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-rw-r--r--release_docs/RELEASE.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 242d3e6..13331b1 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -384,6 +384,23 @@ New Features
Library:
--------
+ - File locking now works on Windows
+
+ Since version 1.10.0, the HDF5 library has used a file locking scheme
+ to help enforce one reader at a time accessing an HDF5 file, which can
+ be helpful when setting up readers and writers to use the single-
+ writer/multiple-readers (SWMR) access pattern.
+
+ In the past, this was only functional on POSIX systems where flock() or
+ fcntl() were present. Windows used a no-op stub that always succeeded.
+
+ HDF5 now uses LockFileEx() and UnlockFileEx() to lock the file using the
+ same scheme as POSIX systems. We lock the entire file when we set up the
+ locks (by passing DWORDMAX as both size parameters to LockFileEx()).
+
+ (DER - 2021/03/19, HDFFV-10191)
+
+
- H5Epush_ret() now requires a trailing semicolon
H5Epush_ret() is a function-like macro that has been changed to