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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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