58bb5dd953
`funcref`s are implemented as `NonNull<VMCallerCheckedAnyfunc>`. This should be more efficient than using a `VMExternRef` that points at a `VMCallerCheckedAnyfunc` because it gets rid of an indirection, dynamic allocation, and some reference counting. Note that the null function reference is *NOT* a null pointer; it is a `VMCallerCheckedAnyfunc` that has a null `func_ptr` member. Part of #929
22 lines
620 B
Rust
22 lines
620 B
Rust
use anyhow::Result;
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use wasmtime::*;
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#[test]
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fn use_func_after_drop() -> Result<()> {
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let table;
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{
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let store = Store::default();
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let closed_over_data = String::from("abcd");
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let func = Func::wrap(&store, move || {
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assert_eq!(closed_over_data, "abcd");
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});
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let ty = TableType::new(ValType::FuncRef, Limits::new(1, None));
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table = Table::new(&store, ty, Val::FuncRef(None))?;
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table.set(0, func.into())?;
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}
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let func = table.get(0).unwrap().funcref().unwrap().unwrap().clone();
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let func = func.get0::<()>()?;
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func()?;
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Ok(())
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}
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