blob: 502bf8560c8c34b0943d9fa121286f1dbe94e122 (
plain)
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
|
/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-10-10 foxglove RT-Thread Semaphore implementation
*/
#![allow(dead_code)]
use crate::api::*;
use crate::{panic::panic_on_atomic_context, RTTError};
use core::cell::UnsafeCell;
use core::marker::PhantomData;
const RT_WAITING_FOREVER: i32 = -1;
unsafe impl Send for Semaphore {}
unsafe impl Sync for Semaphore {}
pub struct Semaphore {
data: PhantomData<*const UnsafeCell<usize>>,
sem: APIRawSem
}
impl Semaphore {
pub fn new() -> Result<Self, RTTError> {
Self::new_with_name("unknown")
}
pub fn new_with_name(name: &str) -> Result<Self, RTTError> {
panic_on_atomic_context("new_with_name");
semaphore_create(name)
.ok_or(RTTError::OutOfMemory)
.map(|m| Semaphore {
data: Default::default(),
sem: m
})
}
pub fn try_take(&self) -> Result<(), RTTError> {
let m = semaphore_try_take(self.sem);
if !is_eok(m) {
return Err(RTTError::SemaphoreTakeTimeout);
}
Ok(())
}
pub fn take_wait_forever(&self) -> Result<(), RTTError> {
panic_on_atomic_context("sem take_wait_forever");
let ret = semaphore_take(self.sem, RT_WAITING_FOREVER as u32);
if !is_eok(ret) {
return Err(RTTError::SemaphoreTakeTimeout);
}
Ok(())
}
pub fn take(&self, max_wait: i32) -> Result<(), RTTError> {
panic_on_atomic_context("sem take");
let ret = semaphore_take(self.sem, max_wait as u32);
if !is_eok(ret) {
return Err(RTTError::SemaphoreTakeTimeout);
}
Ok(())
}
pub fn release(&self) {
semaphore_release(self.sem);
}
}
impl Drop for Semaphore {
fn drop(&mut self) {
semaphore_delete(self.sem)
}
}
|
