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-rw-r--r--src/H5Ddeprec.c50
1 files changed, 47 insertions, 3 deletions
diff --git a/src/H5Ddeprec.c b/src/H5Ddeprec.c
index b3dae7b..3da6b95 100644
--- a/src/H5Ddeprec.c
+++ b/src/H5Ddeprec.c
@@ -382,12 +382,56 @@ H5D__extend(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id)
/* Update the index values for the cached chunks for this dataset */
if(H5D_CHUNKED == dataset->shared->layout.type) {
+ hbool_t update_chunks = FALSE; /* Flag to indicate chunk cache update is needed */
+
+ /* Check if we need to track & update scaled dimension information */
+ if(dataset->shared->ndims > 1) {
+ unsigned u; /* Local indicate variable */
+
+ /* Update scaled chunk information */
+ for(u = 0; u < dataset->shared->ndims; u++) {
+ hsize_t scaled; /* Scaled value */
+
+ /* Compute the scaled dimension size value */
+ scaled = size[u] / dataset->shared->layout.u.chunk.dim[u];
+
+ /* Check if scaled dimension size changed */
+ if(scaled != dataset->shared->cache.chunk.scaled_dims[u]) {
+ hsize_t scaled_power2up; /* New size value, rounded to next power of 2 */
+
+ /* Update the scaled dimension size value for the current dimension */
+ dataset->shared->cache.chunk.scaled_dims[u] = scaled;
+
+ /* Check if algorithm for computing hash values will change */
+ if((scaled > dataset->shared->cache.chunk.nslots &&
+ dataset->shared->cache.chunk.scaled_dims[u] <= dataset->shared->cache.chunk.nslots)
+ || (scaled <= dataset->shared->cache.chunk.nslots &&
+ dataset->shared->cache.chunk.scaled_dims[u] > dataset->shared->cache.chunk.nslots))
+ update_chunks = TRUE;
+
+ /* Check if the number of bits required to encode the scaled size value changed */
+ if(dataset->shared->cache.chunk.scaled_power2up[u] != (scaled_power2up = H5VM_power2up(scaled))) {
+ /* Update the 'power2up' & 'encode_bits' values for the current dimension */
+ dataset->shared->cache.chunk.scaled_power2up[u] = scaled_power2up;
+ dataset->shared->cache.chunk.scaled_encode_bits[u] = H5VM_log2_gen(scaled_power2up);
+
+ /* Indicate that the chunk cache indices should be updated */
+ update_chunks = TRUE;
+ } /* end if */
+ } /* end if */
+ } /* end for */
+ } /* end if */
+
/* Update general information for chunks */
if(H5D__chunk_set_info(dataset) < 0)
HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to update # of chunks")
- /* Update the chunk cache indices */
- if(H5D__chunk_update_cache(dataset, dxpl_id) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update cached chunk indices")
+
+ /* Check for updating chunk cache indices */
+ if(update_chunks) {
+ /* Update the chunk cache indices */
+ if(H5D__chunk_update_cache(dataset, dxpl_id) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update cached chunk indices")
+ } /* end if */
} /* end if */
/* Allocate space for the new parts of the dataset, if appropriate */