26 lines
1.3 KiB
Plaintext
26 lines
1.3 KiB
Plaintext
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Phase 10.6b — Scheduler Prep (Single-Thread Queue)
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What’s added
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- `src/runtime/scheduler.rs` with `Scheduler` trait and `SingleThreadScheduler`.
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- Queue + delayed tasks (spawn/spawn_after) and `poll()` to run work.
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- VM calls `scheduler.poll()` at MIR `Safepoint` to integrate cooperative scheduling.
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- Poll budget via env `NYASH_SCHED_POLL_BUDGET` (default: 1)
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- Trace via `NYASH_SCHED_TRACE=1` (diagnostic)
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How to use (dev)
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- Build runtime with default SingleThreadScheduler (already default via builder), or inject custom via:
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`NyashRuntimeBuilder::new().with_single_thread_scheduler().build()`
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- Schedule tasks from boxes/host code via `runtime.scheduler.spawn(...)`.
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- At safepoints, queued tasks run (1 per safepoint) and due delayed tasks are enqueued.
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How to validate quickly
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- Run any Nyash program that contains loops or function entries (safepoints exist by default).
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- Optionally enable the demo hook: set `NYASH_SCHED_DEMO=1` and run the VM backend
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to observe scheduler tasks firing at safepoints.
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- Control throughput by `NYASH_SCHED_POLL_BUDGET` (e.g., 3 runs up to 3 tasks/safepoint).
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- GC trace pairs well: set `NYASH_GC_COUNTING=1 NYASH_GC_TRACE=1` to see safepoints.
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Next (10.6c+)
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- Expose scheduling APIs to script level (Box API).
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- Optional multi-thread scheduler implementation behind feature flag.
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