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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 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://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Ochunk.c
* Jul 13 2008
* Quincey Koziol <koziol@hdfgroup.org>
*
* Purpose: Object header chunk routines.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5O_PACKAGE /*suppress error about including H5Opkg */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Opkg.h" /* Object headers */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/* Declare the free list for H5O_chunk_proxy_t's */
H5FL_DEFINE(H5O_chunk_proxy_t);
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5O_chunk_add
*
* Purpose: Add new chunk for object header to metadata cache
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jul 13 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5O_chunk_add(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
{
H5O_chunk_proxy_t *chk_proxy = NULL; /* Proxy for chunk, to mark it dirty in the cache */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5O_chunk_add, FAIL)
/* check args */
HDassert(f);
HDassert(oh);
HDassert(idx < oh->nchunks);
HDassert(idx > 0);
/* Allocate space for the object header data structure */
if(NULL == (chk_proxy = H5FL_CALLOC(H5O_chunk_proxy_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Set the values in the chunk proxy */
chk_proxy->oh = oh;
chk_proxy->chunkno = idx;
/* Increment reference count on object header */
if(H5O_inc_rc(oh) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, FAIL, "can't increment reference count on object header")
/* Insert the chunk proxy into the cache */
if(H5AC_set(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header chunk")
chk_proxy = NULL;
done:
if(ret_value < 0)
if(chk_proxy)
chk_proxy = H5FL_FREE(H5O_chunk_proxy_t, chk_proxy);
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_chunk_add() */
/*-------------------------------------------------------------------------
* Function: H5O_chunk_protect
*
* Purpose: Protect an object header chunk for modifications
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jul 17 2008
*
*-------------------------------------------------------------------------
*/
H5O_chunk_proxy_t *
H5O_chunk_protect(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
{
H5O_chunk_proxy_t *chk_proxy; /* Proxy for protected chunk */
H5O_chunk_proxy_t *ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5O_chunk_protect, NULL)
/* check args */
HDassert(f);
HDassert(oh);
HDassert(idx < oh->nchunks);
/* Check for protecting first chunk */
if(0 == idx) {
/* Create new "fake" chunk proxy for first chunk */
/* (since the first chunk is already handled by the H5O_t object) */
if(NULL == (chk_proxy = H5FL_CALLOC(H5O_chunk_proxy_t)))
HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, NULL, "memory allocation failed")
/* Increment reference count on object header */
if(H5O_inc_rc(oh) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "can't increment reference count on object header")
/* Set chunk proxy fields */
chk_proxy->oh = oh;
chk_proxy->chunkno = idx;
} /* end if */
else {
H5O_chk_cache_ud_t chk_udata; /* User data for loading chunk */
/* Construct the user data for protecting chunk proxy */
/* (and _not_ decoding it) */
HDmemset(&chk_udata, 0, sizeof(chk_udata));
chk_udata.oh = oh;
chk_udata.chunkno = idx;
chk_udata.chunk_size = oh->chunk[idx].size;
/* Get the chunk proxy */
if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC_WRITE)))
HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header chunk")
/* Sanity check */
HDassert(chk_proxy->oh == oh);
HDassert(chk_proxy->chunkno == idx);
} /* end else */
/* Set return value */
ret_value = chk_proxy;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_chunk_protect() */
/*-------------------------------------------------------------------------
* Function: H5O_chunk_unprotect
*
* Purpose: Unprotect an object header chunk after modifications
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jul 17 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5O_chunk_unprotect(H5F_t *f, hid_t dxpl_id, H5O_chunk_proxy_t *chk_proxy,
unsigned chk_flags)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5O_chunk_unprotect, FAIL)
/* check args */
HDassert(f);
HDassert(chk_proxy);
HDassert(!(chk_flags & (unsigned)~(H5AC__DIRTIED_FLAG | H5AC__SIZE_CHANGED_FLAG)));
/* Check for releasing first chunk */
if(0 == chk_proxy->chunkno) {
/* Check for resizing the first chunk */
if(chk_flags & H5AC__SIZE_CHANGED_FLAG) {
/* Resize object header in cache */
if(H5AC_resize_pinned_entry(chk_proxy->oh, chk_proxy->oh->chunk[0].size) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTRESIZE, FAIL, "unable to resize chunk in cache")
} /* end if */
/* Check for dirtying the first chunk */
if(chk_flags & H5AC__DIRTIED_FLAG) {
/* Mark object header as dirty in cache */
if(H5AC_mark_pinned_or_protected_entry_dirty(chk_proxy->oh) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
} /* end else/if */
/* Decrement reference count of object header */
if(H5O_dec_rc(chk_proxy->oh) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "can't decrement reference count on object header")
/* Free fake chunk proxy */
chk_proxy = H5FL_FREE(H5O_chunk_proxy_t, chk_proxy);
} /* end if */
else {
/* Release the chunk proxy from the cache, marking it dirty */
if(H5AC_unprotect(f, dxpl_id, H5AC_OHDR_CHK, chk_proxy->oh->chunk[chk_proxy->chunkno].addr, chk_proxy, chk_flags) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_chunk_unprotect() */
/*-------------------------------------------------------------------------
* Function: H5O_chunk_update_idx
*
* Purpose: Update the chunk index for a chunk proxy
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jul 13 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5O_chunk_update_idx(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
{
H5O_chunk_proxy_t *chk_proxy; /* Proxy for chunk, to mark it dirty in the cache */
H5O_chk_cache_ud_t chk_udata; /* User data for loading chunk */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5O_chunk_update_idx, FAIL)
/* check args */
HDassert(f);
HDassert(oh);
HDassert(idx < oh->nchunks);
HDassert(idx > 0);
/* Construct the user data for protecting chunk proxy */
/* (and _not_ decoding it) */
HDmemset(&chk_udata, 0, sizeof(chk_udata));
chk_udata.oh = oh;
chk_udata.chunkno = idx;
chk_udata.chunk_size = oh->chunk[idx].size;
/* Get the chunk proxy */
if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC_WRITE)))
HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
/* Update index for chunk proxy in cache */
chk_proxy->chunkno = idx;
/* Release the chunk proxy from the cache, marking it deleted */
if(H5AC_unprotect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, H5AC__DIRTIED_FLAG) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_chunk_update_idx() */
/*-------------------------------------------------------------------------
* Function: H5O_chunk_delete
*
* Purpose: Notify metadata cache that a chunk has been deleted
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jul 13 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5O_chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
{
H5O_chunk_proxy_t *chk_proxy; /* Proxy for chunk, to mark it dirty in the cache */
H5O_chk_cache_ud_t chk_udata; /* User data for loading chunk */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5O_chunk_delete, FAIL)
/* check args */
HDassert(f);
HDassert(oh);
HDassert(idx < oh->nchunks);
HDassert(idx > 0);
/* Construct the user data for protecting chunk proxy */
/* (and _not_ decoding it) */
HDmemset(&chk_udata, 0, sizeof(chk_udata));
chk_udata.oh = oh;
chk_udata.chunkno = idx;
chk_udata.chunk_size = oh->chunk[idx].size;
/* Get the chunk proxy */
if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC_WRITE)))
HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
/* Sanity check */
HDassert(chk_proxy->oh == oh);
HDassert(chk_proxy->chunkno == idx);
/* Release the chunk proxy from the cache, marking it deleted */
if(H5AC_unprotect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, (H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG)) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_chunk_delete() */
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