47 lines
1.5 KiB
Rust
47 lines
1.5 KiB
Rust
use alloc::boxed::Box;
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use anyhow::Result;
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use cranelift_entity::PrimaryMap;
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use wasmtime_environ::Module;
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use wasmtime_runtime::{InstanceHandle, VMGlobalDefinition};
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use super::create_handle::create_handle;
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use crate::{GlobalType, Mutability, Val};
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#[allow(dead_code)]
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pub struct GlobalState {
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definition: Box<VMGlobalDefinition>,
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handle: InstanceHandle,
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}
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pub fn create_global(gt: &GlobalType, val: Val) -> Result<(wasmtime_runtime::Export, GlobalState)> {
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let mut definition = Box::new(VMGlobalDefinition::new());
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unsafe {
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match val {
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Val::I32(i) => *definition.as_i32_mut() = i,
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Val::I64(i) => *definition.as_i64_mut() = i,
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Val::F32(f) => *definition.as_u32_mut() = f,
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Val::F64(f) => *definition.as_u64_mut() = f,
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_ => unimplemented!("create_global for {:?}", gt),
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}
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}
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let global = cranelift_wasm::Global {
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ty: gt.content().get_cranelift_type(),
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mutability: match gt.mutability() {
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Mutability::Const => false,
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Mutability::Var => true,
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},
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initializer: cranelift_wasm::GlobalInit::Import, // TODO is it right?
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};
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let mut handle =
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create_handle(Module::new(), None, PrimaryMap::new(), Box::new(())).expect("handle");
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Ok((
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wasmtime_runtime::Export::Global {
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definition: definition.as_mut(),
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vmctx: handle.vmctx_mut_ptr(),
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global,
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},
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GlobalState { definition, handle },
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))
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}
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