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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: H5EA.c
* Jun 17 2008
* Quincey Koziol <koziol@hdfgroup.org>
*
* Purpose: Implements an "extensible array" for storing elements
* in an array whose high bounds can extend and shrink.
*
* Please see the documentation in:
* doc/html/TechNotes/ExtensibleArray.html for a full
* description of how they work, etc.
*
*-------------------------------------------------------------------------
*/
/**********************/
/* Module Declaration */
/**********************/
#define H5EA_MODULE
/***********************/
/* Other Packages Used */
/***********************/
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5EApkg.h" /* Extensible Arrays */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/* HDF5 API Entered variable */
/* (move to H5.c when new FUNC_ENTER macros in actual use -QAK) */
hbool_t H5_api_entered_g = FALSE;
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Declare a free list to manage the H5EA_t struct */
H5FL_DEFINE_STATIC(H5EA_t);
/*-------------------------------------------------------------------------
* Function: H5EA_create
*
* Purpose: Creates a new empty extensible array in the file.
*
* Return: Pointer to earray wrapper on success
* NULL on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jun 17 2008
*
*-------------------------------------------------------------------------
*/
BEGIN_FUNC(PRIV, ERR,
H5EA_t *, NULL, NULL,
H5EA_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam))
/* Local variables */
H5EA_t *ea = NULL; /* Pointer to new extensible array */
H5EA_hdr_t *hdr = NULL; /* The extensible array header information */
haddr_t ea_addr; /* Array header address */
#ifdef QAK
HDfprintf(stderr, "%s: Called\n", FUNC);
#endif /* QAK */
/*
* Check arguments.
*/
HDassert(f);
HDassert(cparam);
/* Create extensible array header */
if(HADDR_UNDEF == (ea_addr = H5EA__hdr_create(f, dxpl_id, cparam)))
H5E_THROW(H5E_CANTINIT, "can't create extensible array header")
/* Allocate extensible array wrapper */
if(NULL == (ea = H5FL_MALLOC(H5EA_t)))
H5E_THROW(H5E_CANTALLOC, "memory allocation failed for extensible array info")
/* Lock the array header into memory */
if(NULL == (hdr = (H5EA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_EARRAY_HDR, ea_addr, NULL, NULL, H5AC_WRITE)))
H5E_THROW(H5E_CANTPROTECT, "unable to load extensible array header")
/* Point extensible array wrapper at header and bump it's ref count */
ea->hdr = hdr;
if(H5EA__hdr_incr(ea->hdr) < 0)
H5E_THROW(H5E_CANTINC, "can't increment reference count on shared array header")
/* Increment # of files using this array header */
if(H5EA__hdr_fuse_incr(ea->hdr) < 0)
H5E_THROW(H5E_CANTINC, "can't increment file reference count on shared array header")
/* Set file pointer for this array open context */
ea->f = f;
/* Set the return value */
ret_value = ea;
CATCH
if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_EARRAY_HDR, ea_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
if(!ret_value)
if(ea && H5EA_close(ea, dxpl_id) < 0)
H5E_THROW(H5E_CLOSEERROR, "unable to close extensible array")
END_FUNC(PRIV) /* end H5EA_create() */
/*-------------------------------------------------------------------------
* Function: H5EA_get_nelmts
*
* Purpose: Query the current number of elements in array
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Aug 21 2008
*
*-------------------------------------------------------------------------
*/
BEGIN_FUNC(PRIV, NOERR,
herr_t, SUCCEED, -,
H5EA_get_nelmts(const H5EA_t *ea, hsize_t *nelmts))
/* Local variables */
#ifdef QAK
HDfprintf(stderr, "%s: Called\n", FUNC);
#endif /* QAK */
/*
* Check arguments.
*/
HDassert(ea);
HDassert(nelmts);
/* Placeholder value */
*nelmts = 0;
END_FUNC(PRIV) /* end H5EA_get_nelmts() */
/*-------------------------------------------------------------------------
* Function: H5EA_get_addr
*
* Purpose: Query the address of the array
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Aug 21 2008
*
*-------------------------------------------------------------------------
*/
BEGIN_FUNC(PRIV, NOERR,
herr_t, SUCCEED, -,
H5EA_get_addr(const H5EA_t *ea, haddr_t *addr))
/* Local variables */
#ifdef QAK
HDfprintf(stderr, "%s: Called\n", FUNC);
#endif /* QAK */
/*
* Check arguments.
*/
HDassert(ea);
HDassert(ea->hdr);
HDassert(addr);
/* Retrieve the address of the extensible array's header */
*addr = ea->hdr->addr;
END_FUNC(PRIV) /* end H5EA_get_addr() */
/*-------------------------------------------------------------------------
* Function: H5EA_get_stats
*
* Purpose: Query the metadata stats of an array
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Aug 21 2008
*
*-------------------------------------------------------------------------
*/
BEGIN_FUNC(PRIV, NOERR,
herr_t, SUCCEED, -,
H5EA_get_stats(const H5EA_t *ea, H5EA_stat_t *stats))
/* Local variables */
#ifdef QAK
HDfprintf(stderr, "%s: Called\n", FUNC);
#endif /* QAK */
/*
* Check arguments.
*/
HDassert(ea);
HDassert(stats);
/* Placeholder value */
HDmemset(stats, 0, sizeof(*stats));
END_FUNC(PRIV) /* end H5EA_get_stats() */
/*-------------------------------------------------------------------------
* Function: H5EA_delete
*
* Purpose: Delete an extensible array
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Aug 28 2008
*
*-------------------------------------------------------------------------
*/
BEGIN_FUNC(PRIV, ERR,
herr_t, SUCCEED, FAIL,
H5EA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr))
/* Local variables */
H5EA_hdr_t *hdr = NULL; /* The fractal heap header information */
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(ea_addr));
/* Lock the array header into memory */
#ifdef QAK
HDfprintf(stderr, "%s: ea_addr = %a\n", FUNC, ea_addr);
#endif /* QAK */
if(NULL == (hdr = (H5EA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_EARRAY_HDR, ea_addr, NULL, NULL, H5AC_WRITE)))
H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array header, address = %llu", (unsigned long_long)ea_addr)
/* Check for files using shared array header */
if(hdr->file_rc)
hdr->pending_delete = TRUE;
else {
/* Set the shared array header's file context for this operation */
hdr->f = f;
/* Delete array now, starting with header (unprotects header) */
if(H5EA__hdr_delete(hdr, dxpl_id) < 0)
H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array")
hdr = NULL;
} /* end if */
CATCH
/* Unprotect the header, if an error occurred */
if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_EARRAY_HDR, ea_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
END_FUNC(PRIV) /* end H5EA_delete() */
/*-------------------------------------------------------------------------
* Function: H5EA_close
*
* Purpose: Close an extensible array
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Aug 21 2008
*
*-------------------------------------------------------------------------
*/
BEGIN_FUNC(PRIV, ERR,
herr_t, SUCCEED, FAIL,
H5EA_close(H5EA_t *ea, hid_t dxpl_id))
/* Local variables */
hbool_t pending_delete = FALSE; /* Whether the array is pending deletion */
haddr_t ea_addr = HADDR_UNDEF; /* Address of array (for deletion) */
#ifdef QAK
HDfprintf(stderr, "%s: Called\n", FUNC);
#endif /* QAK */
/*
* Check arguments.
*/
HDassert(ea);
/* Decrement file reference & check if this is the last open extensible array using the shared array header */
if(0 == H5EA__hdr_fuse_decr(ea->hdr)) {
/* Set the shared array header's file context for this operation */
ea->hdr->f = ea->f;
/* Shut down anything that can't be put in the header's 'flush' callback */
/* Check for pending array deletion */
if(ea->hdr->pending_delete) {
/* Set local info, so array deletion can occur after decrementing the
* header's ref count
*/
pending_delete = TRUE;
ea_addr = ea->hdr->addr;
} /* end if */
} /* end if */
/* Decrement the reference count on the array header */
/* (don't put in H5EA_hdr_fuse_decr() as the array header may be evicted
* immediately -QAK)
*/
if(H5EA__hdr_decr(ea->hdr) < 0)
H5E_THROW(H5E_CANTDEC, "can't decrement reference count on shared array header")
/* Check for pending array deletion */
if(pending_delete) {
H5EA_hdr_t *hdr; /* Another pointer to extensible array header */
/* Lock the array header into memory */
if(NULL == (hdr = (H5EA_hdr_t *)H5AC_protect(ea->f, dxpl_id, H5AC_EARRAY_HDR, ea_addr, NULL, NULL, H5AC_WRITE)))
H5E_THROW(H5E_CANTLOAD, "unable to load extensible array header")
/* Set the shared array header's file context for this operation */
hdr->f = ea->f;
/* Delete array, starting with header (unprotects header) */
if(H5EA__hdr_delete(hdr, dxpl_id) < 0)
H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array")
} /* end if */
/* Release the extensible array wrapper */
(void)H5FL_FREE(H5EA_t, ea);
CATCH
END_FUNC(PRIV) /* end H5EA_close() */
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