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Diffstat (limited to 'src/H5HFdblock.c')
-rw-r--r-- | src/H5HFdblock.c | 730 |
1 files changed, 730 insertions, 0 deletions
diff --git a/src/H5HFdblock.c b/src/H5HFdblock.c new file mode 100644 index 0000000..4496962 --- /dev/null +++ b/src/H5HFdblock.c @@ -0,0 +1,730 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by The HDF Group. * + * 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 COPYING file, which can be found at the root of the source code * + * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * + * If you do not have access to either file, you may request a copy from * + * help@hdfgroup.org. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/*------------------------------------------------------------------------- + * + * Created: H5HFdblock.c + * Apr 10 2006 + * Quincey Koziol <koziol@ncsa.uiuc.edu> + * + * Purpose: Direct block routines for fractal heaps. + * + *------------------------------------------------------------------------- + */ + +/****************/ +/* Module Setup */ +/****************/ + +#include "H5HFmodule.h" /* This source code file is part of the H5HF module */ + + +/***********/ +/* Headers */ +/***********/ +#include "H5private.h" /* Generic Functions */ +#include "H5Eprivate.h" /* Error handling */ +#include "H5Fprivate.h" /* File access */ +#include "H5HFpkg.h" /* Fractal heaps */ +#include "H5MFprivate.h" /* File memory management */ +#include "H5VMprivate.h" /* Vectors and arrays */ + +/****************/ +/* Local Macros */ +/****************/ + + +/******************/ +/* Local Typedefs */ +/******************/ + + +/********************/ +/* Package Typedefs */ +/********************/ + + +/********************/ +/* Local Prototypes */ +/********************/ + + +/*********************/ +/* Package Variables */ +/*********************/ + +/* Declare a free list to manage the H5HF_direct_t struct */ +H5FL_DEFINE(H5HF_direct_t); + + +/*****************************/ +/* Library Private Variables */ +/*****************************/ + + +/*******************/ +/* Local Variables */ +/*******************/ + + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_create + * + * Purpose: Allocate & initialize a managed direct block + * + * Return: Pointer to new direct block on success, NULL on failure + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * Feb 27 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblock, + unsigned par_entry, haddr_t *addr_p, H5HF_free_section_t **ret_sec_node) +{ + H5HF_free_section_t *sec_node; /* Pointer to free space section for block */ + H5HF_direct_t *dblock = NULL; /* Pointer to direct block */ + haddr_t dblock_addr; /* Direct block's address */ + size_t free_space; /* Free space in new block */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(hdr); + + /* + * Allocate file and memory data structures. + */ + if(NULL == (dblock = H5FL_MALLOC(H5HF_direct_t))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for fractal heap direct block") + + /* Reset the metadata cache info for the heap header */ + HDmemset(&dblock->cache_info, 0, sizeof(H5AC_info_t)); + + /* Share common heap information */ + dblock->hdr = hdr; + if(H5HF_hdr_incr(hdr) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment reference count on shared heap header") + + /* Set info for direct block */ + if(par_iblock) { + unsigned par_row = par_entry / hdr->man_dtable.cparam.width; /* Row for block */ + + /* Compute offset & size, based on parent's information */ + dblock->block_off = par_iblock->block_off; + dblock->block_off += hdr->man_dtable.row_block_off[par_row]; + dblock->block_off += hdr->man_dtable.row_block_size[par_row] * (par_entry % hdr->man_dtable.cparam.width); + H5_CHECKED_ASSIGN(dblock->size, size_t, hdr->man_dtable.row_block_size[par_row], hsize_t); + } /* end if */ + else { + /* Must be the root direct block */ + dblock->block_off = 0; + dblock->size = hdr->man_dtable.cparam.start_block_size; + } /* end else */ + dblock->file_size = 0; + free_space = dblock->size - H5HF_MAN_ABS_DIRECT_OVERHEAD(hdr); + + /* Allocate buffer for block */ +/* XXX: Change to using free-list factories */ + if((dblock->blk = H5FL_BLK_MALLOC(direct_block, dblock->size)) == NULL) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") + HDmemset(dblock->blk, 0, dblock->size); + + dblock->write_buf = NULL; + dblock->write_size = 0; + + /* Allocate [temporary] space for the direct block on disk */ + if(H5F_USE_TMP_SPACE(hdr->f)) { + if(HADDR_UNDEF == (dblock_addr = H5MF_alloc_tmp(hdr->f, (hsize_t)dblock->size))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block") + } /* end if */ + else { + if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, (hsize_t)dblock->size))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block") + } /* end else */ + + /* Attach to parent indirect block, if there is one */ + dblock->parent = par_iblock; + dblock->fd_parent = par_iblock; + if(dblock->parent) + if(H5HF_man_iblock_attach(dblock->parent, par_entry, dblock_addr) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't attach direct block to parent indirect block") + dblock->par_entry = par_entry; + + /* Create a new 'single' section for the free space in the block */ + if(NULL == (sec_node = H5HF_sect_single_new((dblock->block_off + H5HF_MAN_ABS_DIRECT_OVERHEAD(hdr)), + free_space, dblock->parent, dblock->par_entry))) + HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't create section for new direct block's free space") + + /* Check what to do with section node */ + if(ret_sec_node) + /* Pass back the pointer to the section instead of adding it to the free list */ + *ret_sec_node = sec_node; + else { + /* Add new free space to the heap's list of space */ + if(H5HF_space_add(hdr, dxpl_id, sec_node, 0) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add direct block free space to global list") + } /* end else */ + + /* Cache the new fractal heap direct block */ + if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add fractal heap direct block to cache") + + /* Increase the allocated heap size */ + if(H5HF_hdr_inc_alloc(hdr, dblock->size) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't increase allocated heap size") + + /* Set the address of of direct block, if requested */ + if(addr_p) + *addr_p = dblock_addr; + +done: + if(ret_value < 0) + if(dblock) + if(H5HF_man_dblock_dest(dblock) < 0) + HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap direct block") + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_create() */ + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_destroy + * + * Purpose: Destroy a managed direct block + * + * Note: This routine does _not_ insert a range section for the + * destroyed direct block, that must be handled by the + * caller. + * + * Return: SUCCEED/FAIL + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * May 17 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_direct_t *dblock, + haddr_t dblock_addr) +{ + hsize_t dblock_size; /* Size of direct block on disk */ + unsigned cache_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting indirect block */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(hdr); + HDassert(dblock); + + /* Check for I/O filters on this heap */ + if(hdr->filter_len > 0) { + /* Check for root direct block */ + if(dblock->parent == NULL) + /* Get direct block's actual size */ + dblock_size = (hsize_t)hdr->pline_root_direct_size; + else { + H5HF_indirect_t *par_iblock; /* Parent indirect block */ + unsigned par_entry; /* Entry in parent indirect block */ + + /* Get parent information */ + par_iblock = dblock->parent; + par_entry = dblock->par_entry; + + /* Get direct block's actual size */ + dblock_size = (hsize_t)par_iblock->filt_ents[par_entry].size; + } /* end else */ + } /* end if */ + else + dblock_size = (hsize_t)dblock->size; + + /* Check for root direct block */ + if(hdr->man_dtable.curr_root_rows == 0) { + /* Sanity check */ + HDassert(hdr->man_dtable.table_addr == dblock_addr); + HDassert(hdr->man_dtable.cparam.start_block_size == dblock->size); + + /* Sanity check block iterator */ + HDassert(!H5HF_man_iter_ready(&hdr->next_block)); + + /* Reset root pointer information */ + hdr->man_dtable.table_addr = HADDR_UNDEF; + + /* Reset header information back to "empty heap" state */ + if(H5HF_hdr_empty(hdr) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't make heap empty") + } /* end if */ + else { + /* Adjust heap statistics */ + hdr->man_alloc_size -= dblock->size; + + /* Check for this direct block being the highest in the heap */ + if((dblock->block_off + dblock->size) == hdr->man_iter_off) { + /* Move 'next block' iterator backwards (may shrink heap) */ + if(H5HF_hdr_reverse_iter(hdr, dxpl_id, dblock_addr) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't reverse 'next block' iterator") + } /* end if */ +#if 0 + else { + unsigned par_row, par_col; /* Row & column in parent indirect block */ + + /* Compute row & column in parent indirect block */ + par_row = dblock->par_entry / hdr->man_dtable.cparam.width; + par_col = dblock->par_entry % hdr->man_dtable.cparam.width; + + /* Add a 'range' section for the space in the destroyed block */ + if(H5HF_sect_range_add(hdr, dxpl_id, dblock->block_off, hdr->man_dtable.row_tot_dblock_free[par_row], + dblock->parent, par_row, par_col, 1) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "can't create range section for direct block being destroyed") + } /* end else */ +#endif /* 0 */ + + /* Detach from parent indirect block */ + if(dblock->parent) { + if(H5HF_man_iblock_detach(dblock->parent, dxpl_id, dblock->par_entry) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't detach from parent indirect block"); + dblock->parent = NULL; + dblock->par_entry = 0; + } /* end if */ + } /* end else */ + + /* Indicate that the indirect block should be deleted */ + dblock->file_size = dblock_size; + cache_flags |= H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG; + + /* If the dblock is in real file space, also tell the cache to free its file space */ + if (!H5F_IS_TMP_ADDR(hdr->f, dblock_addr)) + cache_flags |= H5AC__FREE_FILE_SPACE_FLAG; + +done: + /* Unprotect the indirect block, with appropriate flags */ + if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, cache_flags) < 0) + HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block") + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_destroy() */ + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_new + * + * Purpose: Create a direct block large enough to hold an object of + * the requested size + * + * Return: SUCCEED/FAIL + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * Mar 13 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5HF_man_dblock_new(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t request, + H5HF_free_section_t **ret_sec_node) +{ + haddr_t dblock_addr; /* Address of new direct block */ + size_t min_dblock_size; /* Min. size of direct block to allocate */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(hdr); + HDassert(request > 0); + + /* Compute the min. size of the direct block needed to fulfill the request */ + if(request < hdr->man_dtable.cparam.start_block_size) + min_dblock_size = hdr->man_dtable.cparam.start_block_size; + else { + min_dblock_size = ((size_t)1) << (1 + H5VM_log2_gen((uint64_t)request)); + HDassert(min_dblock_size <= hdr->man_dtable.cparam.max_direct_size); + } /* end else */ + + /* Adjust the size of block needed to fulfill request, with overhead */ + if(min_dblock_size < H5HF_MAN_ABS_DIRECT_OVERHEAD(hdr) + request) + min_dblock_size *= 2; + + /* Check if this is the first block in the heap */ + if(!H5F_addr_defined(hdr->man_dtable.table_addr) && + min_dblock_size == hdr->man_dtable.cparam.start_block_size) { + /* Create new direct block at starting offset */ + if(H5HF_man_dblock_create(dxpl_id, hdr, NULL, 0, &dblock_addr, ret_sec_node) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block") + + /* Point root at new direct block */ + hdr->man_dtable.curr_root_rows = 0; + hdr->man_dtable.table_addr = dblock_addr; + if(hdr->filter_len > 0) { + hdr->pline_root_direct_size = hdr->man_dtable.cparam.start_block_size; + hdr->pline_root_direct_filter_mask = 0; + } /* end if */ + + /* Extend heap to cover new direct block */ + if(H5HF_hdr_adjust_heap(hdr, (hsize_t)hdr->man_dtable.cparam.start_block_size, (hssize_t)hdr->man_dtable.row_tot_dblock_free[0]) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTEXTEND, FAIL, "can't increase space to cover root direct block") + } /* end if */ + /* Root entry already exists, allocate direct block from root indirect block */ + else { + H5HF_indirect_t *iblock; /* Pointer to indirect block to create */ + unsigned next_row; /* Iterator's next block row */ + unsigned next_entry; /* Iterator's next block entry */ + size_t next_size; /* Size of next direct block to create */ + + /* Update iterator to reflect any previous increments as well as allow for requested direct block size */ + if(H5HF_hdr_update_iter(hdr, dxpl_id, min_dblock_size) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTUPDATE, FAIL, "unable to update block iterator") + + /* Retrieve information about current iterator position */ + if(H5HF_man_iter_curr(&hdr->next_block, &next_row, NULL, &next_entry, &iblock) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "unable to retrieve current block iterator location") + HDassert(next_row < iblock->nrows); + H5_CHECKED_ASSIGN(next_size, size_t, hdr->man_dtable.row_block_size[next_row], hsize_t); + + /* Check for skipping over blocks */ + if(min_dblock_size > next_size) { +HDfprintf(stderr, "%s: Skipping direct block sizes not supported, min_dblock_size = %Zu, next_size = %Zu\n", FUNC, min_dblock_size, next_size); +HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "skipping direct block sizes not supported yet") + } /* end if */ + + /* Advance "next block" iterator to next direct block entry */ + if(H5HF_hdr_inc_iter(hdr, (hsize_t)next_size, 1) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment 'next block' iterator") + + /* Create new direct block at current location*/ + if(H5HF_man_dblock_create(dxpl_id, hdr, iblock, next_entry, &dblock_addr, ret_sec_node) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block") + } /* end else */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_new() */ + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_protect + * + * Purpose: Convenience wrapper around H5AC_protect on a direct block + * (Use H5AC_unprotect to unprotect it for now) + * + * Return: Pointer to direct block on success, NULL on failure + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * Apr 17 2006 + * + *------------------------------------------------------------------------- + */ +H5HF_direct_t * +H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr, + size_t dblock_size, H5HF_indirect_t *par_iblock, unsigned par_entry, + unsigned flags) +{ + H5HF_direct_t *dblock; /* Direct block from cache */ + H5HF_dblock_cache_ud_t udata; /* parent and other infor for deserializing direct block */ + H5HF_direct_t *ret_value = NULL; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(hdr); + HDassert(H5F_addr_defined(dblock_addr)); + HDassert(dblock_size > 0); + + /* only H5AC__READ_ONLY_FLAG may appear in flags */ + HDassert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0); + + /* Set up parent info */ + udata.par_info.hdr = hdr; + udata.par_info.iblock = par_iblock; + udata.par_info.entry = par_entry; + + /* set up the file pointer in the user data */ + udata.f = hdr->f; + + /* set up the direct block size */ + udata.dblock_size = dblock_size; + + /* compute the on disk image size -- observe that odi_size and + * dblock_size will be identical if there is no filtering. + */ + if(hdr->filter_len > 0) { + if(par_iblock == NULL) { + udata.odi_size = hdr->pline_root_direct_size; + udata.filter_mask = hdr->pline_root_direct_filter_mask; + } /* end if */ + else { + /* Sanity check */ + HDassert(H5F_addr_eq(par_iblock->ents[par_entry].addr, dblock_addr)); + + /* Set up parameters to read filtered direct block */ + udata.odi_size = par_iblock->filt_ents[par_entry].size; + udata.filter_mask = par_iblock->filt_ents[par_entry].filter_mask; + } /* end else */ + } /* end if */ + else { + udata.odi_size = dblock_size; + udata.filter_mask = 0; + } /* end else */ + + /* Reset compression context info */ + udata.decompressed = FALSE; + udata.dblk = NULL; + + /* Protect the direct block */ + if(NULL == (dblock = (H5HF_direct_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, &udata, flags))) + HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap direct block") + + /* Set the return value */ + ret_value = dblock; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_protect() */ + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_locate + * + * Purpose: Locate a direct block in a managed heap + * + * Return: SUCCEED/FAIL + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * May 8 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off, + H5HF_indirect_t **ret_iblock, unsigned *ret_entry, hbool_t *ret_did_protect, + unsigned flags) +{ + haddr_t iblock_addr; /* Indirect block's address */ + H5HF_indirect_t *iblock; /* Pointer to indirect block */ + hbool_t did_protect; /* Whether we protected the indirect block or not */ + unsigned row, col; /* Row & column for object's block */ + unsigned entry; /* Entry of block */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(hdr); + HDassert(hdr->man_dtable.curr_root_rows); /* Only works for heaps with indirect root block */ + HDassert(ret_iblock); + HDassert(ret_did_protect); + + /* only H5AC__READ_ONLY_FLAG may appear in flags */ + HDassert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0); + + /* Look up row & column for object */ + if(H5HF_dtable_lookup(&hdr->man_dtable, obj_off, &row, &col) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of object") + + /* Set initial indirect block info */ + iblock_addr = hdr->man_dtable.table_addr; + + /* Lock root indirect block */ + if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, hdr->man_dtable.curr_root_rows, NULL, 0, FALSE, flags, &did_protect))) + HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block") + + /* Check for indirect block row */ + while(row >= hdr->man_dtable.max_direct_rows) { + H5HF_indirect_t *new_iblock; /* Pointer to new indirect block */ + hbool_t new_did_protect; /* Whether we protected the indirect block or not */ + unsigned nrows; /* Number of rows in new indirect block */ + unsigned cache_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting parent indirect block */ + + /* Compute # of rows in child indirect block */ + nrows = (H5VM_log2_gen(hdr->man_dtable.row_block_size[row]) - hdr->man_dtable.first_row_bits) + 1; + HDassert(nrows < iblock->nrows); /* child must be smaller than parent */ + + /* Compute indirect block's entry */ + entry = (row * hdr->man_dtable.cparam.width) + col; + + /* Locate child indirect block */ + iblock_addr = iblock->ents[entry].addr; + + /* Check if we need to (re-)create the child indirect block */ + if(!H5F_addr_defined(iblock_addr)) { + if(H5HF_man_iblock_create(hdr, dxpl_id, iblock, entry, nrows, nrows, &iblock_addr) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap indirect block") + + /* Indicate that the parent indirect block was modified */ + cache_flags |= H5AC__DIRTIED_FLAG; + } /* end if */ + + /* Lock child indirect block */ + if(NULL == (new_iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, nrows, iblock, entry, FALSE, flags, &new_did_protect))) + HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block") + + /* Release the current indirect block */ + if(H5HF_man_iblock_unprotect(iblock, dxpl_id, cache_flags, did_protect) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block") + + /* Switch variables to use new indirect block */ + iblock = new_iblock; + did_protect = new_did_protect; + + /* Look up row & column in new indirect block for object */ + if(H5HF_dtable_lookup(&hdr->man_dtable, (obj_off - iblock->block_off), &row, &col) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of object") + HDassert(row < iblock->nrows); /* child must be smaller than parent */ + } /* end while */ + + /* Set return parameters */ + if(ret_entry) + *ret_entry = (row * hdr->man_dtable.cparam.width) + col; + *ret_iblock = iblock; + *ret_did_protect = did_protect; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_locate() */ + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_delete + * + * Purpose: Delete a managed direct block + * + * Note: This routine does _not_ modify any indirect block that points + * to this direct block, it is assumed that the whole heap is + * being deleted. (H5HF_man_dblock_destroy modifies the indirect + * block) + * + * Return: SUCCEED/FAIL + * + * Programmer: Quincey Koziol + * koziol@hdfgroup.org + * Aug 7 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5HF_man_dblock_delete(H5F_t *f, hid_t dxpl_id, haddr_t dblock_addr, + hsize_t dblock_size) +{ + unsigned dblock_status = 0; /* Direct block's status in the metadata cache */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(f); + HDassert(H5F_addr_defined(dblock_addr)); + + /* Check the direct block's status in the metadata cache */ + if(H5AC_get_entry_status(f, dblock_addr, &dblock_status) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "unable to check metadata cache status for direct block") + + /* If the direct block is in the cache, expunge it now */ + if(dblock_status & H5AC_ES__IN_CACHE) { + /* Sanity checks on direct block */ + HDassert(!(dblock_status & H5AC_ES__IS_PINNED)); + HDassert(!(dblock_status & H5AC_ES__IS_PROTECTED)); + + /* Evict the direct block from the metadata cache */ + if(H5AC_expunge_entry(f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, H5AC__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "unable to remove direct block from cache") + } /* end if */ + + /* Check if the direct block is NOT currently allocated in temp. file space */ + /* (temp. file space does not need to be freed) */ + if(!H5F_IS_TMP_ADDR(f, dblock_addr)) { + /* Release direct block's disk space */ + /* (XXX: Under the best of circumstances, this block's space in the file + * would be freed in the H5AC_expunge_entry() call above (and the + * H5AC__FREE_FILE_SPACE_FLAG used there), but since the direct + * block structure might have a different size on disk than in + * the heap's 'abstract' address space, we would need to set the + * "file_size" field for the direct block structure. In order to + * do that, we'd have to protect/unprotect the direct block and + * that would add a bunch of unnecessary overhead to the process, + * so we just release the file space here, directly. When the + * revised metadata cache is operating, it will "know" the file + * size of each entry in the cache and we can the the + * H5AC_expunge_entry() method. -QAK) + */ + if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, dblock_addr, dblock_size) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap direct block") + } /* end if */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_delete() */ + + +/*------------------------------------------------------------------------- + * Function: H5HF_man_dblock_dest + * + * Purpose: Destroys a fractal heap direct block in memory. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * Feb 27 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5HF_man_dblock_dest(H5HF_direct_t *dblock) +{ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* + * Check arguments. + */ + HDassert(dblock); + + /* Decrement reference count on shared fractal heap info */ + HDassert(dblock->hdr != NULL); + if(H5HF_hdr_decr(dblock->hdr) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared heap header") + if(dblock->parent) + if(H5HF_iblock_decr(dblock->parent) < 0) + HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block") + + /* Free block's buffer */ + dblock->blk = H5FL_BLK_FREE(direct_block, dblock->blk); + + /* Free fractal heap direct block info */ + dblock = H5FL_FREE(H5HF_direct_t, dblock); + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5HF_man_dblock_dest() */ + |