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886c1fae06
Many style/formatting edits. Bug fixes. Reverted some previous changes temporarily while reviewing new code. Merged Baker's "virtual device" in a simpler form. ODS2 will assign a sensible drive name when mounting /image (== /virtual). If a specific drive name is desired, mount /image drivename=filespec. Files can be quoted, or use set qualifier_style unix if slashes are a problem. Note that mount on the command line allows tab completion. Moved "statistics" command into show. Coded support for import/binary (fixed records, 512 bytes). Converted fgets to fgetline Added show devices for Unix (limited by standard APIs) Got rid of separate ODS2-Image build.
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/* Cache.h V2.1 Definitions for cache routines */
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/*
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This is part of ODS2 written by Paul Nankervis,
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email address: Paulnank@au1.ibm.com
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ODS2 is distributed freely for all members of the
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VMS community to use. However all derived works
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must maintain comments in their source to acknowledge
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the contibution of the original author.
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*/
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#ifndef _CACHE_H
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#define _CACHE_H
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#ifdef VAXC /* Stupid VAX C doesn't allow "signed" keyword */
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#define signed
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#else
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#define signed signed
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#endif
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struct CACHE {
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struct CACHE *nextlru; /* next object on least recently used list */
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struct CACHE *lastlru; /* last object on least recently used list */
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struct CACHE *left; /* left branch of binary tree */
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struct CACHE *right; /* right branch of binary tree */
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struct CACHE **parent; /* address of pointer to this object */
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void *(*objmanager) (struct CACHE * cacheobj,int flushonly);
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unsigned hashval; /* object hash value */
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short refcount; /* object reference count */
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signed char balance; /* object tree imbalance factor */
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signed char objtype; /* object type (for debugging) */
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#define OBJTYPE_DEV 1
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#define OBJTYPE_FCB 2
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#define OBJTYPE_WCB 3
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#define OBJTYPE_VIOC 7
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};
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void cache_show(void);
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int cache_refcount(struct CACHE *cacheobj);
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struct CACHE *cache_delete(struct CACHE *cacheobj);
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void cache_purge(void);
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void cache_flush(void);
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void cache_remove(struct CACHE *cacheobj);
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void cache_touch(struct CACHE * cacheobj);
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void cache_untouch(struct CACHE * cacheobj,int recycle);
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void *cache_find( void **root, unsigned hashval, void *keyval, unsigned *retsts,
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int (*compare_func) ( unsigned hashval, void *keyval,
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void *node ),
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void *(*create_func) ( unsigned hashval, void *keyval,
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unsigned *retsts ) );
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#endif /* #ifndef _CACHE_H */
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