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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5HFspace.c
* May 2 2006
* Quincey Koziol <koziol@ncsa.uiuc.edu>
*
* Purpose: Space allocation routines for fractal heaps.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5HF_PACKAGE /*suppress error about including H5HFpkg */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5HFpkg.h" /* Fractal heaps */
/****************/
/* Local Macros */
/****************/
#define H5HF_FSPACE_SHRINK 80 /* Percent of "normal" size to shrink serialized free space size */
#define H5HF_FSPACE_EXPAND 120 /* Percent of "normal" size to expand serialized free space size */
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5HF_space_start
*
* Purpose: "Start up" free space for heap - open existing free space
* structure if one exists, otherwise create a new free space
* structure
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* May 2 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id)
{
const H5FS_section_class_t *classes[] = { /* Free space section classes implemented for fractal heap */
H5FS_SECT_CLS_FHEAP_SINGLE,
H5FS_SECT_CLS_FHEAP_RANGE,
H5FS_SECT_CLS_FHEAP_INDIRECT};
unsigned u; /* Local index variable */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5HF_space_start)
/*
* Check arguments.
*/
HDassert(hdr);
/* Allocate space for the section classes for the free list management code to use */
hdr->nsect_classes = NELMTS(classes);
if(NULL == (hdr->sect_cls = H5FL_SEQ_MALLOC(H5FS_section_class_t, hdr->nsect_classes)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for free space section class array ")
/* Copy the section classes for this heap */
/* (Initialization calls will be performed by the free list code) */
for(u = 0; u < hdr->nsect_classes; u++) {
/* Make certain that section class type can be used as an array index into this array */
HDassert(u == classes[u]->type);
HDmemcpy(&hdr->sect_cls[u], classes[u], sizeof(H5FS_section_class_t));
} /* end for */
/* Check for creating free space info for the heap */
if(H5F_addr_defined(hdr->fs_addr)) {
/* Open an existing free space structure for the heap */
if(NULL == (hdr->fspace = H5FS_open(hdr->f, dxpl_id, hdr->fs_addr,
H5HF_free_section_free_cb, hdr->nsect_classes, hdr->sect_cls, hdr)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize free space info")
} /* end if */
else {
H5FS_create_t fs_create; /* Free space creation parameters */
/* Set the free space creation parameters */
fs_create.client = H5FS_CLIENT_FHEAP_ID;
fs_create.shrink_percent = H5HF_FSPACE_SHRINK;
fs_create.expand_percent = H5HF_FSPACE_EXPAND;
fs_create.max_sect_size = hdr->man_dtable.cparam.max_direct_size;
fs_create.max_sect_addr = hdr->man_dtable.cparam.max_index;
/* Create the free space structure for the heap */
if(NULL == (hdr->fspace = H5FS_create(hdr->f, dxpl_id, &hdr->fs_addr,
&fs_create, H5HF_free_section_free_cb,
hdr->nsect_classes, hdr->sect_cls, hdr)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize free space info")
} /* end else */
/* Free space for heap is now open */
hdr->fspace_open = TRUE;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_space_start() */
/*-------------------------------------------------------------------------
* Function: H5HF_space_find
*
* Purpose: Attempt to find space in a fractal heap
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* May 2 2006
*
*-------------------------------------------------------------------------
*/
htri_t
H5HF_space_find(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t request, H5HF_free_section_t **node)
{
htri_t node_found; /* Whether an existing free list node was found */
htri_t ret_value; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5HF_space_find)
/*
* Check arguments.
*/
HDassert(hdr);
HDassert(request);
HDassert(node);
/* Check if the free space for the heap has been initialized */
if(!hdr->fspace_open)
if(H5HF_space_start(hdr, dxpl_id) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize heap free space")
/* Search for free space in the heap */
if((node_found = H5FS_find(hdr->f, dxpl_id, hdr->fspace, request, (H5FS_section_info_t **)node)) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't locate free space in fractal heap")
/* Set return value */
ret_value = node_found;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_space_find() */
/*-------------------------------------------------------------------------
* Function: H5HF_space_add
*
* Purpose: Add a section to the free space for the heap
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* May 2 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF_space_add(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *node)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5HF_space_add)
/*
* Check arguments.
*/
HDassert(hdr);
HDassert(node);
HDassert(hdr->fspace_open);
HDassert(hdr->fspace);
/* Add to the free space for the heap */
if(H5FS_add(hdr->f, dxpl_id, hdr->fspace, (H5FS_section_info_t *)node) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "can't add section to heap free space")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_space_add() */
/*-------------------------------------------------------------------------
* Function: H5HF_space_close
*
* Purpose: Close the free space for the heap
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* May 2 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF_space_close(H5HF_hdr_t *hdr, hid_t dxpl_id)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5HF_space_close)
/*
* Check arguments.
*/
HDassert(hdr);
/* Check if the free space was ever opened */
if(hdr->fspace_open) {
/* Sanity check */
HDassert(hdr->fspace);
/* Close the free space for the heap */
if(H5FS_close(hdr->f, dxpl_id, hdr->fspace) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
hdr->fspace = NULL;
/* Release the memory for the free space section classes */
H5FL_SEQ_FREE(H5FS_section_class_t, hdr->sect_cls);
/* Free space is now closed */
hdr->fspace_open = FALSE;
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_space_close() */
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