Enum wasmer_vm::ImportFunctionEnv[−][src]

pub enum ImportFunctionEnv {
    NoEnv,
    Env {
        env: *mut c_void,
        clone: fn(_: *mut c_void) -> *mut c_void,
        initializer: Option<ImportInitializerFuncPtr>,
        destructor: unsafe fn(_: *mut c_void),
    },
}
Expand description

A collection of data about host envs used by imported functions.

Variants

NoEnv

The vmctx pointer does not refer to a host env, there is no metadata about it.

Env

We’re dealing with a user-defined host env.

This host env may be either unwrapped (the user-supplied host env directly) or wrapped. i.e. in the case of Dynamic functions, we store our own extra data along with the user supplied env, thus the env pointer here points to the outermost type.

Show fields

Fields of Env

env: *mut c_void

The function environment. This is not always the user-supplied env.

clone: fn(_: *mut c_void) -> *mut c_void

A clone function for duplicating the env.

initializer: Option<ImportInitializerFuncPtr>

This field is not always present. When it is present, it should be set to None after use to prevent double initialization.

destructor: unsafe fn(_: *mut c_void)

The destructor to clean up the type in env.

Safety

  • This function must be called ina synchronized way. For example, in the Drop implementation of this type.

Trait Implementations

impl Clone for ImportFunctionEnv[src]

fn clone(&self) -> Self[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for ImportFunctionEnv[src]

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

Formats the value using the given formatter. Read more

impl Drop for ImportFunctionEnv[src]

fn drop(&mut self)[src]

Executes the destructor for this type. Read more

impl MemoryUsage for ImportFunctionEnv[src]

fn size_of_val(&self, _: &mut dyn MemoryUsageTracker) -> usize[src]

Returns the size of the referenced value in bytes. Read more

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> ArchivePointee for T

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

pub fn pointer_metadata(
    &<T as ArchivePointee>::ArchivedMetadata
) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> Pointee for T

type Metadata = ()

The type for metadata in pointers and references to Self.

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.