mirror of
https://github.com/HDFGroup/hdf5.git
synced 2026-10-08 23:44:08 +03:00
Quincey Koziol
48205a43fe
New feature & code cleanup
Description:
Add feature to find first block >= a certain size (useful for allocating
space)
Cleaned up various comments, etc.
Platforms tested:
FreeBSD 4.11 (sleipnir)
Solaris 2.9 (shanti)
332 lines
9.5 KiB
C
332 lines
9.5 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*-------------------------------------------------------------------------
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*
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* Created: H5BTcache.c
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* Mar 10 2005
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* Quincey Koziol <koziol@ncsa.uiuc.edu>
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*
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* Purpose: Implement block tracker metadata cache methods.
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*
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*-------------------------------------------------------------------------
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*/
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#define H5BT_PACKAGE /*suppress error about including H5SHpkg */
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/* Private headers */
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#include "H5private.h" /* Generic Functions */
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#include "H5BTpkg.h" /* Block tracker */
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#include "H5Eprivate.h" /* Error handling */
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/* Local macros */
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/* Block tracker format version #'s */
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#define H5BT_VERSION 0
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/* Local typedefs */
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/* Local prototypes */
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/* Metadata cache callbacks */
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static H5BT_t *H5BT_cache_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_type, void *udata);
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static herr_t H5BT_cache_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5BT_t *b);
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static herr_t H5BT_cache_clear(H5F_t *f, H5BT_t *b, hbool_t destroy);
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static herr_t H5BT_cache_size(const H5F_t *f, const H5BT_t *bt, size_t *size_ptr);
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/* Package variables */
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/* H5BT inherits cache-like properties from H5AC */
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const H5AC_class_t H5AC_BLTR[1] = {{
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H5AC_BLTR_ID,
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(H5AC_load_func_t)H5BT_cache_load,
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(H5AC_flush_func_t)H5BT_cache_flush,
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(H5AC_dest_func_t)H5BT_cache_dest,
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(H5AC_clear_func_t)H5BT_cache_clear,
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(H5AC_size_func_t)H5BT_cache_size,
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}};
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/* Static variables */
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/* Declare a free list to manage block tracker data to/from disk */
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H5FL_BLK_DEFINE_STATIC(info_block);
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/*-------------------------------------------------------------------------
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* Function: H5BT_cache_load
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*
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* Purpose: Loads block tracker info from the disk.
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*
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* Return: Success: Pointer to a new block tracker
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*
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* Failure: NULL
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*
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* Programmer: Quincey Koziol
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* koziol@ncsa.uiuc.edu
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* Mar 10 2005
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*
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*-------------------------------------------------------------------------
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*/
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static H5BT_t *
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H5BT_cache_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void UNUSED *udata1, void UNUSED *udata2)
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{
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H5BT_t *bt = NULL;
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size_t size;
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uint8_t *buf = NULL;
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uint8_t *p; /* Pointer into raw data buffer */
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H5BT_t *ret_value;
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FUNC_ENTER_NOAPI(H5BT_cache_load, NULL)
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/* Check arguments */
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HDassert(f);
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HDassert(H5F_addr_defined(addr));
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if (NULL==(bt = H5FL_MALLOC(H5BT_t)))
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HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
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HDmemset(&bt->cache_info,0,sizeof(H5AC_info_t));
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/* Compute the size of the block tracker on disk */
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size = H5BT_SIZE(f);
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/* Allocate temporary buffer */
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if ((buf=H5FL_BLK_MALLOC(info_block,size))==NULL)
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HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
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/* Read header from disk */
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if (H5F_block_read(f, H5FD_MEM_BLKTRK, addr, size, dxpl_id, buf)<0)
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HGOTO_ERROR(H5E_BLKTRK, H5E_READERROR, NULL, "can't read block tracker info")
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p = buf;
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/* magic number */
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if (HDmemcmp(p, H5BT_MAGIC, H5BT_SIZEOF_MAGIC))
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HGOTO_ERROR(H5E_BLKTRK, H5E_CANTLOAD, NULL, "wrong block tracker info signature")
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p += H5BT_SIZEOF_MAGIC;
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/* version */
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if (*p++ != H5BT_VERSION)
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HGOTO_ERROR(H5E_BLKTRK, H5E_CANTLOAD, NULL, "wrong block tracker info version")
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/* Size status information */
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bt->status = *p++;
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/* Max. block size info */
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H5F_DECODE_LENGTH(f, p, bt->max_block_size);
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UINT32DECODE(p, bt->max_block_cnt);
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/* Min. block size info */
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H5F_DECODE_LENGTH(f, p, bt->min_block_size);
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UINT32DECODE(p, bt->min_block_cnt);
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/* Total size of all blocks tracked */
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H5F_DECODE_LENGTH(f, p, bt->tot_block_size);
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/* Address of B-tree for blocks */
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H5F_addr_decode(f, (const uint8_t **)&p, &(bt->bt2_addr));
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/* Set return value */
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ret_value = bt;
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done:
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if(buf)
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H5FL_BLK_FREE(info_block,buf);
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if (!ret_value && bt)
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(void)H5BT_cache_dest(f,bt);
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5BT_cache_load() */
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/*-------------------------------------------------------------------------
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* Function: H5BT_cache_flush
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*
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* Purpose: Flushes dirty block tracker info to disk.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* koziol@ncsa.uiuc.edu
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* Mar 10 2005
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*
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*-------------------------------------------------------------------------
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*/
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static herr_t
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H5BT_cache_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5BT_t *bt)
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{
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herr_t ret_value = SUCCEED; /* Return value */
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FUNC_ENTER_NOAPI(H5BT_cache_flush, FAIL)
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/* check arguments */
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HDassert(f);
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HDassert(H5F_addr_defined(addr));
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HDassert(bt);
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if (bt->cache_info.is_dirty) {
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uint8_t *buf = NULL;
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uint8_t *p; /* Pointer into raw data buffer */
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size_t size;
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/* Compute the size of the block tracker info on disk */
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size = H5BT_SIZE(f);
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/* Allocate temporary buffer */
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if ((buf=H5FL_BLK_MALLOC(info_block,size))==NULL)
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HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed");
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p = buf;
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/* magic number */
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HDmemcpy(p, H5BT_MAGIC, H5BT_SIZEOF_MAGIC);
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p += H5BT_SIZEOF_MAGIC;
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/* version # */
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*p++ = H5BT_VERSION;
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/* Size status information */
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*p++ = bt->status;
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/* Max. block size info */
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H5F_ENCODE_LENGTH(f, p, bt->max_block_size);
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UINT32ENCODE(p, bt->max_block_cnt);
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/* Min. block size info */
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H5F_ENCODE_LENGTH(f, p, bt->min_block_size);
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UINT32ENCODE(p, bt->min_block_cnt);
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/* Total size of all blocks tracked */
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H5F_ENCODE_LENGTH(f, p, bt->tot_block_size);
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/* Address of B-tree for blocks */
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H5F_addr_encode(f, &p, bt->bt2_addr);
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/* Write the block tracker info. */
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if (H5F_block_write(f, H5FD_MEM_BLKTRK, addr, size, dxpl_id, buf) < 0)
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HGOTO_ERROR(H5E_BLKTRK, H5E_CANTFLUSH, FAIL, "unable to save block tracker info to disk")
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H5FL_BLK_FREE(info_block,buf);
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bt->cache_info.is_dirty = FALSE;
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} /* end if */
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if (destroy)
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if (H5BT_cache_dest(f,bt) < 0)
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HGOTO_ERROR(H5E_BLKTRK, H5E_CANTFREE, FAIL, "unable to destroy block tracker info")
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* H5BT_cache_flush() */
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/*-------------------------------------------------------------------------
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* Function: H5BT_cache_dest
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*
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* Purpose: Destroys a block tracker in memory.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* koziol@ncsa.uiuc.edu
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* Mar 10 2005
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*
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*-------------------------------------------------------------------------
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*/
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/* ARGSUSED */
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herr_t
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H5BT_cache_dest(H5F_t UNUSED *f, H5BT_t *bt)
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{
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FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5BT_cache_dest)
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/*
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* Check arguments.
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*/
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HDassert(bt);
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/* Free block tracker info */
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H5FL_FREE(H5BT_t,bt);
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FUNC_LEAVE_NOAPI(SUCCEED)
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} /* end H5BT_cache_dest() */
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/*-------------------------------------------------------------------------
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* Function: H5BT_cache_clear
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*
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* Purpose: Mark a block tracker info in memory as non-dirty.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* koziol@ncsa.uiuc.edu
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* Mar 10 2005
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*
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*-------------------------------------------------------------------------
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*/
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static herr_t
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H5BT_cache_clear(H5F_t *f, H5BT_t *bt, hbool_t destroy)
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{
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herr_t ret_value = SUCCEED;
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FUNC_ENTER_NOAPI_NOINIT(H5BT_cache_clear)
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/*
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* Check arguments.
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*/
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HDassert(bt);
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/* Reset the dirty flag. */
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bt->cache_info.is_dirty = FALSE;
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if (destroy)
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if (H5BT_cache_dest(f, bt) < 0)
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HGOTO_ERROR(H5E_BLKTRK, H5E_CANTFREE, FAIL, "unable to destroy block tracker info")
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5BT_cache_clear() */
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/*-------------------------------------------------------------------------
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* Function: H5BT_cache_size
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*
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* Purpose: Compute the size in bytes of a block tracker info
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* on disk, and return it in *size_ptr. On failure,
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* the value of *size_ptr is undefined.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* koziol@ncsa.uiuc.edu
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* Mar 10 2005
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*
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*-------------------------------------------------------------------------
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*/
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static herr_t
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H5BT_cache_size(const H5F_t *f, const H5BT_t UNUSED *bt, size_t *size_ptr)
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{
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FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5BT_cache_size)
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/* check arguments */
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HDassert(f);
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HDassert(size_ptr);
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/* Set size value */
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*size_ptr = H5BT_SIZE(f);
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FUNC_LEAVE_NOAPI(SUCCEED)
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} /* H5BT_cache_size() */
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