arceos_posix_api/
utils.rs

1#![allow(dead_code)]
2#![allow(unused_macros)]
3
4use axerrno::{LinuxError, LinuxResult};
5use core::ffi::{CStr, c_char};
6
7/// Convert a C string to a Rust string
8pub fn char_ptr_to_str<'a>(str: *const c_char) -> LinuxResult<&'a str> {
9    if str.is_null() {
10        Err(LinuxError::EFAULT)
11    } else {
12        let str = str as *const _;
13        unsafe { CStr::from_ptr(str) }
14            .to_str()
15            .map_err(|_| LinuxError::EINVAL)
16    }
17}
18
19pub fn check_null_ptr<T>(ptr: *const T) -> LinuxResult {
20    if ptr.is_null() {
21        Err(LinuxError::EFAULT)
22    } else {
23        Ok(())
24    }
25}
26
27pub fn check_null_mut_ptr<T>(ptr: *mut T) -> LinuxResult {
28    if ptr.is_null() {
29        Err(LinuxError::EFAULT)
30    } else {
31        Ok(())
32    }
33}
34
35macro_rules! syscall_body {
36    ($fn: ident, $($stmt: tt)*) => {{
37        #[allow(clippy::redundant_closure_call)]
38        let res = (|| -> axerrno::LinuxResult<_> { $($stmt)* })();
39        match res {
40            Ok(_) | Err(axerrno::LinuxError::EAGAIN) => debug!(concat!(stringify!($fn), " => {:?}"),  res),
41            Err(_) => info!(concat!(stringify!($fn), " => {:?}"), res),
42        }
43        match res {
44            Ok(v) => v as _,
45            Err(e) => {
46                -e.code() as _
47            }
48        }
49    }};
50}
51
52macro_rules! syscall_body_no_debug {
53    ($($stmt: tt)*) => {{
54        #[allow(clippy::redundant_closure_call)]
55        let res = (|| -> axerrno::LinuxResult<_> { $($stmt)* })();
56        match res {
57            Ok(v) => v as _,
58            Err(e) => {
59                -e.code() as _
60            }
61        }
62    }};
63}
arceos_posix_api/utils.rs

arceos_posix_api/
utils.rs
