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| -rw-r--r-- | release_docs/RELEASE.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index 1ad27dd..8b25de0 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -247,6 +247,50 @@ New Features Library: -------- + - Refactored public exposure of haddr_t type in favor of "object tokens" + + To better accommodate HDF5 VOL connectors where "object addresses in a file" + may not make much sense, the following changes were made to the library: + + * Introduced new H5O_token_t "object token" type, which represents a + unique and permanent identifier for referencing an HDF5 object within + a container; these "object tokens" are meant to replace object addresses. + Along with the new type, a new H5Oopen_by_token API call was introduced + to open an object by a token, similar to how object addresses were + previously used with H5Oopen_by_addr. + + * Introduced new H5Lget_info2, H5Lget_info_by_idx2, H5Literate2, H5Literate_by_name2, + H5Lvisit2 and H5Lvisit_by_name2 API calls, along with their associated H5L_info2_t + struct and H5L_iterate2_t callback function, which work with the newly-introduced + object tokens, instead of object addresses. The original functions have been + renamed to version 1 functions and are deprecated in favor of the new version 2 + functions. The H5L_info_t and H5L_iterate_t types have been renamed to version 1 + types and are now deprecated in favor of their version 2 counterparts. For each of + the functions and types, compatibility macros take place of the original symbols. + + * Introduced new H5Oget_info3, H5Oget_info_by_name3, H5Oget_info_by_idx3, + H5Ovisit3 and H5Ovisit_by_name3 API calls, along with their associated H5O_info2_t + struct and H5O_iterate2_t callback function, which work with the newly-introduced + object tokens, instead of object addresses. The version 2 functions are now + deprecated in favor of the version 3 functions. The H5O_info_t and H5O_iterate_t + types have been renamed to version 1 types and are now deprecated in favor of their + version 2 counterparts. For each, compatibility macros take place of the original + symbols. + + * Introduced new H5Oget_native_info, H5Oget_native_info_by_name and + H5Oget_native_info_by_idx API calls, along with their associated H5O_native_info_t + struct, which are used to retrieve the native HDF5 file format-specific information + about an object. This information (such as object header info and B-tree/heap info) + has been removed from the new H5O_info2_t struct so that the more generic + H5Oget_info(_by_name/_by_idx)3 routines will not try to retrieve it for non-native + VOL connectors. + + * Added new H5Otoken_cmp, H5Otoken_to_str and H5Otoken_from_str routines to compare + two object tokens, convert an object token into a nicely-readable string format and + to convert an object token string back into a real object token, respectively. + + (DER, QAK, JTH - 2020/01/16) + - Add new public function H5Sselect_adjust. This function shifts a dataspace selection by a specified logical offset |