julia

e553dba8 - base: Deliver ^C notifications while the io thread runs foreign code

base: Deliver ^C notifications while the io thread runs foreign code Outside a threaded region, only the io thread is permitted to run the libuv event loop; every other idle thread parks after poking it. When the io thread is blocked in a long-running foreign call (e.g. a large BLAS operation typed at the REPL), the entire event loop therefore stalls - including the AsyncCondition that wakes the sigint listener - so a ^C sat undelivered until the foreign call returned, defeating the cancellation hook that could have interrupted it. Fix the delivery chain: the C-side notification now marks a pending sigint dispatch and wakes all threads (not just the io thread), and the scheduler lets an idle thread take over the (free) event loop while a sigint dispatch is pending, or while the io thread is parked in a gc-safe foreign region. The julia-side listener clears the pending flag once the notification reaches it. With this (plus the LinearAlgebra-side cancellation hooks), ^C during an interactive A * B on a patched OpenBLAS returns to the prompt in under two seconds instead of waiting out the multiplication. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012nCkyKUguncLLJrH9K5o7m