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use std::mem;
use std::cell::RefCell;
use std::rc::Rc;
use std::collections::HashMap;
use std::panic::{self, PanicInfo};
mod wasm_ffi;
mod rust_exports;
mod js_ser;
mod ser_constants;
mod js_val_impl;
pub use js_ser::JsSerializable;
#[macro_use]
extern crate num_derive;
extern crate num_traits;
extern crate byteorder;
#[no_mangle]
pub extern "C" fn wasm_val_rust_alloc(capacity: u32) -> *mut u8 {
rust_exports::rust_alloc(capacity)
}
#[no_mangle]
pub extern "C" fn wasm_val_rust_free(ptr: u32, capacity: u32) {
rust_exports::rust_free(ptr as *mut u8, capacity as usize);
}
#[no_mangle]
pub extern "C" fn wasm_val_get_api_version() -> u32 {
rust_exports::get_api_version()
}
#[no_mangle]
pub extern "C" fn wasm_val_register_panic_hook() -> () {
panic::set_hook(Box::new(|panic_info: &PanicInfo| {
wasm_ffi::panic_fn(panic_info.to_string());
}));
}
thread_local! {
static CALLBACKS_KEY: RefCell<HashMap<u32, Rc<dyn Fn() -> () >>> = RefCell::new(HashMap::new());
static CALLBACKS_RET_KEY: RefCell<HashMap<u32, Rc<dyn Fn() -> (Box<JsSerializable>) >>> = RefCell::new(HashMap::new());
static CALLBACKS_ARG_KEY: RefCell<HashMap<u32, Rc<dyn Fn(JsValue) -> () >>> = RefCell::new(HashMap::new());
static CALLBACKS_ARG_RET_KEY: RefCell<HashMap<u32, Rc<dyn Fn(JsValue) -> (Box<JsSerializable>) >>> = RefCell::new(HashMap::new());
static LAST_CALLBACK_ID_KEY: RefCell<u32> = RefCell::new(1);
}
#[no_mangle]
pub extern "C" fn wasm_val_call_registered_callback(key: u32) -> () {
let callback = CALLBACKS_KEY.with(|callbacks_cell| {
let map = callbacks_cell.borrow();
map[&key].clone()
});
callback()
}
#[no_mangle]
pub extern "C" fn wasm_val_call_registered_callback_ret(key: u32) -> (*mut u8) {
let callback = CALLBACKS_RET_KEY.with(|callbacks_cell| {
let map = callbacks_cell.borrow();
map[&key].clone()
});
let ret = callback();
let mut vec = JsValue::ser_single_val(&(*ret));
let ptr = vec.as_mut_ptr();
mem::forget(vec);
ptr
}
#[no_mangle]
pub extern "C" fn wasm_val_call_registered_callback_arg(key: u32, ptr: *mut u8) -> () {
let vec = unsafe { Vec::from_raw_parts(ptr, wasm_ffi::SINGLE_VAL_VEC_LEN, wasm_ffi::SINGLE_VAL_VEC_LEN) };
let val = JsValue::get_single_val(vec);
let callback = CALLBACKS_ARG_KEY.with(|callbacks_cell| {
let map = callbacks_cell.borrow();
map[&key].clone()
});
callback(val)
}
#[no_mangle]
pub extern "C" fn wasm_val_call_registered_callback_arg_ret(key: u32, ptr: *mut u8) -> (*mut u8) {
let vec = unsafe { Vec::from_raw_parts(ptr, wasm_ffi::SINGLE_VAL_VEC_LEN, wasm_ffi::SINGLE_VAL_VEC_LEN) };
let val = JsValue::get_single_val(vec);
let callback = CALLBACKS_ARG_RET_KEY.with(|callbacks_cell| {
let map = callbacks_cell.borrow();
map[&key].clone()
});
let ret = callback(val);
let mut vec = JsValue::ser_single_val(&(*ret));
let ptr = vec.as_mut_ptr();
mem::forget(vec);
ptr
}
fn get_next_callback_id() -> u32 {
LAST_CALLBACK_ID_KEY.with(|last_callback_id_cell| {
let id = *last_callback_id_cell.borrow();
last_callback_id_cell.replace(id + 1);
id
})
}
fn register_callback(callback: &'static Fn() -> ()) -> u32 {
CALLBACKS_KEY.with(|callbacks_cell| {
let id = get_next_callback_id();
callbacks_cell.borrow_mut().insert(id, Rc::new(callback));
id
})
}
fn register_callback_ret(callback: &'static Fn() -> (Box<JsSerializable>)) -> u32 {
CALLBACKS_RET_KEY.with(|callbacks_cell| {
let id = get_next_callback_id();
callbacks_cell.borrow_mut().insert(id, Rc::new(callback));
id
})
}
fn register_callback_arg(callback: &'static Fn(JsValue) -> ()) -> u32 {
CALLBACKS_ARG_KEY.with(|callbacks_cell| {
let id = get_next_callback_id();
callbacks_cell.borrow_mut().insert(id, Rc::new(callback));
id
})
}
fn register_callback_ret_arg(callback: &'static Fn(JsValue) -> (Box<JsSerializable>)) -> u32 {
CALLBACKS_ARG_RET_KEY.with(|callbacks_cell| {
let id = get_next_callback_id();
callbacks_cell.borrow_mut().insert(id, Rc::new(callback));
id
})
}
pub struct JsValue {
pub js_type: Type,
val: Val,
}
pub enum Type {
Empty,
Boolean,
Number,
String,
Array,
TypedArray(ArrayType),
Object,
Function,
Error,
}
pub enum ArrayType {
I8,
U8,
I16,
U16,
I32,
U32,
F32,
F64,
}
enum Val {
None,
Boolean(bool),
Number(f64),
String(String),
Ref(u32),
}