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#[cfg(all(unix, not(target_os = "redox"), not(target_os = "android")))]

pub(crate) use _posixshmem::module_def;

#[cfg(all(unix, not(target_os = "redox"), not(target_os = "android")))]

#[pymodule]

mod _posixshmem {

use alloc::ffi::CString;

use crate::{

common::os::errno_io_error,

vm::{

FromArgs, PyResult, VirtualMachine, builtins::PyUtf8StrRef, convert::IntoPyException,

};

#[derive(FromArgs)]

struct ShmOpenArgs {

#[pyarg(any)]

name: PyUtf8StrRef,

#[pyarg(any)]

flags: libc::c_int,

#[pyarg(any, default = 0o600)]

mode: libc::mode_t,

}

#[pyfunction]

fn shm_open(args: ShmOpenArgs, vm: &VirtualMachine) -> PyResult<libc::c_int> {

let name = CString::new(args.name.as_str()).map_err(|e| e.into_pyexception(vm))?;

let mode: libc::c_uint = args.mode as _;

#[cfg(target_os = "freebsd")]

let mode = mode.try_into().unwrap();

// SAFETY: `name` is a NUL-terminated string and `shm_open` does not write through it.

let fd = unsafe { libc::shm_open(name.as_ptr(), args.flags, mode) };

if fd == -1 {

Err(errno_io_error().into_pyexception(vm))

} else {

Ok(fd)

}

#[pyfunction]

fn shm_unlink(name: PyUtf8StrRef, vm: &VirtualMachine) -> PyResult<()> {

let name = CString::new(name.as_str()).map_err(|e| e.into_pyexception(vm))?;

// SAFETY: `name` is a valid NUL-terminated string and `shm_unlink` only reads it.

let ret = unsafe { libc::shm_unlink(name.as_ptr()) };

if ret == -1 {

Err(errno_io_error().into_pyexception(vm))

} else {

Ok(())

}

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