Struct holochain_wasmer_host::env::Env

pub struct Env {
    pub memory: Option<Memory>,
    pub allocate: Option<TypedFunction<i32, i32>>,
    pub deallocate: Option<TypedFunction<(i32, i32), ()>>,
    pub wasmer_metering_points_exhausted: Option<Global>,
    pub wasmer_metering_remaining_points: Option<Global>,
}

Fields

memory: Option<Memory>

allocate: Option<TypedFunction<i32, i32>>

deallocate: Option<TypedFunction<(i32, i32), ()>>

wasmer_metering_points_exhausted: Option<Global>

wasmer_metering_remaining_points: Option<Global>

Implementations

impl Env

pub fn move_data_to_guest<I>( &self, store_mut: &mut StoreMut<'_>, input: I ) -> Result<GuestPtrLen, RuntimeError>

where I: Serialize + Debug,

Given some input I that can be serialized, request an allocation from the guest and copy the serialized bytes to the allocated pointer. The guest MUST subsequently take ownership of these bytes or it will leak memory.

pub fn consume_bytes_from_guest<O>( &self, store_mut: &mut StoreMut<'_>, guest_ptr: GuestPtr, len: Len ) -> Result<O, RuntimeError>

where O: DeserializeOwned + Debug,

Given a pointer and length for a region of memory in the guest, copy the bytes to the host and attempt to deserialize type O from the data. The guest will be asked to deallocate the copied bytes whether or not the deserialization is successful.

pub fn get_remaining_points( &self, store_mut: &mut StoreMut<'_> ) -> Result<MeteringPoints, RuntimeError>

Mimics upstream function of the same name but accesses the global directly from env. https://github.com/wasmerio/wasmer/blob/master/lib/middlewares/src/metering.rs#L285

pub fn set_remaining_points( &self, store_mut: &mut StoreMut<'_>, points: u64 ) -> Result<(), RuntimeError>

pub fn decrease_points( &self, store_mut: &mut StoreMut<'_>, points: u64 ) -> Result<MeteringPoints, RuntimeError>

Trait Implementations

impl Clone for Env

fn clone(&self) -> Env

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Env

fn default() -> Env

Returns the “default value” for a type.