function prototype signature

[bananaturtlesandwich]

Just reading through the docs on exporting apis and it just kind of brushes over it in the native symbols declaration:

// Define an array of NativeSymbol for the APIs to be exported. 
// Note: the array must be static defined since runtime
//       will keep it after registration
static NativeSymbol native_symbols[] = 
{
    {
        "foo", 		// the name of WASM function name
     	foo_native, // the native function pointer
        "(ii)i"		// the function prototype signature
    },
    {
        "foo2", 		// the name of WASM function name
     	foo2, 			// the native function pointer
        "($*~)"			// the function prototype signature
    }    
};

what actually is a function prototype signature?

[bananaturtlesandwich]

nevermind found it https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/core/iwasm/include/wasm_export.h#L1090