Struct wasmer_wasi::WasiEnv

pub struct WasiEnv {
    pub state: Arc<Mutex<WasiState>>,
    // some fields omitted
}

The environment provided to the WASI imports.

Fields

state: Arc<Mutex<WasiState>>

Shared state of the WASI system. Manages all the data that the executing WASI program can see.

Be careful when using this in host functions that call into Wasm: if the lock is held and the Wasm calls into a host function that tries to lock this mutex, the program will deadlock.

Implementations

impl WasiEnv

pub fn memory_ref(&self) -> Option<&Memory>

Get access to the underlying data.

If WasmerEnv::finish has been called, this function will never return None unless the underlying data has been mutated manually.

pub unsafe fn memory_ref_unchecked(&self) -> &Memory

Gets the item without checking if it's been initialized.

Safety

WasmerEnv::finish must have been called on this function or this type manually initialized.

impl WasiEnv

pub fn new(state: WasiState) -> Self

pub fn import_object(
    &mut self,
    module: &Module
) -> Result<ImportObject, WasiError>

pub fn state(&self) -> MutexGuard<'_, WasiState>

Get the WASI state

Be careful when using this in host functions that call into Wasm: if the lock is held and the Wasm calls into a host function that tries to lock this mutex, the program will deadlock.

pub fn memory(&self) -> &Memory

Get a reference to the memory

Trait Implementations

impl Clone for WasiEnv

fn clone(&self) -> WasiEnv

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WasiEnv

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl WasmerEnv for WasiEnv

fn init_with_instance(
    &mut self,
    instance: &Instance
) -> Result<(), HostEnvInitError>

The function that Wasmer will call on your type to let it finish setting up the environment with data from the Instance.