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| author | Raymond Lu <songyulu@hdfgroup.org> | 2006-10-18 21:42:32 (GMT) |
|---|---|---|
| committer | Raymond Lu <songyulu@hdfgroup.org> | 2006-10-18 21:42:32 (GMT) |
| commit | 5e4114b908ab64e10cf39346cc8bc2e0a0066dbd (patch) | |
| tree | e6c5fdbe93dca41cf8858ac48c18256ebc648b13 | |
| parent | 4d32eb160bd41628638d9aa2e7239f85b6b28250 (diff) | |
| download | hdf5-5e4114b908ab64e10cf39346cc8bc2e0a0066dbd.zip hdf5-5e4114b908ab64e10cf39346cc8bc2e0a0066dbd.tar.gz hdf5-5e4114b908ab64e10cf39346cc8bc2e0a0066dbd.tar.bz2 | |
[svn-r12777] Added support to aligned file space allocation. The alignment should be set through
H5Pset_alignment.
| -rw-r--r-- | src/H5FDdirect.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/src/H5FDdirect.c b/src/H5FDdirect.c index b3b2b0f..ab4b7de 100644 --- a/src/H5FDdirect.c +++ b/src/H5FDdirect.c @@ -160,6 +160,7 @@ static H5FD_t *H5FD_direct_open(const char *name, unsigned flags, hid_t fapl_id, static herr_t H5FD_direct_close(H5FD_t *_file); static int H5FD_direct_cmp(const H5FD_t *_f1, const H5FD_t *_f2); static herr_t H5FD_direct_query(const H5FD_t *_f1, unsigned long *flags); +static haddr_t H5FD_direct_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size); static haddr_t H5FD_direct_get_eoa(const H5FD_t *_file); static herr_t H5FD_direct_set_eoa(H5FD_t *_file, haddr_t addr); static haddr_t H5FD_direct_get_eof(const H5FD_t *_file); @@ -188,7 +189,7 @@ static const H5FD_class_t H5FD_direct_g = { H5FD_direct_close, /*close */ H5FD_direct_cmp, /*cmp */ H5FD_direct_query, /*query */ - NULL, /*alloc */ + H5FD_direct_alloc, /*alloc */ NULL, /*free */ H5FD_direct_get_eoa, /*get_eoa */ H5FD_direct_set_eoa, /*set_eoa */ @@ -702,6 +703,51 @@ done: /*------------------------------------------------------------------------- + * Function: H5FD_direct_alloc + * + * Purpose: Allocate file aligned space set through H5Pset_alignment. + * + * Return: Success: Address of new space + * + * Failure: HADDR_UNDEF + * + * Programmer: Raymond Lu + * Wednesday, 18 October 2006 + * + * Modifications: + * + *------------------------------------------------------------------------- + */ +static haddr_t +H5FD_direct_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t UNUSED dxpl_id, hsize_t size) +{ + H5FD_direct_t *file = (H5FD_direct_t*)_file; + haddr_t addr; + haddr_t ret_value; /* Return value */ + + FUNC_ENTER_NOAPI(H5FD_direct_alloc, HADDR_UNDEF) + + /* Compute the address for the block to allocate */ + addr = file->eoa; + + /* Check if we need to align this block */ + if(size>=file->pub.threshold) { + /* Check for an already aligned block */ + if(addr%file->pub.alignment!=0) + addr=((addr/file->pub.alignment)+1)*file->pub.alignment; + } /* end if */ + + file->eoa = addr+size; + + /* Set return value */ + ret_value=addr; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* H5FD_direct_alloc() */ + + +/*------------------------------------------------------------------------- * Function: H5FD_direct_get_eoa * * Purpose: Gets the end-of-address marker for the file. The EOA marker |