diff options
Diffstat (limited to 'rust/qemu-api/src/device_class.rs')
| -rw-r--r-- | rust/qemu-api/src/device_class.rs | 114 |
1 files changed, 30 insertions, 84 deletions
diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_class.rs index 1ea95beb78..0ba798d3e3 100644 --- a/rust/qemu-api/src/device_class.rs +++ b/rust/qemu-api/src/device_class.rs @@ -2,127 +2,73 @@ // Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org> // SPDX-License-Identifier: GPL-2.0-or-later -use std::sync::OnceLock; +use std::ffi::CStr; -use crate::bindings::Property; +use crate::bindings; #[macro_export] macro_rules! device_class_init { ($func:ident, props => $props:ident, realize_fn => $realize_fn:expr, legacy_reset_fn => $legacy_reset_fn:expr, vmsd => $vmsd:ident$(,)*) => { - #[no_mangle] pub unsafe extern "C" fn $func( klass: *mut $crate::bindings::ObjectClass, - _: *mut ::core::ffi::c_void, + _: *mut ::std::os::raw::c_void, ) { let mut dc = ::core::ptr::NonNull::new(klass.cast::<$crate::bindings::DeviceClass>()).unwrap(); - dc.as_mut().realize = $realize_fn; - dc.as_mut().vmsd = &$vmsd; - $crate::bindings::device_class_set_legacy_reset(dc.as_mut(), $legacy_reset_fn); - $crate::bindings::device_class_set_props(dc.as_mut(), $props.as_mut_ptr()); + unsafe { + dc.as_mut().realize = $realize_fn; + dc.as_mut().vmsd = &$vmsd; + $crate::bindings::device_class_set_legacy_reset(dc.as_mut(), $legacy_reset_fn); + $crate::bindings::device_class_set_props(dc.as_mut(), $props.as_ptr()); + } } }; } #[macro_export] macro_rules! define_property { - ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr, default = $defval:expr$(,)*) => { + ($name:expr, $state:ty, $field:ident, $prop:expr, $type:expr, default = $defval:expr$(,)*) => { $crate::bindings::Property { - name: { - #[used] - static _TEMP: &::core::ffi::CStr = $name; - _TEMP.as_ptr() - }, + // use associated function syntax for type checking + name: ::std::ffi::CStr::as_ptr($name), info: $prop, - offset: ::core::mem::offset_of!($state, $field) - .try_into() - .expect("Could not fit offset value to type"), - bitnr: 0, - bitmask: 0, + offset: $crate::offset_of!($state, $field) as isize, set_default: true, - defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval.into() }, - arrayoffset: 0, - arrayinfo: ::core::ptr::null(), - arrayfieldsize: 0, - link_type: ::core::ptr::null(), + defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval as u64 }, + ..$crate::zeroable::Zeroable::ZERO } }; - ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr$(,)*) => { + ($name:expr, $state:ty, $field:ident, $prop:expr, $type:expr$(,)*) => { $crate::bindings::Property { - name: { - #[used] - static _TEMP: &::core::ffi::CStr = $name; - _TEMP.as_ptr() - }, + // use associated function syntax for type checking + name: ::std::ffi::CStr::as_ptr($name), info: $prop, - offset: ::core::mem::offset_of!($state, $field) - .try_into() - .expect("Could not fit offset value to type"), - bitnr: 0, - bitmask: 0, + offset: $crate::offset_of!($state, $field) as isize, set_default: false, - defval: $crate::bindings::Property__bindgen_ty_1 { i: 0 }, - arrayoffset: 0, - arrayinfo: ::core::ptr::null(), - arrayfieldsize: 0, - link_type: ::core::ptr::null(), + ..$crate::zeroable::Zeroable::ZERO } }; } -#[repr(C)] -pub struct Properties<const N: usize>(pub OnceLock<[Property; N]>, pub fn() -> [Property; N]); - -impl<const N: usize> Properties<N> { - pub fn as_mut_ptr(&mut self) -> *mut Property { - _ = self.0.get_or_init(self.1); - self.0.get_mut().unwrap().as_mut_ptr() - } -} - #[macro_export] macro_rules! declare_properties { ($ident:ident, $($prop:expr),*$(,)*) => { - - const fn _calc_prop_len() -> usize { + pub static $ident: [$crate::bindings::Property; { let mut len = 1; $({ _ = stringify!($prop); len += 1; })* len - } - const PROP_LEN: usize = _calc_prop_len(); - - fn _make_properties() -> [$crate::bindings::Property; PROP_LEN] { - [ - $($prop),*, - unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Property>::zeroed().assume_init() }, - ] - } - - #[no_mangle] - pub static mut $ident: $crate::device_class::Properties<PROP_LEN> = $crate::device_class::Properties(::std::sync::OnceLock::new(), _make_properties); + }] = [ + $($prop),*, + $crate::zeroable::Zeroable::ZERO, + ]; }; } -#[macro_export] -macro_rules! vm_state_description { - ($(#[$outer:meta])* - $name:ident, - $(name: $vname:expr,)* - $(unmigratable: $um_val:expr,)* - ) => { - #[used] - $(#[$outer])* - pub static $name: $crate::bindings::VMStateDescription = $crate::bindings::VMStateDescription { - $(name: { - #[used] - static VMSTATE_NAME: &::core::ffi::CStr = $vname; - $vname.as_ptr() - },)* - unmigratable: true, - ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::VMStateDescription>::zeroed().assume_init() } - }; - } -} +// workaround until we can use --generate-cstr in bindgen. +pub const TYPE_DEVICE: &CStr = + unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_DEVICE) }; +pub const TYPE_SYS_BUS_DEVICE: &CStr = + unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_SYS_BUS_DEVICE) }; |