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
|
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
use libc::c_char;
use libc::c_int;
use libc::c_void;
use std::ops::{Deref, DerefMut};
use std::ptr::null;
// TODO(F001): change this definition to `extern { pub type isolate; }`
// After RFC 1861 is stablized. See https://github.com/rust-lang/rust/issues/43467.
#[repr(C)]
pub struct isolate {
_unused: [u8; 0],
}
/// If "alloc_ptr" is not null, this type represents a buffer which is created
/// in C side, and then passed to Rust side by `DenoRecvCb`. Finally it should
/// be moved back to C side by `deno_respond`. If it is not passed to
/// `deno_respond` in the end, it will be leaked.
///
/// If "alloc_ptr" is null, this type represents a borrowed slice.
#[repr(C)]
pub struct deno_buf {
alloc_ptr: *const u8,
alloc_len: usize,
data_ptr: *const u8,
data_len: usize,
}
/// `deno_buf` can not clone, and there is no interior mutability.
/// This type satisfies Send bound.
unsafe impl Send for deno_buf {}
impl deno_buf {
pub fn empty() -> Self {
Self {
alloc_ptr: null(),
alloc_len: 0,
data_ptr: null(),
data_len: 0,
}
}
pub unsafe fn from_raw_parts(ptr: *const u8, len: usize) -> Self {
Self {
alloc_ptr: null(),
alloc_len: 0,
data_ptr: ptr,
data_len: len,
}
}
}
/// Converts Rust &Buf to libdeno `deno_buf`.
impl<'a> From<&'a [u8]> for deno_buf {
fn from(x: &'a [u8]) -> Self {
Self {
alloc_ptr: null(),
alloc_len: 0,
data_ptr: x.as_ref().as_ptr(),
data_len: x.len(),
}
}
}
impl Deref for deno_buf {
type Target = [u8];
fn deref(&self) -> &[u8] {
unsafe { std::slice::from_raw_parts(self.data_ptr, self.data_len) }
}
}
impl DerefMut for deno_buf {
fn deref_mut(&mut self) -> &mut [u8] {
unsafe {
std::slice::from_raw_parts_mut(self.data_ptr as *mut u8, self.data_len)
}
}
}
impl AsRef<[u8]> for deno_buf {
fn as_ref(&self) -> &[u8] {
&*self
}
}
impl AsMut<[u8]> for deno_buf {
fn as_mut(&mut self) -> &mut [u8] {
&mut *self
}
}
type DenoRecvCb = unsafe extern "C" fn(
user_data: *mut c_void,
req_id: i32,
buf: deno_buf,
data_buf: deno_buf,
);
#[repr(C)]
pub struct deno_config {
pub shared: deno_buf,
pub recv_cb: DenoRecvCb,
}
extern "C" {
pub fn deno_init();
pub fn deno_v8_version() -> *const c_char;
pub fn deno_set_v8_flags(argc: *mut c_int, argv: *mut *mut c_char);
pub fn deno_new(snapshot: deno_buf, config: deno_config) -> *const isolate;
pub fn deno_delete(i: *const isolate);
pub fn deno_last_exception(i: *const isolate) -> *const c_char;
pub fn deno_check_promise_errors(i: *const isolate);
pub fn deno_respond(
i: *const isolate,
user_data: *mut c_void,
req_id: i32,
buf: deno_buf,
);
pub fn deno_execute(
i: *const isolate,
user_data: *mut c_void,
js_filename: *const c_char,
js_source: *const c_char,
) -> c_int;
}
|
