wasmy

wasmy, easily customize my wasm app!

features

• [x] Completely shield vm-wasm interaction details
• [x] Use protobuf as the interaction protocol
• [x] Simple and flexible ABI, supports freely adding vm and wasm handlers using attribute macros (#[vm_handle(0)]/#[wasm_handle(0)])
• [x] Provide attribute macro #[wasm_onload] support to initialize wasm

crates

• wasmy-vm : vm dependencies

toml [dependencies] wasmy-vm = "0.4.0"

• wasmy-abi : wasm dependencies

toml [dependencies] wasmy-abi = "0.4.0"

• wasmy-macros : no direct dependency

toml wasmy-macros = "0.4.0"

example

• wasm code (target = "wasm32-wasi")

```rust use rand::random; use wasmyabi::*; use wasmyabi::test::*;

[wasm_handle(0)]

fn multiply(ctx: Ctx, args: TestArgs) -> Result { let rid = random::() as i32; println!("[Wasm-Simple({})] handle guest method({}) ctx={:?}, args={{{:?}}}", rid, 0, ctx, args);

let mut host_args = TestArgs::new();
host_args.a = rid;
host_args.b = rid;
let host_res: TestResult = ctx.call_host(0, &host_args)?;
println!("[Wasm-Simple({})] call host method({}): args={{{:?}}}, result={}", rid, 0, host_res, host_res.get_c());

let mut res = TestResult::new();
res.set_c(args.a * args.b);
Ok(res)

} ```

• vm code

```rust use wasmy_vm::*; use crate::test::{TestArgs, TestResult};

...

fn main() { println!("wasmy, easily customize my wasm app!"); ... let inskey = loadwasm(wasmpath).unwrap(); let mut data = TestArgs::new(); data.seta(2); data.setb(5); let res: TestResult = callwasm(inskey.intowasmuri(), 0, data.clone()).unwrap(); println!("{}+{}={}", data.geta(), data.getb(), res.getc()) }

[vm_handle(0)]

fn add(args: TestArgs) -> Result { let mut res = TestResult::new(); res.set_c(args.a + args.b); Ok(res) } ```

test simple example

• raw cargo cmd:

```shell $ rustup target add wasm32-wasi

$ cargo +nightly build --target=wasm32-wasi --example=simple $ cargo +nightly run --example=vm -- ../../wasm32-wasi/debug/examples/simple.wasm ```

• alias cargo cmd:

```shell $ rustup target add wasm32-wasi

$ cargo +nightly wasm simple $ cargo +nightly vm simple ```