diff options
Diffstat (limited to 'src/H5HGprivate.h')
| -rw-r--r-- | src/H5HGprivate.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/H5HGprivate.h b/src/H5HGprivate.h index c6ec1cd..8f66ef7 100644 --- a/src/H5HGprivate.h +++ b/src/H5HGprivate.h @@ -24,6 +24,16 @@ #define H5HG_VERSION 1 /* + * Pad all global heap messages to a multiple of eight bytes so we can load + * the entire collection into memory and operate on it there. Eight should + * be sufficient for machines that have alignment constraints because our + * largest data type is eight bytes. + */ +#define H5HG_ALIGNMENT 8 +#define H5HG_ALIGN(X) (H5HG_ALIGNMENT*(((X)+H5HG_ALIGNMENT-1)/ \ + H5HG_ALIGNMENT)) + +/* * All global heap collections are at least this big. This allows us to read * most collections with a single read() since we don't have to read a few * bytes of header to figure out the size. If the heap is larger than this @@ -53,8 +63,9 @@ /* * The overhead associated with each object in the heap. */ -#define H5HG_SIZEOF_OBJHDR(f) (2 + /*reference count */ \ - 2 + /*reserved */ \ +#define H5HG_SIZEOF_OBJHDR(f) (2 + /*object id number */ \ + 2 + /*reference count */ \ + 4 + /*reserved */ \ H5F_SIZEOF_SIZE(f)) /*object data size */ /* |