asepharyana
d00881c2b9
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1.5 KiB
1.5 KiB
Implementation Spec: Round 20 — Auto Concurrency
Goal
parallel_map / parallel_map_unordered / parallel_for_each terima
usize (eksplisit, existing) ATAU () (auto dari host CPU cores). Tidak
perlu nama API baru — trait ParallelConcurrency resolve di call-site.
Design
- Trait
ParallelConcurrency:fn resolve(self) -> usize- impl
usize→self.max(1)(behavior lama, backward compatible) - impl
()→std::thread::available_parallelism()fallback 1
- impl
- 3 fungsi berubah:
concurrency: usize→concurrency: C where C: ParallelConcurrencylet n = concurrency.resolve();- Body tidak berubah (pakai
n)
- Export trait di lib.rs
Backward compat
Caller existing parallel_map(items, 4, f) tetap compile — 4 resolve ke
usize (satu-satunya impl integer). Literal inference OK karena trait bound
memaksa usize.
Files
- crates/mytheclipse/src/parallel_map.rs (trait + 3 signature)
- crates/mytheclipse/src/lib.rs (export ParallelConcurrency)
- crates/mytheclipse/examples/scaling_demo.rs (demo auto run)
- doctests: tambah contoh auto
()di parallel_map & parallel_for_each - tests:
auto_concurrency_uses_cpu_cores(peak ≤ cores), hasil benar
Verification
cargo test -p mytheclipse parallel --all-features— 0 FAILEDcargo test -p mytheclipse --test race_stress --all-features— 0 FAILEDcargo build --workspace --all-features— exit 0cargo clippy --workspace --all-features— 0 newcargo run --example scaling_demo— auto run peak == cores- spec + commit + push