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Merge branch 'sys-mman-docs' into 'master'

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Add docs for sys/mman.h, make mremap pub

See merge request redox-os/relibc!543
This commit is contained in:
Jeremy Soller
2024-10-31 21:43:21 +00:00
parent eb37133e01 6c1ccd161a
commit d56c4dad2c
1 changed files with 31 additions and 15 deletions
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src/header/sys_mman/mod.rs
+31 -15
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@@ -1,3 +1,7 @@
//! `sys/mman.h` implementation.
//!
//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_mman.h.html>.
use crate::{
c_str::{CStr, CString},
error::{Errno, ResultExt},
@@ -44,16 +48,27 @@ pub const POSIX_MADV_SEQUENTIAL: c_int = 2;
pub const POSIX_MADV_WILLNEED: c_int = 3;
pub const POSIX_MADV_WONTNEED: c_int = 4;
/// Non-POSIX, see <https://www.man7.org/linux/man-pages/man2/madvise.2.html>.
#[no_mangle]
pub unsafe extern "C" fn madvise(addr: *mut c_void, len: size_t, flags: c_int) -> c_int {
Sys::madvise(addr, len, flags)
.map(|()| 0)
.or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mlock.html>.
#[no_mangle]
pub unsafe extern "C" fn mlock(addr: *const c_void, len: usize) -> c_int {
Sys::mlock(addr, len).map(|()| 0).or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mlockall.html>.
#[no_mangle]
pub unsafe extern "C" fn mlockall(flags: c_int) -> c_int {
Sys::mlockall(flags).map(|()| 0).or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mmap.html>.
#[no_mangle]
pub unsafe extern "C" fn mmap(
addr: *mut c_void,
@@ -72,8 +87,17 @@ pub unsafe extern "C" fn mmap(
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mprotect.html>.
#[no_mangle]
unsafe extern "C" fn mremap(
pub unsafe extern "C" fn mprotect(addr: *mut c_void, len: size_t, prot: c_int) -> c_int {
Sys::mprotect(addr, len, prot)
.map(|()| 0)
.or_minus_one_errno()
}
/// Non-POSIX, see <https://www.man7.org/linux/man-pages/man2/mremap.2.html>.
#[no_mangle]
pub unsafe extern "C" fn mremap(
old_address: *mut c_void,
old_size: usize,
new_size: usize,
@@ -90,13 +114,7 @@ unsafe extern "C" fn mremap(
}
}
#[no_mangle]
pub unsafe extern "C" fn mprotect(addr: *mut c_void, len: size_t, prot: c_int) -> c_int {
Sys::mprotect(addr, len, prot)
.map(|()| 0)
.or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/msync.html>.
#[no_mangle]
pub unsafe extern "C" fn msync(addr: *mut c_void, len: size_t, flags: c_int) -> c_int {
Sys::msync(addr, len, flags)
@@ -104,28 +122,24 @@ pub unsafe extern "C" fn msync(addr: *mut c_void, len: size_t, flags: c_int) ->
.or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mlock.html>.
#[no_mangle]
pub unsafe extern "C" fn munlock(addr: *const c_void, len: usize) -> c_int {
Sys::munlock(addr, len).map(|()| 0).or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mlockall.html>.
#[no_mangle]
pub unsafe extern "C" fn munlockall() -> c_int {
Sys::munlockall().map(|()| 0).or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/munmap.html>.
#[no_mangle]
pub unsafe extern "C" fn munmap(addr: *mut c_void, len: size_t) -> c_int {
Sys::munmap(addr, len).map(|()| 0).or_minus_one_errno()
}
#[no_mangle]
pub unsafe extern "C" fn madvise(addr: *mut c_void, len: size_t, flags: c_int) -> c_int {
Sys::madvise(addr, len, flags)
.map(|()| 0)
.or_minus_one_errno()
}
#[cfg(target_os = "linux")]
static SHM_PATH: &'static [u8] = b"/dev/shm/";
@@ -152,12 +166,14 @@ unsafe fn shm_path(name: *const c_char) -> CString {
CString::from_vec_unchecked(path)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/shm_open.html>.
#[no_mangle]
pub unsafe extern "C" fn shm_open(name: *const c_char, oflag: c_int, mode: mode_t) -> c_int {
let path = shm_path(name);
fcntl::open(path.as_ptr(), oflag, mode)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/shm_unlink.html>.
#[no_mangle]
pub unsafe extern "C" fn shm_unlink(name: *const c_char) -> c_int {
let path = shm_path(name);