Programming languages that do not support pointer implement the proxy-wasm ABI

[Jing-ze]

In the ABI Spec, most functions use pointers as input parameters to get return values. How can the ABI implement in languages that do not support obtaining variable address using pointer, such as TypeScript, Python?

[Jing-ze]

For example:
proxy_get_header_map_value

• params:
  • i32 (proxy_map_type_t) map_id
  • i32 (const char *) key_data
  • i32 (size_t) key_size
  • i32 (uint8_t **) return_value_data
  • i32 (size_t *) return_value_size
• returns:
  • i32 (proxy_status_t) status

input parameter use uint8_t** return_value_data to get the return value