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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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Open object info algorithms.
*
* These are used to track the objects currently open in a file, for various
* internal mechanisms which need to be aware of such things.
*
*/
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FLprivate.h" /* Free lists */
#include "H5FOprivate.h" /* File objects */
#define PABLO_MASK H5FO_mask
/* Interface initialization */
static int interface_initialize_g = 0;
#define INTERFACE_INIT NULL
/* Private typedefs */
/* Information about object objects in a file */
typedef struct H5FO_open_obj_t {
haddr_t addr; /* Address of object header for object */
/* THIS MUST BE FIRST FOR TBBT ROUTINES */
hid_t id; /* Current ID for object */
} H5FO_open_obj_t;
/* Declare a free list to manage the H5FO_open_obj_t struct */
H5FL_DEFINE_STATIC(H5FO_open_obj_t);
/*--------------------------------------------------------------------------
NAME
H5FO_create
PURPOSE
Create an open object info set
USAGE
herr_t H5FO_create(f)
H5F_t *f; IN/OUT: File to create opened object info set for
RETURNS
Returns non-negative on success, negative on failure
DESCRIPTION
Create a new open object info set.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5FO_create(H5F_t *f)
{
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FO_create,FAIL);
/* Sanity check */
assert(f);
assert(f->shared);
/* Create TBBT used to store open object info */
if((f->shared->open_objs=H5TB_fast_dmake(H5TB_FAST_HADDR_COMPARE))==NULL)
HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to create open object TBBT");
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5FO_create() */
/*--------------------------------------------------------------------------
NAME
H5FO_opened
PURPOSE
Checks if an object at an address is already open in the file.
USAGE
hid_t H5FO_opened(f,addr)
const H5F_t *f; IN: File to check opened object info set
haddr_t addr; IN: Address of object to check
RETURNS
Returns a non-negative ID for the object on success, negative on failure
DESCRIPTION
Check is an object at an address (the address of the object's object header)
is already open in the file and return the ID for that object if it is open.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
hid_t
H5FO_opened(const H5F_t *f, haddr_t addr)
{
H5TB_NODE *obj_node; /* TBBT node holding open object */
H5FO_open_obj_t *open_obj; /* Information about open object */
hid_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5FO_opened,FAIL);
/* Sanity check */
assert(f);
assert(f->shared);
assert(f->shared->open_objs);
assert(H5F_addr_defined(addr));
/* Get the object node from the TBBT */
if((obj_node=H5TB_dfind(f->shared->open_objs,&addr,NULL))!=NULL) {
open_obj=H5TB_NODE_DATA(obj_node);
assert(open_obj);
ret_value=open_obj->id;
assert(ret_value>0);
} /* end if */
else
ret_value=FAIL;
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5FO_opened() */
/*--------------------------------------------------------------------------
NAME
H5FO_insert
PURPOSE
Insert a newly opened object/ID pair into the opened object info set
USAGE
herr_t H5FO_insert(f,addr,id)
H5F_t *f; IN/OUT: File's opened object info set
haddr_t addr; IN: Address of object to insert
hid_t id; IN: ID of object to insert
RETURNS
Returns a non-negative on success, negative on failure
DESCRIPTION
Insert an object/ID pair into the opened object info set.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5FO_insert(H5F_t *f, haddr_t addr, hid_t id)
{
H5FO_open_obj_t *open_obj; /* Information about open object */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FO_insert,FAIL);
/* Sanity check */
assert(f);
assert(f->shared);
assert(f->shared->open_objs);
assert(H5F_addr_defined(addr));
assert(id>0);
/* Allocate new opened object information structure */
if((open_obj=H5FL_MALLOC(H5FO_open_obj_t))==NULL)
HGOTO_ERROR(H5E_CACHE,H5E_NOSPACE,FAIL,"memory allocation failed");
/* Assign information */
open_obj->addr=addr;
open_obj->id=id;
/* Insert into TBBT */
if(H5TB_dins(f->shared->open_objs,open_obj,open_obj)==NULL)
HGOTO_ERROR(H5E_CACHE,H5E_CANTINSERT,FAIL,"can't insert object into TBBT");
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5FO_insert() */
/*--------------------------------------------------------------------------
NAME
H5FO_delete
PURPOSE
Remove an opened object/ID pair from the opened object info set
USAGE
herr_t H5FO_delete(f,addr)
H5F_t *f; IN/OUT: File's opened object info set
haddr_t addr; IN: Address of object to remove
RETURNS
Returns a non-negative on success, negative on failure
DESCRIPTION
Remove an object/ID pair from the opened object info.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5FO_delete(H5F_t *f, haddr_t addr)
{
H5TB_NODE *obj_node; /* TBBT node holding open object */
H5FO_open_obj_t *open_obj; /* Information about open object */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FO_delete,FAIL);
/* Sanity check */
assert(f);
assert(f->shared);
assert(f->shared->open_objs);
assert(H5F_addr_defined(addr));
/* Get the object node from the TBBT */
if((obj_node=H5TB_dfind(f->shared->open_objs,&addr,NULL))==NULL)
HGOTO_ERROR(H5E_CACHE,H5E_NOTFOUND,FAIL,"can't locate object in TBBT");
/* Remove from TBBT */
if((open_obj=H5TB_rem(&f->shared->open_objs->root,obj_node,NULL))==NULL)
HGOTO_ERROR(H5E_CACHE,H5E_CANTRELEASE,FAIL,"can't remove object from TBBT");
/* Release the object information */
H5FL_FREE(H5FO_open_obj_t,open_obj);
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5FO_delete() */
/*--------------------------------------------------------------------------
NAME
H5FO_dest
PURPOSE
Destroy an open object info set
USAGE
herr_t H5FO_create(f)
H5F_t *f; IN/OUT: File's opened object info set
RETURNS
Returns a non-negative on success, negative on failure
DESCRIPTION
Destroy an existing open object info set.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5FO_dest(H5F_t *f)
{
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5FO_dest,FAIL);
/* Sanity check */
assert(f);
assert(f->shared);
assert(f->shared->open_objs);
/* Check if the object info set is empty */
if(H5TB_count(f->shared->open_objs)!=0)
HGOTO_ERROR(H5E_CACHE, H5E_CANTRELEASE, FAIL, "objects still in open object info set");
/* Release the open object info set TBBT */
f->shared->open_objs=H5TB_dfree(f->shared->open_objs,NULL,NULL);
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5FO_dest() */
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