Struct wasmtime_runtime::TlsRestore

pub struct TlsRestore(_);

Opaque state used to help control TLS state across stack switches for async support.

Implementations

impl TlsRestore

pub unsafe fn take() -> Result<TlsRestore, Box<Trap>>

Takes the TLS state that is currently configured and returns a token that is used to replace it later.

This is not a safe operation since it’s intended to only be used with stack switching found with fibers and async wasmtime.

pub unsafe fn replace(self) -> Result<(), Box<Trap>>

Restores a previous tls state back into this thread’s TLS.

This is unsafe because it’s intended to only be used within the context of stack switching within wasmtime.