elixir: convert DirtyIo nifs to use message passing for asynchronous responses#172
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elixir: convert DirtyIo nifs to use message passing for asynchronous responses#172
DirtyIo nifs to use message passing for asynchronous responses#172Conversation
Signed-off-by: Nathan Perry <nathan@tailscale.com> Change-Id: Ibdfa3c10dd50379a43b52a07c1a713cd6a6a6964
Potentially-blocking Rust-side calls now use message passing to respond to the caller. Elixir now has `Tailscale.Util.await`, which spawns a task that listens for the relevant response. Signed-off-by: Nathan Perry <nathan@tailscale.com> Change-Id: Iafe01153ca52b9f618c80666de5e6f186a6a6964
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DirtyIoNIFs are thread-pooled by the BEAM behind the scenes, and though the pool is configurable, this approach can limit throughput in highly concurrent scenarios. This is an alternate approach that offloads the synchronization to message passing using elixir'sTaskabstraction (slightly cleaner interface around processes) and a helper macro that handles destructuring the response message and waiting for the task