Crate wasmtime_wasi

Wasmtime’s WASI Implementation

This crate provides a Wasmtime host implementations of different versions of WASI. WASI is implemented with the Rust crates [tokio] and cap-std primarily, meaning that operations are implemented in terms of their native platform equivalents by default.

For components and WASIp2, see p2. For WASIp1 and core modules, see the preview1 module documentation.

Re-exports

pub use async_trait::async_trait;

pub use cap_fs_ext::SystemTimeSpec;

pub use cap_rand::RngCore;

pub use wasmtime::component::ResourceTable;

pub use wasmtime::component::ResourceTableError;

Modules

p2

Wasmtime’s WASIp2 Implementation

preview0preview1

Bindings for WASIp0 aka Preview 0 aka wasi_unstable.

preview1preview1

Bindings for WASIp1 aka Preview 1 aka wasi_snapshot_preview1.

runtime

This module provides an “ambient Tokio runtime” with_ambient_tokio_runtime. Embedders of wasmtime-wasi may do so from synchronous Rust, and not use tokio directly. The implementation of wasmtime-wasi requires a tokio executor in a way that is deeply tied to its design. When used from a synchronous wasmtime context, this module provides the wrapper function in_tokio used throughout the shim implementations of synchronous component binding Host traits in terms of the async ones.

Structs

Deterministic

Implement insecure-random using a deterministic cycle of bytes.

DirPerms

Permission bits for operating on a directory.

FilePerms

I32Exit

An error returned from the proc_exit host syscall.

Network

OpenMode

TrappableError

A helper error type used by many other modules through type aliases.

Enums

SocketAddrUse

The reason what a socket address is being used for.

Traits

HostMonotonicClock

HostWallClock

Functions

thread_rng