v1.44.0: Tokio v1.44.0

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1.44.0 (March 7th, 2025)

This release changes the from_std method on sockets to panic if a blocking socket is provided. We determined this change is not a breaking change as Tokio is not intended to operate using blocking sockets. Doing so results in runtime hangs and should be considered a bug. Accidentally passing a blocking socket to Tokio is one of the most common user mistakes. If this change causes an issue for you, please comment on #​7172.

Added

• coop: add task::coop module (#​7116)
• process: add Command::get_kill_on_drop() (#​7086)
• sync: add broadcast::Sender::closed (#​6685, #​7090)
• sync: add broadcast::WeakSender (#​7100)
• sync: add oneshot::Receiver::is_empty() (#​7153)
• sync: add oneshot::Receiver::is_terminated() (#​7152)

Fixed

• fs: empty reads on File should not start a background read (#​7139)
• process: calling start_kill on exited child should not fail (#​7160)
• signal: fix CTRL_CLOSE, CTRL_LOGOFF, CTRL_SHUTDOWN on windows (#​7122)
• sync: properly handle panic during mpsc drop (#​7094)

Changes

• runtime: clean up magic number in registration set (#​7112)
• coop: make coop yield using waker defer strategy (#​7185)
• macros: make select! budget-aware (#​7164)
• net: panic when passing a blocking socket to from_std (#​7166)
• io: clean up buffer casts (#​7142)

Changes to unstable APIs

• rt: add before and after task poll callbacks (#​7120)
• tracing: make the task tracing API unstable public (#​6972)

Documented

• docs: fix nesting of sections in top-level docs (#​7159)
• fs: rename symlink and hardlink parameter names (#​7143)
• io: swap reader/writer in simplex doc test (#​7176)
• macros: docs about select! alternatives (#​7110)
• net: rename the argument for send_to (#​7146)
• process: add example for reading Child stdout (#​7141)
• process: clarify Child::kill behavior (#​7162)
• process: fix grammar of the ChildStdin struct doc comment (#​7192)
• runtime: consistently use worker_threads instead of core_threads (#​7186)