/* $Header: /afs/sipb.mit.edu/project/afs/repository/src/lwp/lwp.h,v 1.2 1997/01/06 22:45:47 warlord Exp $ */ /* $Source: /afs/sipb.mit.edu/project/afs/repository/src/lwp/lwp.h,v $ */ #ifndef __LWP_INCLUDE_ #define __LWP_INCLUDE_ 1 #if !defined(lint) && !defined(LOCORE) && defined(RCS_HDRS) static char *rcsidlwp = "$Header: /afs/sipb.mit.edu/project/afs/repository/src/lwp/lwp.h,v 1.2 1997/01/06 22:45:47 warlord Exp $"; #endif /* **************************************************************************** * Copyright IBM Corporation 1988, 1989 - All Rights Reserved * * * * Permission to use, copy, modify, and distribute this software and its * * documentation for any purpose and without fee is hereby granted, * * provided that the above copyright notice appear in all copies and * * that both that copyright notice and this permission notice appear in * * supporting documentation, and that the name of IBM not be used in * * advertising or publicity pertaining to distribution of the software * * without specific, written prior permission. * * * * IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL * * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL IBM * * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY * * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER * * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * **************************************************************************** */ /*******************************************************************\ * * * Information Technology Center * * Carnegie-Mellon University * * * * * \*******************************************************************/ #include #define LWP_SUCCESS 0 #define LWP_EBADPID -1 #define LWP_EBLOCKED -2 #define LWP_EINIT -3 #define LWP_EMAXPROC -4 #define LWP_ENOBLOCK -5 #define LWP_ENOMEM -6 #define LWP_ENOPROCESS -7 #define LWP_ENOWAIT -8 #define LWP_EBADCOUNT -9 #define LWP_EBADEVENT -10 #define LWP_EBADPRI -11 #define LWP_NO_STACK -12 /* These two are for the signal mechanism. */ #define LWP_EBADSIG -13 /* bad signal number */ #define LWP_ESYSTEM -14 /* system call failed */ /* These are for the rock mechanism */ #define LWP_ENOROCKS -15 /* all rocks are in use */ #define LWP_EBADROCK -16 /* the specified rock does not exist */ /* Maximum priority permissible (minimum is always 0) */ #define LWP_MAX_PRIORITY 4 /* changed from 1 by Satya, 22 Nov. 85 */ /* Usual priority used by user LWPs */ #define LWP_NORMAL_PRIORITY (LWP_MAX_PRIORITY-2) /* Initial size of eventlist in a PCB; grows dynamically */ #define EVINITSIZE 5 typedef struct lwp_pcb *PROCESS; struct lwp_context { /* saved context for dispatcher */ char *topstack; /* ptr to top of process stack */ #ifdef sparc #ifdef save_allregs int globals[7+1+32+2+32+2]; /* g1-g7, y reg, f0-f31, fsr, fq, c0-c31, csr, cq. */ #else int globals[8]; /* g1-g7 and y registers. */ #endif #endif }; struct rock {/* to hide things associated with this LWP under */ int tag; /* unique identifier for this rock */ char *value; /* pointer to some arbitrary data structure */ }; #define MAXROCKS 4 /* max no. of rocks per LWP */ struct lwp_pcb { /* process control block */ char name[32]; /* ASCII name */ int rc; /* most recent return code */ char status; /* status flags */ char blockflag; /* if (blockflag), process blocked */ char eventlistsize; /* size of eventlist array */ char padding; /* force 32-bit alignment */ char **eventlist; /* ptr to array of eventids */ int eventcnt; /* no. of events currently in eventlist array*/ int wakevent; /* index of eventid causing wakeup */ int waitcnt; /* min number of events awaited */ int priority; /* dispatching priority */ struct lwp_pcb *misc; /* for LWP internal use only */ char *stack; /* ptr to process stack */ int stacksize; /* size of stack */ int stackcheck; /* first word of stack for overflow checking */ int (*ep)(); /* initial entry point */ char *parm; /* initial parm for process */ struct lwp_context context; /* saved context for next dispatch */ int rused; /* no of rocks presently in use */ struct rock rlist[MAXROCKS]; /* set of rocks to hide things under */ struct lwp_pcb *next, *prev; /* ptrs to next and previous pcb */ int level; /* nesting level of critical sections */ struct IoRequest *iomgrRequest; /* request we're waiting for */ int index; /* LWP index: should be small index; actually is incremented on each lwp_create_process */ }; extern int lwp_nextindex; /* Next lwp index to assign */ #ifndef LWP_KERNEL #define LWP_ActiveProcess (lwp_cpptr+0) #define LWP_Index() (LWP_ActiveProcess->index) #define LWP_HighestIndex() (lwp_nextindex - 1) #define LWP_SignalProcess(event) LWP_INTERNALSIGNAL(event, 1) #define LWP_NoYieldSignal(event) LWP_INTERNALSIGNAL(event, 0) extern #endif struct lwp_pcb *lwp_cpptr; /* pointer to current process pcb */ struct lwp_ctl { /* LWP control structure */ int processcnt; /* number of lightweight processes */ char *outersp; /* outermost stack pointer */ struct lwp_pcb *outerpid; /* process carved by Initialize */ struct lwp_pcb *first, last; /* ptrs to first and last pcbs */ #ifdef __hp9000s800 double dsptchstack[100]; /* stack for dispatcher use only */ /* force 8 byte alignment */ #else char dsptchstack[800]; /* stack for dispatcher use only */ #endif }; #ifndef LWP_KERNEL extern #endif char lwp_debug; /* ON = show LWP debugging trace */ /* * Under hpux, any stack size smaller than 16K seems prone to * overflow problems. */ #if defined(AFS_SUN5_ENV) || defined(AFS_LINUX_ENV) #define AFS_POSIX_SIGNALS #endif #if defined(AFS_HPUX_ENV) || defined(AFS_NEXT_ENV) || defined(AFS_AIX_ENV) || defined(AFS_OSF_ENV) #define AFS_LWP_MINSTACKSIZE (24 * 1024) #else #define AFS_LWP_MINSTACKSIZE (16 * 1024) #endif /* defined(AFS_HPUX_ENV) */ /* Action to take on stack overflow. */ #define LWP_SOQUIET 1 /* do nothing */ #define LWP_SOABORT 2 /* abort the program */ #define LWP_SOMESSAGE 3 /* print a message and be quiet */ extern int lwp_overflowAction; /* Tells if stack size counting is enabled. */ extern int lwp_stackUseEnabled; extern int lwp_MaxStackSeen; #ifndef AFS_AIX32_ENV #define LWP_CreateProcess2(a, b, c, d, e, f) LWP_CreateProcess((a), (b), (c), (d), (e), (f)) #endif #endif /* __LWP_INCLUDE_ */