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/* Copyright (c) 1992 The Geometry Center; University of Minnesota
1300 South Second Street; Minneapolis, MN 55454, USA;
This file is part of geomview/OOGL. geomview/OOGL is free software;
you can redistribute it and/or modify it only under the terms given in
the file COPYING, which you should have received along with this file.
This and other related software may be obtained via anonymous ftp from
geom.umn.edu; email: software@geom.umn.edu. */
/* Authors: Charlie Gunn, Stuart Levy, Tamara Munzner, Mark Phillips */
#ifndef _HANDLEPOOLP_
#define _HANDLEPOOLP_
/*
* Communications -- Private definitions for Pools and Handles.
*/
#include "ooglutil.h"
#include "streampool.h"
/*#include "sm.h"*/
#define HANDLEMAGIC OOGLMagic('h',1)
typedef struct HRef {
Handle **hp;
Ref *parentobj;
void *info;
void (*update) P((Handle **, Ref *, void *));
} HRef;
struct Handle {
REFERENCEFIELDS
HandleOps *ops; /* Comm-related operations on our datatype */
char *name; /* Char-string name */
Ref *object; /* Current object value if any */
Handle *next; /* Link in list of all handles */
Pool *whence; /* Where did this handle's value come from? */
int maxrefs; /* Resizable array of references */
int nrefs; /* to this Handle, which we update */
HRef *refs; /* when the Handle's object changes. */
int permanent; /* Retain even when last reference goes away? */
/*
* Pool-type-specific state
*/
#if 0
SMSym *sym; /* Address of our SM symbol */
int version; /* Version number of shared-memory symbol */
Pool *smpool; /* Pool in which our symbol lies */
Handle *samepool; /* Link in list of handles on this pool */
#endif
};
#define P_SM 1
#define P_STREAM 2
struct Pool {
int type; /* P_SM or P_STREAM */
Pool *next; /* Link in list of all Pools */
char *poolname; /* Name of this pool: typically a filename */
Handle *handles; /* All handles using this Pool */
HandleOps *ops; /* I/O operations */
long await; /* Unix time until which we should wait */
int (*resyncing)(); /* We're resyncing, call this ... if non-NULL */
/*
* State for P_STREAM pools.
*/
char otype; /* PO_HANDLES, PO_DATA, PO_ALL */
char mode; /* read/write status: 0, 1, 2 as with open() */
char seekable; /* 1 for plain file, 0 for pipe/socket */
char softEOF; /* Can we hope to read more after EOF?
* 1 for tty or named pipe, 0 otherwise.
*/
FILE *inf;
FILE *outf;
short flags; /* Miscellaneous internal flags: */
#define PF_TEMP 1 /* "Temporary pool" -- not in AllPools list */
#define PF_ANY 2 /* any objects read from this Pool? */
#define PF_REREAD 4 /* actually re-read on "<" */
#define PF_CLOSING 0x10 /* Internal flag to avoid PoolClose() recursion */
#define PF_ASLEEP 0x20 /* PoolSleep() called on this Pool. */
#define PF_DELETED 0x40 /* Pool is on free list - don't touch! */
#define PF_NOPREFETCH 0x80 /* Don't let PoolIn() prefetch the first char */
short level; /* {} Bracket counter */
long inf_mtime; /* modification time of p->inf file */
/* A second explicit reference to the same
* file can cause it to be re-read if it's
* been changed since last time, or if it's
* a stream (not seekable).
*/
struct timeval awaken; /* Resume reading at this time */
struct timeval timebase; /* Basis for our clock */
/*
* State for P_SM pools.
*/
#if 0
SMRegion *sm; /* for shared-memory Pools */
#endif
/*
* client data pointer, used by clients for whatever they want
*/
void *client_data;
};
#endif /*_HANDLEPOOLP_*/
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.