hdf5/src/H5R.c
Robb Matzke e2e5476fa5 [svn-r1087] Changes since 19990218
----------------------

./src/H5F.c
./src/H5private.h
./src/H5Ipublic.h
./src/H5O.c
	Fixed a rather nasty bug with file closing that caused the
	file boot block to be updated incorrectly, effectively
	truncating the file.  The bug I fixed was triggered by:

	    1. Create a file, F
	    2. Open an object, X
	    3. Close file F
	    4. Reopen file F for read/write.
	    5. Create and close some objects
	    6. Close file F
	    7. Close library (exit).

	Step 3 pended the close because object X is still open, but
	the file ID was removed from the H5I_FILE ID group. Step 4
	created a new file because it didn't see any matching file on
	the H5I_FILE ID group.  Step 5 extends the file. Step 6 writes
	the new file boot block to disk. Step 7 closes object X and
	completes the close from step 3, writing the old boot block
	information to disk.

	The new behavior is that step 3 moves the file from the
	H5I_FILE group to the H5I_FILE_CLOSING group. Step 4 searches
	both groups and finds the file. Step 5 extends the file using
	the same H5F_file_t struct as step 3. Step 6 closes the H5F_t
	struct opened in step 3 but not the H5F_file_t struct shared
	by steps 1 and 3. Step 7 closes object X which closes the
	H5F_file_t from step 1, flushing the boot block which was
	shared by all steps.

./src/H5F.c
	Added some bulletproofing to file reference counting and
	removed comments which no longer apply.  Added H5F_flush_all()
	and H5F_close_all() which apply to all files.

./src/H5A.c
./src/H5D.c
./src/H5F.c
./src/H5G.c
./src/H5I.c
./src/H5Iprivate.h
./src/H5R.c
./src/H5RA.c
./src/H5S.c
./src/H5T.c
	Added the new H5I_free_t data type to describe the function
	type to be passed as the `free_func' argument to
	H5I_init_group().

./src/H5I.c
	Bulletproofed the object removal functions. Removed comments
	which no longer apply. Changed global variable names so they
	don't violate the naming scheme. Added H5I_debug() that prints
	the contents of an ID group.  Removed H5I_inc_ref() because it
	isn't used. Reindented a couple of functions.

./src/H5.c
./src/H5G.c
./src/H5Ipublic.h
	Changed H5I_MAXID to H5I_NGROUPS to better relect the fact
	that it's the total number of valid ID groups.

./src/H5Shyper.c
	Changed hyperslab offset arrays to signed quantities to get
	rid of warnings on DEC cluster.

./src/H5Flow.c
./src/H5Fprivate.h
	Changed the objno argument of H5F_addr_pack() to be unsigned
	to get rid of warnings on DEC cluster.
1999-02-20 11:18:51 -05:00

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/****************************************************************************
* NCSA HDF *
* Software Development Group *
* National Center for Supercomputing Applications *
* University of Illinois at Urbana-Champaign *
* 605 E. Springfield, Champaign IL 61820 *
* *
* For conditions of distribution and use, see the accompanying *
* hdf/COPYING file. *
* *
****************************************************************************/
#ifdef RCSID
static char RcsId[] = "@(#)$Revision$";
#endif
/* $Id$ */
#include <H5private.h> /* Generic Functions */
#include <H5Iprivate.h> /* ID Functions */
#include <H5Dprivate.h> /* Datasets */
#include <H5Eprivate.h> /* Error handling */
#include <H5Fprivate.h> /* Files */
#include <H5Gprivate.h> /* Groups */
#include <H5HGprivate.h> /* Global Heaps */
#include <H5MMprivate.h> /* Memory Management */
#include <H5Rprivate.h> /* References */
#include <H5Sprivate.h> /* Dataspaces */
/* Interface initialization */
#define PABLO_MASK H5R_mask
#define INTERFACE_INIT H5R_init_interface
static intn interface_initialize_g = 0;
static herr_t H5R_init_interface(void);
/* Static functions */
static herr_t H5R_create(void *ref, H5G_entry_t *loc, const char *name,
H5R_type_t ref_type, H5S_t *space);
static hid_t H5R_dereference(H5D_t *dset, H5R_type_t ref_type, void *_ref);
static H5S_t * H5R_get_region(H5D_t *dset, H5R_type_t ref_type, void *_ref);
/*--------------------------------------------------------------------------
NAME
H5R_init_interface -- Initialize interface-specific information
USAGE
herr_t H5R_init_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines.
--------------------------------------------------------------------------*/
static herr_t
H5R_init_interface(void)
{
FUNC_ENTER(H5R_init_interface, FAIL);
/* Initialize the atom group for the file IDs */
if (H5I_init_group(H5I_REFERENCE, H5I_REFID_HASHSIZE, H5R_RESERVED_ATOMS,
(H5I_free_t)NULL)<0) {
HRETURN_ERROR (H5E_REFERENCE, H5E_CANTINIT, FAIL,
"unable to initialize interface");
}
FUNC_LEAVE(SUCCEED);
}
/*--------------------------------------------------------------------------
NAME
H5R_term_interface
PURPOSE
Terminate various H5R objects
USAGE
void H5R_term_interface()
RETURNS
void
DESCRIPTION
Release the atom group and any other resources allocated.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
Can't report errors...
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
void
H5R_term_interface(intn status)
{
if (interface_initialize_g>0) {
/* Free ID group */
H5I_destroy_group(H5I_REFERENCE);
}
interface_initialize_g = status;
}
/*--------------------------------------------------------------------------
NAME
H5R_create
PURPOSE
Creates a particular kind of reference for the user
USAGE
herr_t H5R_create(ref, loc, name, ref_type, space)
void *ref; OUT: Reference created
H5G_entry_t *loc; IN: File location used to locate object pointed to
const char *name; IN: Name of object at location LOC_ID of object
pointed to
H5R_type_t ref_type; IN: Type of reference to create
H5S_t *space; IN: Dataspace ID with selection, used for Dataset
Region references.
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Creates a particular type of reference specified with REF_TYPE, in the
space pointed to by REF. The LOC_ID and NAME are used to locate the object
pointed to and the SPACE_ID is used to choose the region pointed to (for
Dataset Region references).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
static herr_t
H5R_create(void *_ref, H5G_entry_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space)
{
H5G_stat_t sb; /* Stat buffer for retrieving OID */
herr_t ret_value = FAIL;
FUNC_ENTER(H5R_create, FAIL);
assert(_ref);
assert(loc);
assert(name);
assert(ref_type>H5R_BADTYPE || ref_type<H5R_MAXTYPE);
if (H5G_get_objinfo (loc, name, 0, &sb)<0)
HGOTO_ERROR (H5E_REFERENCE, H5E_NOTFOUND, FAIL, "unable to stat object");
switch(ref_type) {
case H5R_OBJECT:
{
haddr_t addr;
hobj_ref_t *ref=(hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */
uint8_t *p; /* Pointer to OID to store */
/* Set information for reference */
p=(uint8_t *)ref->oid;
H5F_addr_pack(loc->file,&addr,&sb.objno[0]);
H5F_addr_encode(loc->file,&p,&addr);
break;
}
case H5R_DATASET_REGION:
{
haddr_t addr;
H5HG_t hobjid; /* Heap object ID */
hdset_reg_ref_t *ref=(hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
hssize_t buf_size; /* Size of buffer needed to serialize selection */
uint8_t *p; /* Pointer to OID to store */
uint8_t *buf; /* Buffer to store serialized selection in */
uintn heapid_found; /* Flag for non-zero heap ID found */
uintn u; /* local index */
/* Set up information for dataset region */
/* Return any previous heap block to the free list if we are garbage collecting */
if(loc->file->shared->access_parms->gc_ref) {
/* Check for an existing heap ID in the reference */
for(u=0, heapid_found=0; u<H5R_DSET_REG_REF_BUF_SIZE; u++)
if(ref->heapid[u]!=0) {
heapid_found=1;
break;
} /* end if */
if(heapid_found!=0) {
/* Return heap block to free list */
} /* end if */
} /* end if */
/* Zero the heap ID out, may leak heap space if user is re-using reference and doesn't have garbage collection on */
HDmemset(ref->heapid,H5R_DSET_REG_REF_BUF_SIZE,0);
/* Get the amount of space required to serialize the selection */
if ((buf_size = H5S_select_serial_size(space)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL,
"Invalid amount of space for serializing selection");
/* Increase buffer size to allow for the dataset OID */
buf_size+=sizeof(haddr_t);
/* Allocate the space to store the serialized information */
if (NULL==(buf = H5MM_malloc(buf_size))) {
HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL,
"memory allocation failed");
}
/* Serialize information for dataset OID */
p=(uint8_t *)buf;
H5F_addr_pack(loc->file,&addr,&sb.objno[0]);
H5F_addr_encode(loc->file,&p,&addr);
/* Serialize the selection */
if (H5S_select_serialize(space,p) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL,
"Unable to serialize selection");
/* Save the serialized buffer for later */
if(H5HG_insert(loc->file,buf_size,buf,&hobjid)<0)
HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL,
"Unable to serialize selection");
/* Serialize the heap ID and index for storage in the file */
p=(uint8_t *)ref->heapid;
H5F_addr_encode(loc->file,&p,&hobjid.addr);
INT32ENCODE(p,hobjid.idx);
/* Free the buffer we serialized data in */
H5MM_xfree(buf);
break;
}
case H5R_INTERNAL:
HRETURN_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL,
"Internal references are not yet supported");
case H5R_BADTYPE:
case H5R_MAXTYPE:
default:
assert("unknown reference type" && 0);
HRETURN_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL,
"internal error (unknown reference type)");
} /* end switch */
/* Return success */
ret_value=SUCCEED;
done:
FUNC_LEAVE(ret_value);
} /* end H5R_create() */
/*--------------------------------------------------------------------------
NAME
H5Rcreate
PURPOSE
Creates a particular kind of reference for the user
USAGE
herr_t H5Rcreate(ref, loc_id, name, ref_type, space_id)
void *ref; OUT: Reference created
hid_t loc_id; IN: Location ID used to locate object pointed to
const char *name; IN: Name of object at location LOC_ID of object
pointed to
H5R_type_t ref_type; IN: Type of reference to create
hid_t space_id; IN: Dataspace ID with selection, used for Dataset
Region references.
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Creates a particular type of reference specified with REF_TYPE, in the
space pointed to by REF. The LOC_ID and NAME are used to locate the object
pointed to and the SPACE_ID is used to choose the region pointed to (for
Dataset Region references).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5Rcreate(void *ref, hid_t loc_id, const char *name, H5R_type_t ref_type, hid_t space_id)
{
H5G_entry_t *loc = NULL; /* File location */
H5S_t *space = NULL; /* Pointer to dataspace containing region */
herr_t ret_value = FAIL;
FUNC_ENTER(H5Rcreate, FAIL);
H5TRACE5("e","xisRti",ref,loc_id,name,ref_type,space_id);
/* Check args */
if(ref==NULL)
HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer");
if (NULL==(loc=H5G_loc (loc_id)))
HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a location");
if (!name || !*name)
HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name given");
if(ref_type<=H5R_BADTYPE || ref_type>=H5R_MAXTYPE)
HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type");
if(ref_type!=H5R_OBJECT && ref_type!=H5R_DATASET_REGION)
HRETURN_ERROR (H5E_ARGS, H5E_UNSUPPORTED, FAIL, "reference type not supported");
if (space_id!=(-1) && (H5I_DATASPACE!=H5I_get_type (space_id) || NULL==(space=H5I_object (space_id))))
HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace");
/* Create reference */
if ((ret_value=H5R_create(ref,loc,name,ref_type,space))<0)
HGOTO_ERROR (H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to create reference");
done:
FUNC_LEAVE(ret_value);
} /* end H5Rcreate() */
/*--------------------------------------------------------------------------
NAME
H5R_dereference
PURPOSE
Opens the HDF5 object referenced.
USAGE
hid_t H5R_dereference(ref)
H5D_t *dset; IN: Dataset reference object is in.
H5R_type_t ref_type; IN: Type of reference
void *ref; IN: Reference to open.
RETURNS
Valid ID on success, Negative on failure
DESCRIPTION
Given a reference to some object, open that object and return an ID for
that object.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
Currently only set up to work with references to datasets
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
static hid_t
H5R_dereference(H5D_t *dset, H5R_type_t ref_type, void *_ref)
{
H5D_t *dataset; /* Pointer to dataset to open */
H5G_entry_t ent; /* Symbol table entry */
uint8_t *p; /* Pointer to OID to store */
hid_t ret_value = FAIL;
FUNC_ENTER(H5R_dereference, FAIL);
assert(_ref);
assert(ref_type>H5R_BADTYPE || ref_type<H5R_MAXTYPE);
assert(dset);
/* Initialize the symbol table entry */
HDmemset(&ent,0,sizeof(H5G_entry_t));
ent.type=H5G_NOTHING_CACHED;
ent.file=H5D_get_file(dset);
switch(ref_type) {
case H5R_OBJECT:
{
hobj_ref_t *ref=(hobj_ref_t *)_ref; /* Only object references currently supported */
/*
* Switch on object type, when we implement that feature, always try to
* open a dataset for now
*/
/* Get the object oid */
p=(uint8_t *)ref->oid;
H5F_addr_decode(ent.file,(const uint8_t **)&p,&(ent.header));
break;
} /* end case */
case H5R_DATASET_REGION:
{
hdset_reg_ref_t *ref=(hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
H5HG_t hobjid; /* Heap object ID */
uint8_t *buf; /* Buffer to store serialized selection in */
/* Get the heap ID for the dataset region */
p=(uint8_t *)ref->heapid;
H5F_addr_decode(ent.file,(const uint8_t **)&p,&(hobjid.addr));
INT32DECODE(p,hobjid.idx);
/* Get the dataset region from the heap (allocate inside routine) */
printf("%s: hobjid.addr=",FUNC);
H5F_addr_print(stdout,&hobjid.addr);
printf(", hobjid.idx=%d\n", hobjid.idx);
if((buf=H5HG_read(ent.file,&hobjid,NULL))==NULL)
HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL,
"Unable to read dataset region information");
/* Get the object oid for the dataset */
p=(uint8_t *)buf;
H5F_addr_decode(ent.file,(const uint8_t **)&p,&(ent.header));
/* Free the buffer allocated in H5HG_read() */
H5MM_xfree(buf);
break;
} /* end case */
case H5R_INTERNAL:
HRETURN_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL,
"Internal references are not yet supported");
case H5R_BADTYPE:
case H5R_MAXTYPE:
default:
assert("unknown reference type" && 0);
HRETURN_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL,
"internal error (unknown reference type)");
} /* end switch */
/* Open the dataset object */
if ((dataset=H5D_open_oid(&ent)) == NULL) {
HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, FAIL, "not found");
}
/* Create an atom for the dataset */
if ((ret_value = H5I_register(H5I_DATASET, dataset)) < 0) {
H5D_close(dataset);
HRETURN_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL,
"can't register dataset");
}
done:
FUNC_LEAVE(ret_value);
} /* end H5R_dereference() */
/*--------------------------------------------------------------------------
NAME
H5Rdereference
PURPOSE
Opens the HDF5 object referenced.
USAGE
hid_t H5Rdereference(ref)
hid_t dataset; IN: Dataset reference object is in.
H5R_type_t ref_type; IN: Type of reference to create
void *ref; IN: Reference to open.
RETURNS
Valid ID on success, Negative on failure
DESCRIPTION
Given a reference to some object, open that object and return an ID for
that object.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
hid_t
H5Rdereference(hid_t dataset, H5R_type_t ref_type, void *_ref)
{
H5D_t *dset = NULL; /* dataset object */
hid_t ret_value = FAIL;
FUNC_ENTER(H5Rdereference, FAIL);
H5TRACE3("i","iRtx",dataset,ref_type,_ref);
/* Check args */
if (H5I_DATASET != H5I_get_type(dataset) || NULL == (dset = H5I_object(dataset)))
HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset");
if(ref_type<=H5R_BADTYPE || ref_type>=H5R_MAXTYPE)
HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type");
if(_ref==NULL)
HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer");
/* Create reference */
if ((ret_value=H5R_dereference(dset, ref_type, _ref))<0)
HGOTO_ERROR (H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable dereference object");
done:
FUNC_LEAVE(ret_value);
} /* end H5Rdereference() */
/*--------------------------------------------------------------------------
NAME
H5R_get_region
PURPOSE
Retrieves a dataspace with the region pointed to selected.
USAGE
H5S_t *H5R_get_region(ref)
void *ref; IN: Reference to open.
RETURNS
Pointer to the dataspace on success, NULL on failure
DESCRIPTION
Given a reference to some object, creates a copy of the dataset pointed
to's dataspace and defines a selection in the copy which is the region
pointed to.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
static H5S_t *
H5R_get_region(H5D_t *dset, H5R_type_t ref_type, void *_ref)
{
H5D_t *dataset; /* Pointer to dataset to open */
H5G_entry_t ent; /* Symbol table entry */
uint8_t *p; /* Pointer to OID to store */
hdset_reg_ref_t *ref=(hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
H5HG_t hobjid; /* Heap object ID */
uint8_t *buf; /* Buffer to store serialized selection in */
H5S_t *ret_value = NULL;
FUNC_ENTER(H5R_get_region, NULL);
assert(_ref);
assert(ref_type==H5R_DATASET_REGION);
assert(dset);
/* Initialize the symbol table entry */
HDmemset(&ent,0,sizeof(H5G_entry_t));
ent.type=H5G_NOTHING_CACHED;
ent.file=H5D_get_file(dset);
/* Get the heap ID for the dataset region */
p=(uint8_t *)ref->heapid;
H5F_addr_decode(ent.file,(const uint8_t **)&p,&(hobjid.addr));
INT32DECODE(p,hobjid.idx);
/* Get the dataset region from the heap (allocate inside routine) */
if((buf=H5HG_read(ent.file,&hobjid,NULL))==NULL)
HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL,
"Unable to read dataset region information");
/* Get the object oid for the dataset */
p=(uint8_t *)buf;
H5F_addr_decode(ent.file,(const uint8_t **)&p,&(ent.header));
/* Open the dataset object */
if ((dataset=H5D_open_oid(&ent)) == NULL) {
HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, NULL, "not found");
}
/* Copy the dataspace object */
if ((ret_value=H5D_get_space(dataset)) == NULL) {
HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found");
}
/* Unserialize the selection */
/* Free the buffer allocated in H5HG_read() */
H5MM_xfree(buf);
/* Close the dataset we opened */
done:
FUNC_LEAVE(ret_value);
} /* end H5R_get_region() */
/*--------------------------------------------------------------------------
NAME
H5Rget_region
PURPOSE
Retrieves a dataspace with the region pointed to selected.
USAGE
hid_t H5Rget_region(ref)
void *ref; IN: Reference to open.
RETURNS
Valid ID on success, Negative on failure
DESCRIPTION
Given a reference to some object, creates a copy of the dataset pointed
to's dataspace and defines a selection in the copy which is the region
pointed to.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
hid_t
H5Rget_region(hid_t dataset, H5R_type_t ref_type, void *_ref)
{
H5D_t *dset = NULL; /* dataset object */
H5S_t *space = NULL; /* dataspace object */
hid_t ret_value = FAIL;
FUNC_ENTER(H5Rget_region, FAIL);
H5TRACE3("i","iRtx",dataset,ref_type,_ref);
/* Check args */
if (H5I_DATASET != H5I_get_type(dataset) || NULL == (dset = H5I_object(dataset)))
HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset");
if(ref_type!=H5R_DATASET_REGION)
HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type");
if(_ref==NULL)
HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer");
/* Get the dataspace with the correct region selected */
if ((space=H5R_get_region(dset,ref_type,_ref))==NULL)
HGOTO_ERROR (H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to create dataspace");
/* Atomize */
if ((ret_value=H5I_register (H5I_DATASPACE, space))<0)
HGOTO_ERROR (H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom");
done:
FUNC_LEAVE(ret_value);
} /* end H5Rget_region() */