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
use ::{ NifEnv, NifTerm, NifError, NifResult, NifDecoder, NifEncoder };
use ::wrapper::nif_interface::{ self, ErlNifPid };
use ::wrapper::pid;
use std::mem;
#[derive(Clone)]
pub struct NifPid {
c: ErlNifPid
}
impl NifPid {
pub fn as_c_arg(&self) -> &ErlNifPid {
&self.c
}
}
impl<'a> NifDecoder<'a> for NifPid {
fn decode(term: NifTerm<'a>) -> NifResult<NifPid> {
unsafe { pid::get_local_pid(term.get_env().as_c_arg(), term.as_c_arg()) }
.map(|pid| NifPid { c: pid })
.ok_or(NifError::BadArg)
}
}
impl NifEncoder for NifPid {
fn encode<'a>(&self, env: NifEnv<'a>) -> NifTerm<'a> {
unsafe { NifTerm::new(env, pid::make_pid(env.as_c_arg(), &self.c)) }
}
}
impl<'a> NifEnv<'a> {
pub fn pid(self) -> NifPid {
let mut pid: ErlNifPid = unsafe { mem::uninitialized() };
if unsafe { nif_interface::enif_self(self.as_c_arg(), &mut pid) }.is_null() {
panic!("environment is process-independent");
}
NifPid { c: pid }
}
}