
+#define LWP_CHECKMARK	0x5a5a5a5aL
+
+#define SIGNALS	sigmask(SIGALRM)
+
+#ifndef hpux
+typedef double stkalign_t;
+#else
+typedef struct {
+    char x[64];
+} stkalign_t;
+#endif
+
+/* internal routines */
+void		lwpAddTail _PROTO((struct lwpQueue *, struct lwpProc *));
+struct lwpProc	*lwpGetFirst _PROTO((struct lwpQueue *));
+void		lwpReschedule _PROTO((void));
+void		lwpReady _PROTO((struct lwpProc *));
+void		lwpOnalarm _PROTO((void));
+
+#ifdef UCONTEXT
+void          lwpInitContext _PROTO((struct lwpProc *, stack_t *));
+#else /* GETCONTEXT */
+#ifdef hpc
+void          lwpInitContext _PROTO((struct lwpProc *, void *));
+#else
+#ifdef hpux
+void          lwpInitContext _PROTO((volatile struct lwpProc *volatile, void *));
+#else
+void          lwpInitContext _PROTO((struct lwpProc *, void *));
+#endif /* hpux */
+#endif /* hpc */
+#endif /* GETCONTEXT */
+void		lwpEntryPoint _PROTO((void));
+void		lwpInitSelect _PROTO((struct lwpProc *self));
+void		lwpDestroy _PROTO((struct lwpProc *proc));
+
+#endif	/* _LWP_H */
+