Sha256: 7c57a068c9f34d8d5a0ed6f4e4b5f31ab70af97bfe2193a326a7251c6dd4c281
Contents?: true
Size: 1018 Bytes
Versions: 16
Compression:
Stored size: 1018 Bytes
Contents
use rand_core::SeedableRng;
use rand_pcg::Pcg64Mcg;
use wasi_common::WasiCtx;
mod clocks;
mod noop_scheduler;
use noop_scheduler::NoopScheduler;
pub fn build_wasi_ctx() -> WasiCtx {
// Using Pcg64Mcg because it balances memory usage, performance, is adequately random, does not have major issues,
// and has reproducible results across different platforms. SmallRng and StdRng were considered but are documented
// as deterministic but not reproducible.
// See https://rust-random.github.io/book/guide-rngs.html#basic-pseudo-random-number-generators-prngs
// and https://docs.rs/rand_pcg/latest/rand_pcg/struct.Mcg128Xsl64.html for further details.
const RANDOM_SEED: u64 = 42; // the answer to life, the universe, and everything
let random = Box::new(Pcg64Mcg::seed_from_u64(RANDOM_SEED));
let clocks = clocks::new_clocks();
let scheduler = Box::new(NoopScheduler::new());
let table = wasi_common::table::Table::new();
WasiCtx::new(random, clocks, scheduler, table)
}
Version data entries
16 entries across 16 versions & 1 rubygems