Struct WasmImports 

pub struct WasmImports {
    pub pd_send: Box<dyn Fn(*const u8, u32, *const u8, u32) -> i32 + Send + Sync + 'static>,
    pub pd_now_micros: Box<dyn Fn() -> u64 + Send + Sync + 'static>,
    pub pd_log: Box<dyn Fn(i32, *const u8, u32) + Send + Sync + 'static>,
}

Host function callbacks injected into a WASM module at instantiation.

These correspond to the pd_* imports that a plugin WASM module may call. The closures receive raw pointers into a buffer that was read from WASM linear memory immediately before the call; the pointers are valid for the duration of the call only.

The + Send + Sync + 'static bounds are required because wasmtime host functions must be thread-safe. Use Default to obtain no-op stubs.

Fields

pd_send: Box<dyn Fn(*const u8, u32, *const u8, u32) -> i32 + Send + Sync + 'static>

Send a message to another actor.

Arguments: (envelope_ptr, envelope_len, payload_ptr, payload_len). Returns 0 on success, negative on error.

pd_now_micros: Box<dyn Fn() -> u64 + Send + Sync + 'static>

Return the current engine time in microseconds.

pd_log: Box<dyn Fn(i32, *const u8, u32) + Send + Sync + 'static>

Emit a log message.

Arguments: (level, msg_ptr, msg_len).

Trait Implementations

impl Default for WasmImports

fn default() -> Self

No-op stubs — suitable for tests that don’t exercise host imports.