Claude
393cdd01f4
FdArm composes fd readiness with channel arms on one wait epoch. Selectable grows fallible sel_register and an eager-cleanup hook; losing/stop-unwound/timed-out fd arms are unregistered (waiters entry + kernel ONESHOT) so the fd is never poisoned. try_select / try_select_timeout surface registration errors (EBADF, EMFILE, AlreadyExists) instead of RFC 008's permanently-ready lean, which would busy-loop a healthy-but-unregistrable fd; select/select_timeout stay infallible for channel-only arms. Adds wait_readable_timeout / wait_writable_timeout as one-arm selects. Known benign race (pre-existing, slightly widened): a queued FdReady racing the cleanup DEL can spuriously wake a fresh waiter on that fd; absorbed by select's defensive re-loop. Fixable by epoch-stamping completions.
78 lines
2.7 KiB
Rust
78 lines
2.7 KiB
Rust
//! # smarm — Silly Marks Abstract Rust Machine
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//!
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//! Erlang-style green-thread actor concurrency for Rust.
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//!
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//! Multi-threaded: N scheduler OS threads (default: one per CPU) share a
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//! single global run queue behind a `Mutex`. Actors communicate by sending
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//! `Send` messages over channels; every actor has a supervisor. Synchronisation
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//! primitives — `Mutex<T>` with mandatory lock timeouts, channel `recv`,
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//! `sleep`, and epoll-backed `wait_readable`/`wait_writable` — all park the
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//! green thread, never the OS thread.
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//!
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//! See `LOOM.md` for the design intent and the deferred-for-later list.
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pub mod stack;
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pub mod context;
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pub mod preempt;
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pub mod pid;
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pub mod actor;
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pub mod channel;
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pub mod scheduler;
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pub mod supervisor;
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pub mod timer;
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pub mod io;
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pub mod mutex;
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pub mod monitor;
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pub mod registry;
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pub mod link;
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pub mod gen_server;
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pub mod runtime;
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pub(crate) mod raw_mutex;
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pub(crate) mod slot_state;
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pub(crate) mod sync_shim;
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#[doc(hidden)] // pub only so benches/rq_micro.rs can drive the raw structures
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pub mod run_queue;
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pub mod trace;
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// ---------------------------------------------------------------------------
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// Global allocator
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// ---------------------------------------------------------------------------
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#[global_allocator]
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static ALLOCATOR: preempt::PreemptingAllocator = preempt::PreemptingAllocator;
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// ---------------------------------------------------------------------------
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// Public API re-exports
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// ---------------------------------------------------------------------------
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pub use channel::{
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channel, select, select_timeout, try_select, try_select_timeout, Receiver, RecvError,
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RecvTimeoutError, Selectable, Sender,
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};
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pub use gen_server::{CallError, CallTimeoutError, CastError, GenServer, ServerBuilder, ServerCtx, ServerRef, Watcher};
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pub use link::{link, trap_exit, unlink, ExitSignal};
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pub use monitor::{demonitor, monitor, Down, DownReason, Monitor, MonitorId};
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pub use mutex::{LockTimeout, Mutex, MutexGuard};
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pub use pid::Pid;
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pub use registry::{name_of, register, unregister, whereis, RegisterError};
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pub use runtime::{init, Config, Runtime};
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pub use scheduler::{
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block_on_io, request_stop, run, self_pid, sleep, spawn, spawn_under, wait_readable,
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wait_readable_timeout, wait_writable, wait_writable_timeout, yield_now, FdArm, JoinError,
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JoinHandle,
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};
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pub use supervisor::{ChildSpec, OneForOne, Restart, Signal, Strategy};
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// ---------------------------------------------------------------------------
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// check!()
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// ---------------------------------------------------------------------------
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/// Voluntarily check whether this actor's timeslice has expired, yielding
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/// if so.
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#[macro_export]
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macro_rules! check {
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() => {
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$crate::preempt::maybe_preempt()
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};
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}
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