waPC Guest Library for AssemblyScript
This is the AssemblyScript implementation of the waPC standard for WebAssembly guest modules. It allows any waPC-compliant WebAssembly host to invoke to procedures inside a AssemblyScript compiled guest and similarly for the guest to invoke procedures exposed by the host.
Example
The following is a simple example of synchronous, bi-directional procedure calls between a WebAssembly host runtime and the guest module.
import {
register,
handleCall,
hostCall,
handleAbort,
Result,
} from "../assembly";
register("hello", function (payload: ArrayBuffer): Result {
hostCall("myBinding", "sample", "hello", String.UTF8.encode("Simon"));
return Result.ok(String.UTF8.encode("Hello"));
});
// This must be present in the entry file. Do not remove.
export function __guest_call(operation_size: usize, payload_size: usize): bool {
return handleCall(operation_size, payload_size);
}
function abort(message: string | null, fileName: string | null, lineNumber: u32, columnNumber: u32): void {
handleAbort(message, fileName, lineNumber, columnNumber)
}asc example/hello.ts -b example/hello.wasm --use abort=example/hello/abort --validate --optimize