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-rw-r--r--release_docs/RELEASE.txt25
1 files changed, 25 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index ed12c5e..6043145 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -471,6 +471,31 @@ New Features
Library:
--------
+ - Adds new "ctl" callback to VFD H5FD_class_t structure
+ with the following prototype:
+
+ herr_t (*ctl)(H5FD_t *file, uint64_t op_code,
+ uint64_t flags, const void *input,
+ void **output);
+
+ This newly-added "ctl" callback allows Virtual File
+ Drivers to intercept and handle arbitary operations
+ identified by an operation code. Its parameters are
+ as follows:
+
+ `file` [in] - A pointer to the file to be operated on
+ `op_code` [in] - The operation code identifying the
+ operation to be performed
+ `flags` [in] - Flags governing the behavior of the
+ operation performed (see H5FDpublic.h
+ for a list of valid flags)
+ `input` [in] - A pointer to arguments passed to the
+ VFD performing the operation
+ `output` [out] - A pointer for the receiving VFD to
+ use for output from the operation
+
+ (JRM - 2021/08/16)
+
- Change how the release part of version, in major.minor.release is checked
for compatibility