how can i set a struct as ExternalGlobal like global in js

[hunjixin]

how can i set a struct as ExternalGlobal like global in js

[twitchyliquid64]

I'm not sure I understand the question. If you mean how can you call into Go code from a wasm module, please have a look at TestHostCall in exec/call_test.go - this describes how you can add in a native function to a wasm.Module so you can call it from wasm code.

Basically, you manipulate the fields of wasm.Module to add in whatever functions or tables you like.

[hunjixin]

yes，function is ok，and simple variable is alson work，but i want to access a more global complex struct variable for other module

[hunjixin]

@twitchyliquid64 .
i write code by rust and then converto to wasm.
I want to set a global object in wagon , and access it in rust. how to write the code

[twitchyliquid64]

I think you can only pass 64bit arguments between function invocations. Anything else will need to be passed as a pointer/index and then use linear memory / tables.

For instance, you could write your rust code to save an object in linear memory 0x0000 - 0x2000, then use vm.Memory() to read that section of memory.