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[svn-r16436] Checkin for moving messages forward into continuation message:

Browse Source 
src/H5Oalloc.c, test/ohdr.c, toshm.c
Fixed couple of problems in src/H5Odbg.c.
This commit is contained in:
Vailin Choi
2009-02-05 10:29:27 -05:00
parent 3c67d2972c
commit f65a6a6473
4 changed files with 251 additions and 10 deletions
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139
src/H5Oalloc.c
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@@ -68,7 +68,8 @@ static htri_t H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
unsigned chunkno, size_t size, unsigned * msg_idx);
static unsigned H5O_alloc_new_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
size_t size);
static htri_t H5O_move_msgs_forward(H5O_t *oh);
static htri_t H5O_move_cont(H5F_t *f, H5O_t *oh, unsigned cont_u, hid_t dxpl_id);
static htri_t H5O_move_msgs_forward(H5F_t *f, H5O_t *oh, hid_t dxpl_id);
static htri_t H5O_merge_null(H5F_t *f, H5O_t *oh, hid_t dxpl_id);
static htri_t H5O_remove_empty_chunks(H5F_t *f, H5O_t *oh, hid_t dxpl_id);
static herr_t H5O_alloc_shrink_chunk(H5F_t *f, H5O_t *oh, hid_t dxpl_id, unsigned chunkno);
@@ -1089,6 +1090,118 @@ done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5O_release_mesg() */
/*-------------------------------------------------------------------------
* Function: H5O_move_cont
*
* Purpose: Check and move message(s) forward into a continuation message
*
* Return: Success: non-negative (TRUE/FALSE)
* Failure: negative
*
* Programmer: Vailin Choi
* Feb. 2009
*
*-------------------------------------------------------------------------
*/
static htri_t
H5O_move_cont(H5F_t *f, H5O_t *oh, unsigned cont_u, hid_t dxpl_id)
{
unsigned v; /* local index variable */
H5O_mesg_t *cont_msg; /* pointer to the continuation message */
H5O_mesg_t *nonnull_msg; /* pointer to the current message to operate on */
H5O_mesg_t *null_msg; /* pointer to the current message to operate on */
size_t total_size=0; /* total size of nonnull messages in the chunk pointed to by cont message */
size_t move_size=0; /* size of the message to be moved */
uint8_t *move_start, *move_end; /* pointers to area of messages to move */
size_t gap_size; /* size of gap produced */
unsigned deleted_chunkno; /* Chunk # to delete */
htri_t ret_value = FALSE; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5O_move_cont)
/* Check arguments. */
HDassert(f);
HDassert(oh);
cont_msg = &oh->mesg[cont_u];
H5O_LOAD_NATIVE(f, dxpl_id, 0, oh, cont_msg, FAIL)
deleted_chunkno = ((H5O_cont_t *)(cont_msg->native))->chunkno;
/* proceed further only if continuation message is pointing to the last chunk */
if(deleted_chunkno != (oh->nchunks - 1))
HGOTO_DONE(FALSE)
/* find size of all nonnull messages in the chunk pointed to by the continuation message */
for(v = 0, nonnull_msg = &oh->mesg[0]; v < oh->nmesgs; v++, nonnull_msg++)
if(nonnull_msg->chunkno == deleted_chunkno && nonnull_msg->type->id != H5O_NULL_ID) {
HDassert(nonnull_msg->type->id != H5O_CONT_ID);
total_size += nonnull_msg->raw_size + H5O_SIZEOF_MSGHDR_OH(oh);
}
/* check if messages can fit into the continuation message */
if(total_size && total_size <= (cont_msg->raw_size + H5O_SIZEOF_MSGHDR_OH(oh))) {
/* convert continuation message into a null message */
if(H5O_release_mesg(f, dxpl_id, oh, cont_msg, TRUE) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to convert into null message")
move_start = cont_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh);
move_end = cont_msg->raw + cont_msg->raw_size;
/* move message(s) forward into continuation message */
for(v = 0, nonnull_msg = &oh->mesg[0]; v < oh->nmesgs; v++, nonnull_msg++)
if(nonnull_msg->chunkno == deleted_chunkno && nonnull_msg->type->id != H5O_NULL_ID) {
move_size = nonnull_msg->raw_size + H5O_SIZEOF_MSGHDR_OH(oh);
HDmemcpy(move_start, nonnull_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), move_size);
nonnull_msg->raw = move_start + H5O_SIZEOF_MSGHDR_OH(oh);
nonnull_msg->chunkno = cont_msg->chunkno;
nonnull_msg->dirty = TRUE;
move_start += move_size;
}
HDassert(move_start <= move_end);
/* check if there is space remaining in the continuation message */
/* the remaining space can be gap or a null message */
gap_size = move_end - move_start;
if(gap_size >= (size_t)H5O_SIZEOF_MSGHDR_OH(oh)) {
cont_msg->raw_size = gap_size - H5O_SIZEOF_MSGHDR_OH(oh);
cont_msg->raw = move_start + H5O_SIZEOF_MSGHDR_OH(oh);
cont_msg->dirty = TRUE;
} else {
if(gap_size && (H5O_add_gap(oh, cont_msg->chunkno, cont_u, move_start, gap_size) < 0))
HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't insert gap in chunk")
/* Release any information/memory for continuation message */
H5O_msg_free_mesg(cont_msg);
if(cont_u < (oh->nmesgs - 1))
HDmemmove(&oh->mesg[cont_u], &oh->mesg[cont_u + 1], ((oh->nmesgs - 1) - cont_u) * sizeof(H5O_mesg_t));
oh->nmesgs--;
}
/* remove all null messages in deleted chunk from list of messages */
/* Note: unsigned v wrapping around at the end */
for (v = oh->nmesgs - 1, null_msg = &oh->mesg[v]; v < oh->nmesgs; v--, null_msg--)
if(null_msg->type->id == H5O_NULL_ID && null_msg->chunkno == deleted_chunkno) {
/* Release any information/memory for message */
H5O_msg_free_mesg(null_msg);
if(v < (oh->nmesgs - 1))
HDmemmove(&oh->mesg[v], &oh->mesg[v + 1], ((oh->nmesgs - 1) - v) * sizeof(H5O_mesg_t));
oh->nmesgs--;
} /* end if */
(void)H5FL_BLK_FREE(chunk_image, oh->chunk[deleted_chunkno].image);
oh->nchunks--;
ret_value = TRUE;
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5O_move_cont() */
/*-------------------------------------------------------------------------
*
@@ -1101,11 +1214,14 @@ done:
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Oct 17 2005
* Modifications:
* Feb. 2009: Vailin Choi
* Add changes to move messages forward into "continuation" message
*
*-------------------------------------------------------------------------
*/
static htri_t
H5O_move_msgs_forward(H5O_t *oh)
H5O_move_msgs_forward(H5F_t *f, H5O_t *oh, hid_t dxpl_id)
{
hbool_t packed_msg; /* Flag to indicate that messages were packed */
hbool_t did_packing = FALSE; /* Whether any messages were packed */
@@ -1182,7 +1298,17 @@ H5O_move_msgs_forward(H5O_t *oh)
} /* end if */
else {
H5O_mesg_t *null_msg; /* Pointer to current message to operate on */
unsigned v; /* Local index variable */
unsigned v; /* Local index variable */
htri_t status;
if(H5O_CONT_ID == curr_msg->type->id) {
if((status = H5O_move_cont(f, oh, u, dxpl_id)) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "Error in moving messages into cont message")
else if(status > 0) { /* message(s) got moved into "continuation" message */
packed_msg = TRUE;
break;
}
}
/* Loop over messages again, looking for large enough null message in earlier chunk */
for(v = 0, null_msg = &oh->mesg[0]; v < oh->nmesgs; v++, null_msg++) {
@@ -1583,6 +1709,11 @@ done:
* koziol@ncsa.uiuc.edu
* Oct 4 2005
*
* Modifications:
* Feb. 2009: Vailin Choi
* Add 2 more parameters to H5O_move_msgs_forward() for moving
* messages forward into "continuation" message
*
*-------------------------------------------------------------------------
*/
herr_t
@@ -1603,7 +1734,7 @@ H5O_condense_header(H5F_t *f, H5O_t *oh, hid_t dxpl_id)
rescan_header = FALSE;
/* Scan for messages that can be moved earlier in chunks */
result = H5O_move_msgs_forward(oh);
result = H5O_move_msgs_forward(f, oh, dxpl_id);
if(result < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "can't move header messages forward")
if(result > 0)