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/*
* Copyright (C) 1998 NCSA
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Friday, March 27, 1998
*/
#ifndef _H5HGprivate_H
#define _H5HGprivate_H
#include <H5HGpublic.h>
/*
* Each collection has a magic number for some redundancy.
*/
#define H5HG_MAGIC "GCOL"
#define H5HG_SIZEOF_MAGIC 4
/*
* Global heap collection version.
*/
#define H5HG_VERSION 1
/*
* All global heap collections are at least this big. This allows us to read
* most collections with a single read() since we don't have to read a few
* bytes of header to figure out the size. If the heap is larger than this
* then a second read gets the rest after we've decoded the header.
*/
#define H5HG_MINSIZE 4096
/*
* Maximum length of the CWFS list, the list of remembered collections that
* have free space.
*/
#define H5HG_NCWFS 16
/*
* The maximum number of links allowed to a global heap object.
*/
#define H5HG_MAXLINK 65535
/*
* The size of the collection header.
*/
#define H5HG_SIZEOF_HDR(f) (4 + /*magic number */ \
1 + /*version number */ \
3 + /*reserved */ \
H5F_SIZEOF_SIZE(f)) /*collection size */
/*
* The overhead associated with each object in the heap.
*/
#define H5HG_SIZEOF_OBJHDR(f) (2 + /*reference count */ \
2 + /*reserved */ \
H5F_SIZEOF_SIZE(f)) /*object data size */
/*
* The initial guess for the number of messages in a collection. We assume
* that all objects in that collection are zero length, giving the maximum
* possible number of objects in the collection. The collection itself has
* some overhead and each message has some overhead.
*/
#define H5HG_NOBJS(f,z) (int)((((z)-H5HG_SIZEOF_HDR(f))/ \
H5HG_SIZEOF_OBJHDR(f)+1))
typedef struct H5HG_t H5HG_t;
herr_t H5HG_create (H5F_t *f, size_t size);
herr_t H5HG_insert (H5F_t *f, size_t size, void *obj, H5HG_t *hobj/*out*/);
void *H5HG_peek (H5F_t *f, H5HG_t *hobj);
void *H5HG_read (H5F_t *f, H5HG_t *hobj, void *object);
intn H5HG_link (H5F_t *f, H5HG_t *hobj, intn adjust);
herr_t H5HG_remove (H5F_t *f, H5HG_t *hobj);
herr_t H5HG_debug(H5F_t *f, const haddr_t *addr, FILE *stream, intn indent,
intn fwidth);
#endif
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