freertos_rust/
utils.rs

1use crate::prelude::v1::*;
2use crate::shim::*;
3use crate::base::*;
4
5#[derive(Debug, Copy, Clone)]
6pub struct TypeSizeError {
7    id: usize,
8    c_size: usize,
9    rust_size: usize
10}
11
12/// Perform checks whether the C FreeRTOS shim and Rust agree on the sizes of used types.
13pub fn shim_sanity_check() -> Result<(), TypeSizeError> {
14
15    let checks = [(0, mem::size_of::<FreeRtosVoidPtr>()),
16                  (1, mem::size_of::<FreeRtosCharPtr>()),
17                  (2, mem::size_of::<FreeRtosChar>()),
18
19                  (10, mem::size_of::<FreeRtosBaseType>()),
20                  (11, mem::size_of::<FreeRtosUBaseType>()),
21                  (12, mem::size_of::<FreeRtosTickType>()),
22
23                  (20, mem::size_of::<FreeRtosTaskHandle>()),
24                  (21, mem::size_of::<FreeRtosQueueHandle>()),
25                  (22, mem::size_of::<FreeRtosSemaphoreHandle>()),
26                  (23, mem::size_of::<FreeRtosTaskFunction>()),
27                  (24, mem::size_of::<FreeRtosTimerHandle>()),
28                  (25, mem::size_of::<FreeRtosTimerCallback>()),
29
30                  (30, mem::size_of::<FreeRtosTaskStatusFfi>()),
31                  (31, mem::size_of::<FreeRtosTaskState>()),
32                  (32, mem::size_of::<FreeRtosUnsignedLong>()),
33                  (33, mem::size_of::<FreeRtosUnsignedShort>())
34                  ];
35
36    for check in &checks {
37        let c_size = unsafe { freertos_rs_sizeof(check.0) };
38
39        if c_size != check.1 as u8 {
40            return Err(TypeSizeError {
41                id: check.0 as usize,
42                c_size: c_size as usize,
43                rust_size: check.1
44            });
45        }
46    }
47
48    Ok(())
49}
50
51pub unsafe fn str_from_c_string(str: *const u8) -> Result<String, FreeRtosError> {
52    let mut buf = Vec::new();
53
54    let mut p = str;
55    loop {
56        if *p == 0 {
57            break;
58        }
59        buf.push(*p);
60        p = p.offset(1);
61    }
62
63    match String::from_utf8(buf) {
64        Ok(s) => Ok(s),
65        Err(_) => Err(FreeRtosError::StringConversionError),
66    }
67}
freertos_rust/utils.rs

freertos_rust/
utils.rs
