diff options
Diffstat (limited to 'src/H5Dchunk.c')
| -rw-r--r-- | src/H5Dchunk.c | 59 |
1 files changed, 33 insertions, 26 deletions
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c index 2523c5d..33fc036 100644 --- a/src/H5Dchunk.c +++ b/src/H5Dchunk.c @@ -445,11 +445,17 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters, /* Set up the size of chunk for user data */ udata.chunk_block.length = data_size; - /* Create the chunk it if it doesn't exist, or reallocate the chunk - * if its size changed. - */ - if(H5D__chunk_file_alloc(&idx_info, &old_chunk, &udata.chunk_block, &need_insert, scaled) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate chunk") + if (0 == idx_info.pline->nused && H5F_addr_defined(old_chunk.offset)) { + /* If there are no filters and we are overwriting the chunk we can just set values */ + need_insert = FALSE; + } + else { + /* Otherwise, create the chunk it if it doesn't exist, or reallocate the chunk + * if its size has changed. + */ + if (H5D__chunk_file_alloc(&idx_info, &old_chunk, &udata.chunk_block, &need_insert, scaled) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate chunk") + } /* Make sure the address of the chunk is returned. */ if(!H5F_addr_defined(udata.chunk_block.offset)) @@ -526,6 +532,8 @@ H5D__chunk_direct_read(const H5D_t *dset, hid_t dxpl_id, hsize_t *offset, HDassert(filters); HDassert(buf); + *filters = 0; + io_info.dset = dset; io_info.raw_dxpl_id = dxpl_id; io_info.md_dxpl_id = dxpl_id; @@ -562,32 +570,31 @@ H5D__chunk_direct_read(const H5D_t *dset, hid_t dxpl_id, hsize_t *offset, /* Check if the requested chunk exists in the chunk cache */ if(UINT_MAX != udata.idx_hint) { H5D_rdcc_ent_t *ent = rdcc->slot[udata.idx_hint]; + hbool_t flush; /* Sanity checks */ HDassert(udata.idx_hint < rdcc->nslots); HDassert(rdcc->slot[udata.idx_hint]); - /* If the cached chunk is dirty, it must be flushed to get accurate size */ - if( ent->dirty == TRUE ) { + flush = (ent->dirty == TRUE) ? TRUE : FALSE; - /* Fill the DXPL cache values for later use */ - if(H5D__get_dxpl_cache(io_info.raw_dxpl_id, &dxpl_cache) < 0) + /* Fill the DXPL cache values for later use */ + if(H5D__get_dxpl_cache(io_info.raw_dxpl_id, &dxpl_cache) < 0) HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache") - /* Flush the chunk to disk and clear the cache entry */ - if(H5D__chunk_cache_evict(dset, io_info.md_dxpl_id, dxpl_cache, rdcc->slot[udata.idx_hint], TRUE) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk") + /* Flush the chunk to disk and clear the cache entry */ + if(H5D__chunk_cache_evict(dset, io_info.md_dxpl_id, dxpl_cache, rdcc->slot[udata.idx_hint], flush) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk") - /* Reset fields about the chunk we are looking for */ - udata.filter_mask = 0; - udata.chunk_block.offset = HADDR_UNDEF; - udata.chunk_block.length = 0; - udata.idx_hint = UINT_MAX; + /* Reset fields about the chunk we are looking for */ + udata.filter_mask = 0; + udata.chunk_block.offset = HADDR_UNDEF; + udata.chunk_block.length = 0; + udata.idx_hint = UINT_MAX; - /* Get the new file address / chunk size after flushing */ - if(H5D__chunk_lookup(dset, io_info.md_dxpl_id, scaled, &udata) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address") - } + /* Get the new file address / chunk size after flushing */ + if(H5D__chunk_lookup(dset, io_info.md_dxpl_id, scaled, &udata) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address") } /* Make sure the address of the chunk is returned. */ @@ -642,6 +649,8 @@ H5D__get_chunk_storage_size(H5D_t *dset, hid_t dxpl_id, const hsize_t *offset, h HDassert(offset); HDassert(storage_size); + *storage_size = 0; + io_info.dset = dset; io_info.raw_dxpl_id = dxpl_id; io_info.md_dxpl_id = dxpl_id; @@ -654,10 +663,8 @@ H5D__get_chunk_storage_size(H5D_t *dset, hid_t dxpl_id, const hsize_t *offset, h #endif /* H5_DEBUG_BUILD */ /* Allocate dataspace and initialize it if it hasn't been. */ - if(!(*layout->ops->is_space_alloc)(&layout->storage)) { - *storage_size = 0; + if(!(*layout->ops->is_space_alloc)(&layout->storage)) HGOTO_DONE(SUCCEED) - } /* Calculate the index of this chunk */ H5VM_chunk_scaled(dset->shared->ndims, offset, layout->u.chunk.dim, scaled); @@ -2949,7 +2956,7 @@ H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id, const hsize_t *scaled, /* Check for chunk in cache */ if(dset->shared->cache.chunk.nslots > 0) { /* Determine the chunk's location in the hash table */ - idx = H5D__chunk_hash_val(dset->shared, scaled); + idx = H5D__chunk_hash_val(dset->shared, scaled); /* Get the chunk cache entry for that location */ ent = dset->shared->cache.chunk.slot[idx]; @@ -2973,7 +2980,7 @@ H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id, const hsize_t *scaled, udata->idx_hint = idx; udata->chunk_block.offset = ent->chunk_block.offset; udata->chunk_block.length = ent->chunk_block.length;; - udata->chunk_idx = ent->chunk_idx; + udata->chunk_idx = ent->chunk_idx; } /* end if */ else { /* Invalidate idx_hint, to signal that the chunk is not in cache */ |