diff options
Diffstat (limited to 'src/H5O.c')
| -rw-r--r-- | src/H5O.c | 57 |
1 files changed, 54 insertions, 3 deletions
@@ -1106,14 +1106,15 @@ done: *------------------------------------------------------------------------- */ herr_t -H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, hid_t ocpl_id, - H5O_loc_t *loc/*out*/) +H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, size_t initial_rc, + hid_t ocpl_id, H5O_loc_t *loc/*out*/) { H5P_genplist_t *oc_plist; /* Object creation property list */ H5O_t *oh = NULL; /* Object header created */ haddr_t oh_addr; /* Address of initial object header */ size_t oh_size; /* Size of initial object header */ uint8_t oh_flags; /* Object header's initial status flags */ + unsigned insert_flags = H5AC__NO_FLAGS_SET; /* Flags for inserting object header into cache */ hbool_t store_msg_crt_idx; /* Whether to always store message creation indices for this file */ herr_t ret_value = SUCCEED; /* return value */ @@ -1243,11 +1244,18 @@ H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, hid_t ocpl_id, oh->mesg[0].raw_size = size_hint - (size_t)H5O_SIZEOF_MSGHDR_OH(oh); oh->mesg[0].chunkno = 0; + /* Check for non-zero initial refcount on the object header */ + if(initial_rc > 0) { + /* Set the initial refcount & pin the header when its inserted */ + oh->rc = initial_rc; + insert_flags |= H5AC__PIN_ENTRY_FLAG; + } /* end if */ + /* Set metadata tag in dxpl_id */ H5_BEGIN_TAG(dxpl_id, oh_addr, FAIL); /* Cache object header */ - if(H5AC_insert_entry(f, dxpl_id, H5AC_OHDR, oh_addr, oh, H5AC__NO_FLAGS_SET) < 0) + if(H5AC_insert_entry(f, dxpl_id, H5AC_OHDR, oh_addr, oh, insert_flags) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header") oh = NULL; @@ -3422,6 +3430,49 @@ done: /*------------------------------------------------------------------------- + * Function: H5O_dec_rc_by_loc + * + * Purpose: Decrement the refcount of an object header, using its + * object location information. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * koziol@hdfgroup.org + * Oct 08 2010 + * + *------------------------------------------------------------------------- + */ +herr_t +H5O_dec_rc_by_loc(const H5O_loc_t *loc, hid_t dxpl_id) +{ + H5O_t *oh = NULL; /* Object header */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI(H5O_dec_rc_by_loc, FAIL) + + /* check args */ + HDassert(loc); + + /* Get header */ + if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC_READ))) + HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header") + + /* Decrement the reference count on the object header */ + /* (which will unpin it, if appropriate) */ + if(H5O_dec_rc(oh) < 0) + HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header") + +done: + /* Release the object header from the cache */ + if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0) + HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header") + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5O_dec_rc_by_loc() */ + + +/*------------------------------------------------------------------------- * Function: H5O_free * * Purpose: Destroys an object header. |