1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
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_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_ARG_KEY: RefCell<HashMap<u32, Rc<dyn Fn(JsValue)>>> = 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_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)
}
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_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
})
}
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),
}