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127 lines
3.4 KiB
Rust
127 lines
3.4 KiB
Rust
pub(crate) mod function;
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mod global;
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mod memory;
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mod table;
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pub use self::function::{
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FromToNativeWasmType, Function, HostFunction, WasmTypeList, WithEnv, WithoutEnv,
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};
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#[cfg(feature = "deprecated")]
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pub use self::function::{UnsafeMutableEnv, WithUnsafeMutableEnv};
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pub use self::global::Global;
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pub use self::memory::Memory;
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pub use self::table::Table;
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use crate::exports::{ExportError, Exportable};
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use crate::store::{Store, StoreObject};
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use crate::ExternType;
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use loupe::MemoryUsage;
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use std::fmt;
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use wasmer_engine::Export;
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/// An `Extern` is the runtime representation of an entity that
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/// can be imported or exported.
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///
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/// Spec: <https://webassembly.github.io/spec/core/exec/runtime.html#external-values>
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#[derive(Clone, MemoryUsage)]
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pub enum Extern {
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/// A external [`Function`].
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Function(Function),
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/// A external [`Global`].
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Global(Global),
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/// A external [`Table`].
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Table(Table),
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/// A external [`Memory`].
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Memory(Memory),
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}
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impl Extern {
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/// Return the underlying type of the inner `Extern`.
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pub fn ty(&self) -> ExternType {
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match self {
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Self::Function(ft) => ExternType::Function(ft.ty().clone()),
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Self::Memory(ft) => ExternType::Memory(*ft.ty()),
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Self::Table(tt) => ExternType::Table(*tt.ty()),
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Self::Global(gt) => ExternType::Global(*gt.ty()),
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}
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}
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/// Create an `Extern` from an `wasmer_vm::Export`.
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pub fn from_vm_export(store: &Store, export: Export) -> Self {
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match export {
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Export::Function(f) => Self::Function(Function::from_vm_export(store, f)),
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Export::Memory(m) => Self::Memory(Memory::from_vm_export(store, m)),
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Export::Global(g) => Self::Global(Global::from_vm_export(store, g)),
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Export::Table(t) => Self::Table(Table::from_vm_export(store, t)),
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}
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}
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}
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impl<'a> Exportable<'a> for Extern {
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fn to_export(&self) -> Export {
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match self {
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Self::Function(f) => f.to_export(),
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Self::Global(g) => g.to_export(),
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Self::Memory(m) => m.to_export(),
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Self::Table(t) => t.to_export(),
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}
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}
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fn get_self_from_extern(_extern: &'a Self) -> Result<&'a Self, ExportError> {
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// Since this is already an extern, we can just return it.
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Ok(_extern)
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}
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}
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impl StoreObject for Extern {
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fn comes_from_same_store(&self, store: &Store) -> bool {
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let my_store = match self {
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Self::Function(f) => f.store(),
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Self::Global(g) => g.store(),
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Self::Memory(m) => m.store(),
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Self::Table(t) => t.store(),
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};
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Store::same(my_store, store)
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}
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}
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impl fmt::Debug for Extern {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(
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f,
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"{}",
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match self {
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Self::Function(_) => "Function(...)",
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Self::Global(_) => "Global(...)",
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Self::Memory(_) => "Memory(...)",
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Self::Table(_) => "Table(...)",
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}
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)
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}
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}
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impl From<Function> for Extern {
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fn from(r: Function) -> Self {
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Self::Function(r)
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}
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}
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impl From<Global> for Extern {
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fn from(r: Global) -> Self {
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Self::Global(r)
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}
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}
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impl From<Memory> for Extern {
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fn from(r: Memory) -> Self {
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Self::Memory(r)
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}
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}
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impl From<Table> for Extern {
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fn from(r: Table) -> Self {
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Self::Table(r)
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}
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}
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