v0.14.0

[0.14.0] - 2026-06-08

Added

• Implemented sendFile for net.Stream.Writer on all platforms, for now just using generic code
  that does concurrent reads and writes. Platorm-specific improvements for Linux, FreeBSD and Windows
  will be added later.
• Added support for opening/creating files with resolve_beneath on Linux, macOS, and FreeBSD.
  By default, the operation will fail on platforms that don't support it. You can disable it
  using the resolve_beneath_mode build option.
• Implemented support for renamePreserve on macOS.
• Implemented file locking on all platforms.
• Added zio.Mutex.Recursive that works in both blocking and non-blocking contexts.
• Added support for pub const std_options_debug_io = zio.debug_io in your root module,
  for integration with std.log, std.debug.print and also the default panic handler.

Changed

• Setting max_threads = 0 in the thread pool options now disables the thread pool, executing
  blocking work inline on the calling thread (the same behavior as a single-threaded build).
• Re-enabled task migration by default, so for example unlocking mutex will schedule the blocked
  task waiting on the mutex on the same thread, avoiding cross-thread wake up.
• Streaming file reads/writes now auto-detect the file type and use the appropriate method
  for async operations. This only affects macOS/BSDs on Linux with the epoll backend.
  Regular file reads/writes are still going through the thread pool, but pipes can go through
  the event loop.

Fixed

• Fixed cross-thread I/O cancelation on kqueue backend.
• Fixed internal I/O opertion accounting on the IOCP backend that could lead to integer underflow in multi-threaded mode.
• Fixed mapping of ESPIPE to error.Unseekable to help std.Io.File.Reader with mode detection.
• Fixed macOS-specific deleteFile error mapping, to return error.IsDir when the path is a directory.
• Fixed handling of follow_symlinks, path_only, and allow_ctty file open/create flags.