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Fix problems with vlens and refs inside compound using H5VLget_file_type() (#274)

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* Fixed problems with vlens and refs inside compound using H5VLget_file_type()

* Fix date in RELEASE.txt

* Add assertions

* Move some manipulation of H5VL_object_t struct fields into the H5VL
package.
This commit is contained in:
Neil Fortner 2021-01-22 15:05:39 -06:00 committed by GitHub
parent 672892cc0e
commit a8ee85971b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
13 changed files with 151 additions and 36 deletions
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9
release_docs/RELEASE.txt
View File

@ -669,6 +669,15 @@ Bug Fixes since HDF5-1.12.0 release
==================================
Library
-------
- Fixed problems with vlens and refs inside compound using
H5VLget_file_type()
Modified library to properly ref count H5VL_object_t structs and only
consider file vlen and reference types to be equal if their files are
the same.
(NAF - 2021/01/22)
- Creation of dataset with optional filter
When the combination of type, space, etc doesn't work for filter

4
src/H5Odtype.c
View File

@ -579,8 +579,10 @@ H5O__dtype_decode_helper(unsigned *ioflags /*in,out*/, const uint8_t **pp, H5T_t
done:
if (ret_value < 0)
if (dt != NULL) {
if (dt->shared != NULL)
if (dt->shared != NULL) {
HDassert(!dt->shared->owned_vol_obj);
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
} /* end if */
dt = H5FL_FREE(H5T_t, dt);
} /* end if */

63
src/H5T.c
View File

@ -1479,6 +1479,8 @@ done:
if (copied_dtype)
(void)H5T_close_real(dt);
else {
if (dt->shared->owned_vol_obj && H5VL_free_object(dt->shared->owned_vol_obj) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "unable to close owned VOL object")
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
dt = H5FL_FREE(H5T_t, dt);
} /* end else */
@ -3447,6 +3449,8 @@ H5T__create(H5T_class_t type, size_t size)
done:
if (NULL == ret_value) {
if (dt) {
if (dt->shared->owned_vol_obj && H5VL_free_object(dt->shared->owned_vol_obj) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close owned VOL object")
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
dt = H5FL_FREE(H5T_t, dt);
}
@ -3489,9 +3493,12 @@ H5T__initiate_copy(const H5T_t *old_dt)
/* Copy shared information */
*(new_dt->shared) = *(old_dt->shared);
/* Reset VOL fields */
/* Increment ref count on owned VOL object */
if (new_dt->shared->owned_vol_obj)
(void)H5VL_object_inc_rc(new_dt->shared->owned_vol_obj);
/* Reset vol_obj field */
new_dt->vol_obj = NULL;
new_dt->shared->owned_vol_obj = NULL;
/* Set return value */
ret_value = new_dt;
@ -3499,8 +3506,11 @@ H5T__initiate_copy(const H5T_t *old_dt)
done:
if (ret_value == NULL)
if (new_dt) {
if (new_dt->shared)
if (new_dt->shared) {
if (new_dt->shared->owned_vol_obj && H5VL_free_object(new_dt->shared->owned_vol_obj) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close owned VOL object")
new_dt->shared = H5FL_FREE(H5T_shared_t, new_dt->shared);
} /* end if */
new_dt = H5FL_FREE(H5T_t, new_dt);
} /* end if */
@ -3829,6 +3839,8 @@ done:
if (ret_value == NULL)
if (new_dt) {
HDassert(new_dt->shared);
if (new_dt->shared->owned_vol_obj && H5VL_free_object(new_dt->shared->owned_vol_obj) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close owned VOL object")
new_dt->shared = H5FL_FREE(H5T_shared_t, new_dt->shared);
new_dt = H5FL_FREE(H5T_t, new_dt);
} /* end if */
@ -3896,6 +3908,8 @@ H5T_copy_reopen(H5T_t *old_dt)
/* The object is already open. Free the H5T_shared_t struct
* we had been using and use the one that already exists.
* Not terribly efficient. */
if (new_dt->shared->owned_vol_obj && H5VL_free_object(new_dt->shared->owned_vol_obj) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close owned VOL object")
new_dt->shared = H5FL_FREE(H5T_shared_t, new_dt->shared);
new_dt->shared = reopened_fo;
@ -3932,6 +3946,8 @@ done:
if (ret_value == NULL)
if (new_dt) {
HDassert(new_dt->shared);
if (new_dt->shared->owned_vol_obj && H5VL_free_object(new_dt->shared->owned_vol_obj) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close owned VOL object")
new_dt->shared = H5FL_FREE(H5T_shared_t, new_dt->shared);
new_dt = H5FL_FREE(H5T_t, new_dt);
} /* end if */
@ -4026,8 +4042,10 @@ H5T__alloc(void)
done:
if (ret_value == NULL)
if (dt) {
if (dt->shared)
if (dt->shared) {
HDassert(!dt->shared->owned_vol_obj);
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
} /* end if */
dt = H5FL_FREE(H5T_t, dt);
} /* end if */
@ -4148,6 +4166,7 @@ H5T_close_real(H5T_t *dt)
if (H5T__free(dt) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTFREE, FAIL, "unable to free datatype");
HDassert(!dt->shared->owned_vol_obj);
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
} /* end if */
else
@ -4282,6 +4301,7 @@ H5T__set_size(H5T_t *dt, size_t size)
/* Check args */
HDassert(dt);
HDassert(dt->shared);
HDassert(size != 0);
HDassert(H5T_REFERENCE != dt->shared->type);
HDassert(!(H5T_ENUM == dt->shared->type && 0 == dt->shared->u.enumer.nmembs));
@ -4469,10 +4489,37 @@ H5T_get_size(const H5T_t *dt)
/* check args */
HDassert(dt);
HDassert(dt->shared);
FUNC_LEAVE_NOAPI(dt->shared->size)
} /* end H5T_get_size() */
/*-------------------------------------------------------------------------
* Function: H5T_get_force_conv
*
* Purpose: Determines if the type has forced conversion. This will be
* true if and only if the type keeps a pointer to a file VOL
* object internally.
*
* Return: TRUE/FALSE (never fails)
*
* Programmer: Neil Fortner
* Thursday, January 21, 2021
*-------------------------------------------------------------------------
*/
hbool_t
H5T_get_force_conv(const H5T_t *dt)
{
/* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* check args */
HDassert(dt);
HDassert(dt->shared);
FUNC_LEAVE_NOAPI(dt->shared->force_conv)
} /* end H5T_get_force_conv() */
/*-------------------------------------------------------------------------
* Function: H5T_cmp
*
@ -4509,6 +4556,9 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
if (dt1 == dt2)
HGOTO_DONE(0);
HDassert(dt1->shared);
HDassert(dt2->shared);
/* compare */
if (dt1->shared->type < dt2->shared->type)
HGOTO_DONE(-1);
@ -4914,6 +4964,10 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
HGOTO_DONE(-1);
if (dt1->shared->u.atomic.u.r.loc > dt2->shared->u.atomic.u.r.loc)
HGOTO_DONE(1);
if (dt1->shared->u.atomic.u.r.file < dt2->shared->u.atomic.u.r.file)
HGOTO_DONE(-1);
if (dt1->shared->u.atomic.u.r.file > dt2->shared->u.atomic.u.r.file)
HGOTO_DONE(1);
break;
case H5T_NO_CLASS:
@ -6295,6 +6349,7 @@ H5T_own_vol_obj(H5T_t *dt, H5VL_object_t *vol_obj)
/* Take ownership */
dt->shared->owned_vol_obj = vol_obj;
(void)H5VL_object_inc_rc(vol_obj);
done:
FUNC_LEAVE_NOAPI(ret_value)

19
src/H5Tcommit.c
View File

@ -143,11 +143,8 @@ H5T__commit_api_common(hid_t loc_id, const char *name, hid_t type_id, hid_t lcpl
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
/* Set up VOL object */
if (NULL == (new_obj = H5FL_CALLOC(H5VL_object_t)))
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't allocate top object structure")
new_obj->connector = (*vol_obj_ptr)->connector;
new_obj->connector->nrefs++;
new_obj->data = data;
if (NULL == (new_obj = H5VL_create_object(data, (*vol_obj_ptr)->connector)))
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't create VOL object for committed datatype")
/* Set the committed type object to the VOL connector pointer in the H5T_t struct */
dt->vol_obj = new_obj;
@ -370,11 +367,8 @@ H5Tcommit_anon(hid_t loc_id, hid_t type_id, hid_t tcpl_id, hid_t tapl_id)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
/* Setup VOL object */
if (NULL == (new_obj = H5FL_CALLOC(H5VL_object_t)))
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't allocate top object structure")
new_obj->connector = vol_obj->connector;
new_obj->connector->nrefs++;
new_obj->data = dt;
if (NULL == (new_obj = H5VL_create_object(dt, vol_obj->connector)))
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't create VOL object for committed datatype")
/* Set the committed type object to the VOL connector pointer in the H5T_t struct */
type->vol_obj = new_obj;
@ -1114,8 +1108,11 @@ H5T_open(const H5G_loc_t *loc)
done:
if (ret_value == NULL) {
if (dt) {
if (shared_fo == NULL) /* Need to free shared fo */
if (shared_fo == NULL) { /* Need to free shared fo */
if (dt->shared->owned_vol_obj && H5VL_free_object(dt->shared->owned_vol_obj) < 0)
HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close owned VOL object")
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
} /* end if */
H5O_loc_free(&(dt->oloc));
H5G_name_free(&(dt->path));

2
src/H5Tconv.c
View File

@ -2010,7 +2010,7 @@ H5T__conv_struct_init(H5T_t *src, H5T_t *dst, H5T_cdata_t *cdata)
priv->subset_info.copy_size = 0;
/*
* Insure that members are sorted.
* Ensure that members are sorted.
*/
H5T__sort_value(src, NULL);
H5T__sort_value(dst, NULL);

7
src/H5Tdeprec.c
View File

@ -134,11 +134,8 @@ H5Tcommit1(hid_t loc_id, const char *name, hid_t type_id)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
/* Set up VOL object */
if (NULL == (new_obj = H5FL_CALLOC(H5VL_object_t)))
HGOTO_ERROR(H5E_DATATYPE, H5E_NOSPACE, FAIL, "can't allocate top object structure")
new_obj->connector = vol_obj->connector;
new_obj->connector->nrefs++;
new_obj->data = data;
if (NULL == (new_obj = H5VL_create_object(data, vol_obj->connector)))
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't create VOL object for committed datatype")
/* Set the committed type object to the VOL connector pointer in the H5T_t struct */
dt->vol_obj = new_obj;

4
src/H5Tpkg.h
View File

@ -860,7 +860,7 @@ H5_DLL void H5T__bit_neg(uint8_t *buf, size_t start, size_t size);
/* VL functions */
H5_DLL H5T_t *H5T__vlen_create(const H5T_t *base);
H5_DLL herr_t H5T__vlen_reclaim(void *elem, const H5T_t *dt, H5T_vlen_alloc_info_t *alloc_info);
H5_DLL htri_t H5T__vlen_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc);
H5_DLL htri_t H5T__vlen_set_loc(H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc);
/* Array functions */
H5_DLL H5T_t *H5T__array_create(H5T_t *base, unsigned ndims, const hsize_t dim[/* ndims */]);
@ -869,7 +869,7 @@ H5_DLL int H5T__get_array_dims(const H5T_t *dt, hsize_t dims[]);
/* Reference functions */
H5_DLL herr_t H5T__ref_reclaim(void *elem, const H5T_t *dt);
H5_DLL htri_t H5T__ref_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc);
H5_DLL htri_t H5T__ref_set_loc(H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc);
/* Compound functions */
H5_DLL herr_t H5T__insert(H5T_t *parent, const char *name, size_t offset, const H5T_t *member);

3
src/H5Tprivate.h
View File

@ -41,11 +41,13 @@ typedef struct H5T_t H5T_t;
#define H5T_GET_SHARED(T) ((T)->shared)
#define H5T_GET_MEMBER_OFFSET(T, I) ((T)->u.compnd.memb[I].offset)
#define H5T_GET_MEMBER_SIZE(T, I) ((T)->u.compnd.memb[I].shared->size)
#define H5T_GET_FORCE_CONV(T) ((T)>shared->force_conv)
#else /* H5T_MODULE */
#define H5T_GET_SIZE(T) (H5T_get_size(T))
#define H5T_GET_SHARED(T) (H5T_get_shared(T))
#define H5T_GET_MEMBER_OFFSET(T, I) (H5T_get_member_offset((T), (I)))
#define H5T_GET_MEMBER_SIZE(T, I) (H5T_get_member_size((T), (I)))
#define H5T_GET_FORCE_CONV(T) (H5T_get_force_conv(T))
#endif /* H5T_MODULE */
/* Forward references of package typedefs (declared in H5Tpkg.h) */
@ -114,6 +116,7 @@ H5_DLL H5T_t * H5T_get_super(const H5T_t *dt);
H5_DLL H5T_class_t H5T_get_class(const H5T_t *dt, htri_t internal);
H5_DLL htri_t H5T_detect_class(const H5T_t *dt, H5T_class_t cls, hbool_t from_api);
H5_DLL size_t H5T_get_size(const H5T_t *dt);
H5_DLL hbool_t H5T_get_force_conv(const H5T_t *dt);
H5_DLL int H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset);
H5_DLL herr_t H5T_encode(H5T_t *obj, unsigned char *buf, size_t *nalloc);
H5_DLL H5T_t * H5T_decode(size_t buf_size, const unsigned char *buf);

13
src/H5Tref.c
View File

@ -156,7 +156,7 @@ static const H5T_ref_class_t H5T_ref_dsetreg_disk_g = {
*-------------------------------------------------------------------------
*/
htri_t
H5T__ref_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
H5T__ref_set_loc(H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
{
htri_t ret_value = FALSE; /* Indicate success, but no location change */
@ -180,6 +180,13 @@ H5T__ref_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
/* Mark this type as being stored in memory */
dt->shared->u.atomic.u.r.loc = H5T_LOC_MEMORY;
/* Release owned file */
if (dt->shared->owned_vol_obj) {
if(H5VL_free_object(dt->shared->owned_vol_obj) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCLOSEOBJ, FAIL, "unable to close owned VOL object")
dt->shared->owned_vol_obj = NULL;
} /* end if */
/* Reset file ID (since this reference is in memory) */
dt->shared->u.atomic.u.r.file = file; /* file is NULL */
@ -220,6 +227,10 @@ H5T__ref_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
/* Set file pointer (since this reference is on disk) */
dt->shared->u.atomic.u.r.file = file;
/* dt now owns a reference to file */
if (H5T_own_vol_obj(dt, file) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "can't give ownership of VOL object")
if (dt->shared->u.atomic.u.r.rtype == H5R_OBJECT1) {
H5F_t *f;

13
src/H5Tvlen.c
View File

@ -245,7 +245,7 @@ done:
*-------------------------------------------------------------------------
*/
htri_t
H5T__vlen_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
H5T__vlen_set_loc(H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
{
H5VL_file_cont_info_t cont_info = {H5VL_CONTAINER_INFO_VERSION, 0, 0, 0};
htri_t ret_value = FALSE; /* Indicate success, but no location change */
@ -282,6 +282,13 @@ H5T__vlen_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
else
HDassert(0 && "Invalid VL type");
/* Release owned file */
if (dt->shared->owned_vol_obj) {
if(H5VL_free_object(dt->shared->owned_vol_obj) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "unable to close owned VOL object")
dt->shared->owned_vol_obj = NULL;
} /* end if */
/* Reset file pointer (since this VL is in memory) */
dt->shared->u.vlen.file = NULL;
break;
@ -307,6 +314,10 @@ H5T__vlen_set_loc(const H5T_t *dt, H5VL_object_t *file, H5T_loc_t loc)
/* Set file ID (since this VL is on disk) */
dt->shared->u.vlen.file = file;
/* dt now owns a reference to file */
if (H5T_own_vol_obj(dt, file) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "can't give ownership of VOL object")
break;
case H5T_LOC_BADLOC:

15
src/H5VL.c
View File

@ -683,8 +683,9 @@ H5VLget_file_type(void *file_obj, hid_t connector_id, hid_t dtype_id)
if (NULL == (dtype = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
/* Create VOL object for file */
if (NULL == (file_vol_obj = H5VL_create_object_using_vol_id(H5I_FILE, file_obj, connector_id)))
/* Create VOL object for file if necessary (force_conv will be TRUE if and
* only if file needs to be passed to H5T_set_loc) */
if (H5T_GET_FORCE_CONV(dtype) && (NULL == (file_vol_obj = H5VL_create_object_using_vol_id(H5I_FILE, file_obj, connector_id))))
HGOTO_ERROR(H5E_VOL, H5E_CANTCREATE, FAIL, "can't create VOL object")
/* Copy the datatype */
@ -701,10 +702,12 @@ H5VLget_file_type(void *file_obj, hid_t connector_id, hid_t dtype_id)
if (H5T_set_loc(file_type, file_vol_obj, H5T_LOC_DISK) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTINIT, FAIL, "can't set datatype location")
/* file_type now owns file_vol_obj */
if (H5T_own_vol_obj(file_type, file_vol_obj) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTINIT, FAIL, "can't give ownership of VOL object")
file_vol_obj = NULL;
/* Release our reference to file_type */
if (file_vol_obj) {
if (H5VL_free_object(file_vol_obj) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to free VOL object")
file_vol_obj = NULL;
} /* end if */
/* Set return value */
ret_value = file_type_id;

33
src/H5VLint.c
View File

@ -568,6 +568,7 @@ H5VL__new_vol_obj(H5I_type_t type, void *object, H5VL_t *vol_connector, hbool_t
} /* end if */
else
new_vol_obj->data = object;
new_vol_obj->rc = 1;
/* Bump the reference count on the VOL connector */
H5VL_conn_inc_rc(vol_connector);
@ -844,6 +845,7 @@ H5VL_create_object(void *object, H5VL_t *vol_connector)
HGOTO_ERROR(H5E_VOL, H5E_CANTALLOC, NULL, "can't allocate memory for VOL object")
ret_value->connector = vol_connector;
ret_value->data = object;
ret_value->rc = 1;
/* Bump the reference count on the VOL connector */
H5VL_conn_inc_rc(vol_connector);
@ -980,6 +982,27 @@ done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5VL_conn_dec_rc() */
/*-------------------------------------------------------------------------
* Function: H5VL_object_inc_rc
*
* Purpose: Wrapper to increment the ref count on a VOL object.
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
hsize_t
H5VL_object_inc_rc(H5VL_object_t *vol_obj)
{
FUNC_ENTER_NOAPI_NOERR_NOFS
/* Check arguments */
HDassert(vol_obj);
/* Increment refcount for object and return */
FUNC_LEAVE_NOAPI(++vol_obj->rc)
} /* end H5VL_object_inc_rc() */
/*-------------------------------------------------------------------------
* Function: H5VL_free_object
*
@ -1000,11 +1023,13 @@ H5VL_free_object(H5VL_object_t *vol_obj)
/* Check arguments */
HDassert(vol_obj);
/* Decrement refcount on connector */
if (H5VL_conn_dec_rc(vol_obj->connector) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to decrement ref count on VOL connector")
if(--vol_obj->rc == 0) {
/* Decrement refcount on connector */
if (H5VL_conn_dec_rc(vol_obj->connector) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to decrement ref count on VOL connector")
vol_obj = H5FL_FREE(H5VL_object_t, vol_obj);
vol_obj = H5FL_FREE(H5VL_object_t, vol_obj);
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)

2
src/H5VLprivate.h
View File

@ -37,6 +37,7 @@ typedef struct H5VL_t {
typedef struct H5VL_object_t {
void * data; /* Pointer to connector-managed data for this object */
H5VL_t *connector; /* Pointer to VOL connector struct */
size_t rc; /* Reference count */
} H5VL_object_t;
/* Internal structure to hold the connector ID & info for FAPLs */
@ -90,6 +91,7 @@ H5_DLL void *H5VL_object_verify(hid_t id, H5I_type_t obj_type);
H5_DLL H5VL_object_t *H5VL_vol_object(hid_t id);
H5_DLL H5VL_object_t *H5VL_create_object(void *object, H5VL_t *vol_connector);
H5_DLL H5VL_object_t *H5VL_create_object_using_vol_id(H5I_type_t type, void *obj, hid_t connector_id);
H5_DLL hsize_t H5VL_object_inc_rc(H5VL_object_t *obj);
H5_DLL herr_t H5VL_free_object(H5VL_object_t *obj);
H5_DLL herr_t H5VL_object_is_native(const H5VL_object_t *obj, hbool_t *is_native);
H5_DLL herr_t H5VL_file_is_same(const H5VL_object_t *vol_obj1, const H5VL_object_t *vol_obj2,