Runtime

The Daku runtime can be used alone or with other parts of the Daku specification. When using Daku, your target is a Daku plugin app. The Daku runtime specification defines how to asynchronously communicate between the plugin and the host app (which could either be another WASM sandboxed Daku plugin or a native Daku engine like Ardaku).

Guest Exports (Host Imports)

Export 32-bit memory as m
Export function main() -> () as a
Export ready list global List[ptr[Command]] pointer as r

Guest Imports (Host Exports)

Import function ar(cmd_size, cmd_addr) Asynchronous Request (Retconned from "Ardaku")

Plugin Communication Flow

Host calls guest's a() function
Guest creates a list of commands
Guest calls host's ar() function with list of commands
Host executes commands, when at least one completes, returns from ar() having set the data at pointer r in memory m to a list (using default length as capacity) of completed ptr[Command] list
Guest loops through the ptr[Command] ready-list and processes them, may either free or reüse the command structures
Guest generates new list of commands, calling ar() again (repeat)
Guest's a() function completes and plugin has stopped

Function: `ar()`

(import "daku" "ar" (func $event
   (param $cmd_size i32) ;; List[ptr[Command]].size
   (param $cmd_addr i32) ;; List[ptr[Command]].addr
))

Parameters

$cmd_size The size of the data pointed to by $cmd_addr
$cmd_addr A pointer in the wasm memory to a Command list of size $cmd_size

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