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
32 lines
775 B
Rust
32 lines
775 B
Rust
use anyhow::{Context as _, Result};
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use wasmtime::*;
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#[test]
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fn test_invoke_func_via_table() -> Result<()> {
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let store = Store::default();
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let wat = r#"
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(module
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(func $f (result i64) (i64.const 42))
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(table (export "table") 1 1 anyfunc)
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(elem (i32.const 0) $f)
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)
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"#;
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let module = Module::new(store.engine(), wat).context("> Error compiling module!")?;
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let instance = Instance::new(&store, &module, &[]).context("> Error instantiating module!")?;
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let f = instance
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.get_table("table")
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.unwrap()
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.get(0)
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.unwrap()
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.funcref()
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.unwrap()
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.unwrap()
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.clone();
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let result = f.call(&[]).unwrap();
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assert_eq!(result[0].unwrap_i64(), 42);
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Ok(())
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}
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