[svn-r12258] Purpose:

    Code checkpoint

Description:
    Add in more fractal heap support for odd allocation patterns (entries that
are too large for various block sizes, etc.)

    Broke out fractal heap code into more source code modules.

    Refactored fractal heap test to make it more understandable and
maintainable for the long term.

Platforms tested:
    FreeBSD 4.11 (sleipnir)
    Linux 2.4 (heping)
    Linux 2.4/64 (mir)
    Solaris 2.9 (shanti)

1 files changed, 213 insertions, 0 deletions

diff --git a/src/H5HFdtable.c b/src/H5HFdtable.c
new file mode 100644
index 0000000..e571b85
--- /dev/null
+++ b/src/H5HFdtable.c
@@ -0,0 +1,213 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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:		H5HFdtable.c
+ *			Apr 10 2006
+ *			Quincey Koziol <koziol@ncsa.uiuc.edu>
+ *
+ * Purpose:		"Doubling table" 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			*/
+#include "H5MMprivate.h"	/* Memory management			*/
+#include "H5Vprivate.h"		/* Vectors and arrays 			*/
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5HF_dtable_init
+ *
+ * Purpose:	Initialize values for doubling table
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar  6 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF_dtable_init(H5HF_dtable_t *dtable)
+{
+    hsize_t tmp_block_size;             /* Temporary block size */
+    hsize_t acc_block_off;              /* Accumulated block offset */
+    size_t u;                           /* Local index variable */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT(H5HF_dtable_init)
+
+    /*
+     * Check arguments.
+     */
+    HDassert(dtable);
+
+    /* Compute/cache some values */
+    dtable->first_row_bits = H5V_log2_of2(dtable->cparam.start_block_size) +
+            H5V_log2_of2(dtable->cparam.width);
+    dtable->max_root_rows = (dtable->cparam.max_index - dtable->first_row_bits) + 1;
+    dtable->max_direct_rows = (H5V_log2_of2(dtable->cparam.max_direct_size) -
+            H5V_log2_of2(dtable->cparam.start_block_size)) + 2;
+    dtable->num_id_first_row = dtable->cparam.start_block_size * dtable->cparam.width;
+    dtable->max_dir_blk_off_size = H5HF_SIZEOF_OFFSET_LEN(dtable->cparam.max_direct_size);
+
+    /* Build table of block sizes for each row */
+    if(NULL == (dtable->row_block_size = H5MM_malloc(dtable->max_root_rows * sizeof(hsize_t))))
+	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create doubling table block size table")
+    if(NULL == (dtable->row_block_off = H5MM_malloc(dtable->max_root_rows * sizeof(hsize_t))))
+	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create doubling table block offset table")
+    if(NULL == (dtable->row_dblock_free = H5MM_malloc(dtable->max_root_rows * sizeof(hsize_t))))
+	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create doubling table direct block free space table")
+    tmp_block_size = dtable->cparam.start_block_size;
+    acc_block_off = dtable->cparam.start_block_size * dtable->cparam.width;
+    dtable->row_block_size[0] = dtable->cparam.start_block_size;
+    dtable->row_block_off[0] = 0;
+    for(u = 1; u < dtable->max_root_rows; u++) {
+        dtable->row_block_size[u] = tmp_block_size;
+        dtable->row_block_off[u] = acc_block_off;
+        tmp_block_size *= 2;
+        acc_block_off *= 2;
+    } /* end for */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF_dtable_init() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5HF_dtable_lookup
+ *
+ * Purpose:	Compute the row & col of an offset in a doubling-table
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar  6 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF_dtable_lookup(const H5HF_dtable_t *dtable, hsize_t off, unsigned *row, unsigned *col)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5HF_dtable_lookup)
+
+    /*
+     * Check arguments.
+     */
+    HDassert(dtable);
+    HDassert(row);
+    HDassert(col);
+
+    /* Check for offset in first row */
+    if(off < dtable->num_id_first_row) {
+        *row = 0;
+        *col = off / dtable->cparam.start_block_size;
+    } /* end if */
+    else {
+        unsigned high_bit = H5V_log2_gen(off);  /* Determine the high bit in the offset */
+        hsize_t off_mask = 1 << high_bit;       /* Compute mask for determining column */
+
+        *row = (high_bit - dtable->first_row_bits) + 1;
+        *col = (off - off_mask) / dtable->row_block_size[*row];
+    } /* end else */
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5HF_dtable_lookup() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5HF_dtable_dest
+ *
+ * Purpose:	Release information for doubling table
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar 27 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF_dtable_dest(H5HF_dtable_t *dtable)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5HF_dtable_dest)
+
+    /*
+     * Check arguments.
+     */
+    HDassert(dtable);
+
+    /* Free the block size lookup table for the doubling table */
+    H5MM_xfree(dtable->row_block_size);
+
+    /* Free the block offset lookup table for the doubling table */
+    H5MM_xfree(dtable->row_block_off);
+
+    /* Free the direct block free space lookup table for the doubling table */
+    H5MM_xfree(dtable->row_dblock_free);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5HF_dtable_dest() */
+