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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: H5HF.c
* Feb 24 2006
* Quincey Koziol <koziol@ncsa.uiuc.edu>
*
* Purpose: Implements a "fractal heap" for storing variable-
* length objects in a file.
*
* Please see the documentation in:
* doc/html/TechNotes/FractalHeap.html for a full description
* of how they work, etc.
*
*-------------------------------------------------------------------------
*/
/****************/
/* 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 "H5MFprivate.h" /* File memory management */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/* Declare a free list to manage the H5HF_t struct */
H5FL_DEFINE(H5HF_t);
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5HF_create
*
* Purpose: Creates a new empty fractal heap in the file.
*
* Return: Non-negative on success (with address of new fractal heap
* filled in), negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Feb 24 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF_create(H5F_t *f, hid_t dxpl_id, H5HF_create_t *cparam, haddr_t *addr_p)
{
H5HF_t *fh = NULL; /* The new fractal heap header information */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5HF_create, FAIL)
/*
* Check arguments.
*/
HDassert(f);
HDassert(cparam);
HDassert(addr_p);
/*
* Allocate file and memory data structures.
*/
if(NULL == (fh = H5FL_MALLOC(H5HF_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for fractal heap header")
/* Reset the metadata cache info for the heap header */
HDmemset(&fh->cache_info, 0, sizeof(H5AC_info_t));
/* Allocate space for the header on disk */
if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_FHEAP_HDR, dxpl_id, (hsize_t)H5HF_HEADER_SIZE(f))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap header")
/* Initialize shared fractal heap info */
if(H5HF_shared_create(f, fh, *addr_p, cparam) < 0)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create shared fractal heap info")
/* Cache the new fractal heap header */
if(H5AC_set(f, dxpl_id, H5AC_FHEAP_HDR, *addr_p, fh, H5AC__NO_FLAGS_SET) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add fractal heap header to cache")
done:
if(ret_value < 0) {
if(fh)
(void)H5HF_cache_hdr_dest(f, fh);
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_create() */
/*-------------------------------------------------------------------------
* Function: H5HF_insert
*
* Purpose: Insert a new object into a fractal heap.
*
* Return: Non-negative on success (with heap ID of new object
* filled in), negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Feb 24 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t size,
const void *obj, void *id/*out*/)
{
H5HF_t *fh = NULL; /* The fractal heap header information */
H5HF_shared_t *shared; /* Shared fractal heap information */
unsigned hdr_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for header */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI(H5HF_insert, FAIL)
#ifdef QAK
HDfprintf(stderr, "%s: size = %Zu\n", FUNC, size);
#endif /* QAK */
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(size > 0);
HDassert(obj);
HDassert(id);
/*
* Load the fractal heap header.
*/
if(NULL == (fh = H5AC_protect(f, dxpl_id, H5AC_FHEAP_HDR, addr, NULL, NULL, H5AC_WRITE)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap header")
/* Get the pointer to the shared fractal heap info */
shared = H5RC_GET_OBJ(fh->shared);
HDassert(shared);
/* Check if object is large enough to be standalone */
if(size >= shared->standalone_size) {
HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "standalone blocks not supported yet")
} /* end if */
else {
/* Check if we are in "append only" mode, or if there's enough room for the object */
if(shared->write_once) {
HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "'write once' managed blocks not supported yet")
} /* end if */
else {
H5HF_section_free_node_t *sec_node; /* Pointer to free space section */
/* Find free space in heap */
if(H5HF_man_find(fh->shared, dxpl_id, size, &sec_node) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate space in fractal heap")
/* Use free space for allocating object */
if(H5HF_man_insert(fh->shared, dxpl_id, sec_node, size, obj, id) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate space for object in fractal heap")
} /* end else */
} /* end else */
/* Check for making header dirty */
if(shared->dirty)
hdr_flags |= H5AC__DIRTIED_FLAG;
done:
if(fh && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, addr, fh, hdr_flags) < 0)
HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_insert() */
/*-------------------------------------------------------------------------
* Function: H5HF_read
*
* Purpose: Read an object from a fractal heap into a buffer
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Mar 18 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF_read(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_id,
void *obj/*out*/)
{
H5HF_t *fh = NULL; /* The fractal heap header information */
H5HF_shared_t *shared; /* Shared fractal heap information */
const uint8_t *id = (const uint8_t *)_id; /* Object ID */
hsize_t obj_off; /* Object's offset in heap */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI(H5HF_read, FAIL)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(id);
HDassert(obj);
/*
* Load the fractal heap header.
*/
if(NULL == (fh = H5AC_protect(f, dxpl_id, H5AC_FHEAP_HDR, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap header")
/* Get the pointer to the shared fractal heap info */
shared = H5RC_GET_OBJ(fh->shared);
HDassert(shared);
/* Decode the offset within the heap */
UINT64DECODE_VAR(id, obj_off, shared->heap_off_size);
#ifdef QAK
HDfprintf(stderr, "%s: obj_off = %Hu\n", FUNC, obj_off);
#endif /* QAK */
/* Check for standalone object */
if(obj_off & 0) {
HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "standalone blocks not supported yet")
} /* end if */
else {
/* Read object from managed heap blocks */
if(H5HF_man_read(fh->shared, dxpl_id, obj_off, obj) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't read object from fractal heap")
} /* end else */
done:
if(fh && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, addr, fh, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF_read() */
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