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Diffstat (limited to 'rust/qemu-api/src/vmstate.rs')
| -rw-r--r-- | rust/qemu-api/src/vmstate.rs | 593 |
1 files changed, 0 insertions, 593 deletions
diff --git a/rust/qemu-api/src/vmstate.rs b/rust/qemu-api/src/vmstate.rs deleted file mode 100644 index 1b2b12e..0000000 --- a/rust/qemu-api/src/vmstate.rs +++ /dev/null @@ -1,593 +0,0 @@ -// Copyright 2024, Linaro Limited -// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org> -// SPDX-License-Identifier: GPL-2.0-or-later - -//! Helper macros to declare migration state for device models. -//! -//! This module includes four families of macros: -//! -//! * [`vmstate_unused!`](crate::vmstate_unused) and -//! [`vmstate_of!`](crate::vmstate_of), which are used to express the -//! migration format for a struct. This is based on the [`VMState`] trait, -//! which is defined by all migrateable types. -//! -//! * [`impl_vmstate_forward`](crate::impl_vmstate_forward) and -//! [`impl_vmstate_bitsized`](crate::impl_vmstate_bitsized), which help with -//! the definition of the [`VMState`] trait (respectively for transparent -//! structs and for `bilge`-defined types) -//! -//! * helper macros to declare a device model state struct, in particular -//! [`vmstate_subsections`](crate::vmstate_subsections) and -//! [`vmstate_fields`](crate::vmstate_fields). -//! -//! * direct equivalents to the C macros declared in -//! `include/migration/vmstate.h`. These are not type-safe and only provide -//! functionality that is missing from `vmstate_of!`. - -use core::{marker::PhantomData, mem, ptr::NonNull}; -use std::os::raw::{c_int, c_void}; - -pub use crate::bindings::{VMStateDescription, VMStateField}; -use crate::{ - bindings::VMStateFlags, callbacks::FnCall, prelude::*, qom::Owned, zeroable::Zeroable, -}; - -/// This macro is used to call a function with a generic argument bound -/// to the type of a field. The function must take a -/// [`PhantomData`]`<T>` argument; `T` is the type of -/// field `$field` in the `$typ` type. -/// -/// # Examples -/// -/// ``` -/// # use qemu_api::call_func_with_field; -/// # use core::marker::PhantomData; -/// const fn size_of_field<T>(_: PhantomData<T>) -> usize { -/// std::mem::size_of::<T>() -/// } -/// -/// struct Foo { -/// x: u16, -/// }; -/// // calls size_of_field::<u16>() -/// assert_eq!(call_func_with_field!(size_of_field, Foo, x), 2); -/// ``` -#[macro_export] -macro_rules! call_func_with_field { - // Based on the answer by user steffahn (Frank Steffahn) at - // https://users.rust-lang.org/t/inferring-type-of-field/122857 - // and used under MIT license - ($func:expr, $typ:ty, $($field:tt).+) => { - $func(loop { - #![allow(unreachable_code)] - const fn phantom__<T>(_: &T) -> ::core::marker::PhantomData<T> { ::core::marker::PhantomData } - // Unreachable code is exempt from checks on uninitialized values. - // Use that trick to infer the type of this PhantomData. - break ::core::marker::PhantomData; - break phantom__(&{ let value__: $typ; value__.$($field).+ }); - }) - }; -} - -/// Workaround for lack of `const_refs_static`: references to global variables -/// can be included in a `static`, but not in a `const`; unfortunately, this -/// is exactly what would go in the `VMStateField`'s `info` member. -/// -/// This enum contains the contents of the `VMStateField`'s `info` member, -/// but as an `enum` instead of a pointer. -#[allow(non_camel_case_types)] -pub enum VMStateFieldType { - null, - vmstate_info_bool, - vmstate_info_int8, - vmstate_info_int16, - vmstate_info_int32, - vmstate_info_int64, - vmstate_info_uint8, - vmstate_info_uint16, - vmstate_info_uint32, - vmstate_info_uint64, - vmstate_info_timer, -} - -/// Workaround for lack of `const_refs_static`. Converts a `VMStateFieldType` -/// to a `*const VMStateInfo`, for inclusion in a `VMStateField`. -#[macro_export] -macro_rules! info_enum_to_ref { - ($e:expr) => { - unsafe { - match $e { - $crate::vmstate::VMStateFieldType::null => ::core::ptr::null(), - $crate::vmstate::VMStateFieldType::vmstate_info_bool => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_bool) - } - $crate::vmstate::VMStateFieldType::vmstate_info_int8 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_int8) - } - $crate::vmstate::VMStateFieldType::vmstate_info_int16 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_int16) - } - $crate::vmstate::VMStateFieldType::vmstate_info_int32 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_int32) - } - $crate::vmstate::VMStateFieldType::vmstate_info_int64 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_int64) - } - $crate::vmstate::VMStateFieldType::vmstate_info_uint8 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_uint8) - } - $crate::vmstate::VMStateFieldType::vmstate_info_uint16 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_uint16) - } - $crate::vmstate::VMStateFieldType::vmstate_info_uint32 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_uint32) - } - $crate::vmstate::VMStateFieldType::vmstate_info_uint64 => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_uint64) - } - $crate::vmstate::VMStateFieldType::vmstate_info_timer => { - ::core::ptr::addr_of!($crate::bindings::vmstate_info_timer) - } - } - } - }; -} - -/// A trait for types that can be included in a device's migration stream. It -/// provides the base contents of a `VMStateField` (minus the name and offset). -/// -/// # Safety -/// -/// The contents of this trait go straight into structs that are parsed by C -/// code and used to introspect into other structs. Generally, you don't need -/// to implement it except via macros that do it for you, such as -/// `impl_vmstate_bitsized!`. -pub unsafe trait VMState { - /// The `info` member of a `VMStateField` is a pointer and as such cannot - /// yet be included in the [`BASE`](VMState::BASE) associated constant; - /// this is only allowed by Rust 1.83.0 and newer. For now, include the - /// member as an enum which is stored in a separate constant. - const SCALAR_TYPE: VMStateFieldType = VMStateFieldType::null; - - /// The base contents of a `VMStateField` (minus the name and offset) for - /// the type that is implementing the trait. - const BASE: VMStateField; - - /// A flag that is added to another field's `VMStateField` to specify the - /// length's type in a variable-sized array. If this is not a supported - /// type for the length (i.e. if it is not `u8`, `u16`, `u32`), using it - /// in a call to [`vmstate_of!`](crate::vmstate_of) will cause a - /// compile-time error. - const VARRAY_FLAG: VMStateFlags = { - panic!("invalid type for variable-sized array"); - }; -} - -/// Internal utility function to retrieve a type's `VMStateFieldType`; -/// used by [`vmstate_of!`](crate::vmstate_of). -pub const fn vmstate_scalar_type<T: VMState>(_: PhantomData<T>) -> VMStateFieldType { - T::SCALAR_TYPE -} - -/// Internal utility function to retrieve a type's `VMStateField`; -/// used by [`vmstate_of!`](crate::vmstate_of). -pub const fn vmstate_base<T: VMState>(_: PhantomData<T>) -> VMStateField { - T::BASE -} - -/// Internal utility function to retrieve a type's `VMStateFlags` when it -/// is used as the element count of a `VMSTATE_VARRAY`; used by -/// [`vmstate_of!`](crate::vmstate_of). -pub const fn vmstate_varray_flag<T: VMState>(_: PhantomData<T>) -> VMStateFlags { - T::VARRAY_FLAG -} - -/// Return the `VMStateField` for a field of a struct. The field must be -/// visible in the current scope. -/// -/// Only a limited set of types is supported out of the box: -/// * scalar types (integer and `bool`) -/// * the C struct `QEMUTimer` -/// * a transparent wrapper for any of the above (`Cell`, `UnsafeCell`, -/// [`BqlCell`], [`BqlRefCell`] -/// * a raw pointer to any of the above -/// * a `NonNull` pointer, a `Box` or an [`Owned`] for any of the above -/// * an array of any of the above -/// -/// In order to support other types, the trait `VMState` must be implemented -/// for them. The macros -/// [`impl_vmstate_bitsized!`](crate::impl_vmstate_bitsized) -/// and [`impl_vmstate_forward!`](crate::impl_vmstate_forward) help with this. -#[macro_export] -macro_rules! vmstate_of { - ($struct_name:ty, $field_name:ident $([0 .. $num:ident $(* $factor:expr)?])? $(,)?) => { - $crate::bindings::VMStateField { - name: ::core::concat!(::core::stringify!($field_name), "\0") - .as_bytes() - .as_ptr() as *const ::std::os::raw::c_char, - offset: $crate::offset_of!($struct_name, $field_name), - $(num_offset: $crate::offset_of!($struct_name, $num),)? - // The calls to `call_func_with_field!` are the magic that - // computes most of the VMStateField from the type of the field. - info: $crate::info_enum_to_ref!($crate::call_func_with_field!( - $crate::vmstate::vmstate_scalar_type, - $struct_name, - $field_name - )), - ..$crate::call_func_with_field!( - $crate::vmstate::vmstate_base, - $struct_name, - $field_name - )$(.with_varray_flag($crate::call_func_with_field!( - $crate::vmstate::vmstate_varray_flag, - $struct_name, - $num)) - $(.with_varray_multiply($factor))?)? - } - }; -} - -impl VMStateFlags { - const VMS_VARRAY_FLAGS: VMStateFlags = VMStateFlags( - VMStateFlags::VMS_VARRAY_INT32.0 - | VMStateFlags::VMS_VARRAY_UINT8.0 - | VMStateFlags::VMS_VARRAY_UINT16.0 - | VMStateFlags::VMS_VARRAY_UINT32.0, - ); -} - -// Add a couple builder-style methods to VMStateField, allowing -// easy derivation of VMStateField constants from other types. -impl VMStateField { - #[must_use] - pub const fn with_version_id(mut self, version_id: i32) -> Self { - assert!(version_id >= 0); - self.version_id = version_id; - self - } - - #[must_use] - pub const fn with_array_flag(mut self, num: usize) -> Self { - assert!(num <= 0x7FFF_FFFFusize); - assert!((self.flags.0 & VMStateFlags::VMS_ARRAY.0) == 0); - assert!((self.flags.0 & VMStateFlags::VMS_VARRAY_FLAGS.0) == 0); - if (self.flags.0 & VMStateFlags::VMS_POINTER.0) != 0 { - self.flags = VMStateFlags(self.flags.0 & !VMStateFlags::VMS_POINTER.0); - self.flags = VMStateFlags(self.flags.0 | VMStateFlags::VMS_ARRAY_OF_POINTER.0); - // VMS_ARRAY_OF_POINTER flag stores the size of pointer. - // FIXME: *const, *mut, NonNull and Box<> have the same size as usize. - // Resize if more smart pointers are supported. - self.size = std::mem::size_of::<usize>(); - } - self.flags = VMStateFlags(self.flags.0 & !VMStateFlags::VMS_SINGLE.0); - self.flags = VMStateFlags(self.flags.0 | VMStateFlags::VMS_ARRAY.0); - self.num = num as i32; - self - } - - #[must_use] - pub const fn with_pointer_flag(mut self) -> Self { - assert!((self.flags.0 & VMStateFlags::VMS_POINTER.0) == 0); - self.flags = VMStateFlags(self.flags.0 | VMStateFlags::VMS_POINTER.0); - self - } - - #[must_use] - pub const fn with_varray_flag_unchecked(mut self, flag: VMStateFlags) -> VMStateField { - self.flags = VMStateFlags(self.flags.0 & !VMStateFlags::VMS_ARRAY.0); - self.flags = VMStateFlags(self.flags.0 | flag.0); - self.num = 0; // varray uses num_offset instead of num. - self - } - - #[must_use] - #[allow(unused_mut)] - pub const fn with_varray_flag(mut self, flag: VMStateFlags) -> VMStateField { - assert!((self.flags.0 & VMStateFlags::VMS_ARRAY.0) != 0); - self.with_varray_flag_unchecked(flag) - } - - #[must_use] - pub const fn with_varray_multiply(mut self, num: u32) -> VMStateField { - assert!(num <= 0x7FFF_FFFFu32); - self.flags = VMStateFlags(self.flags.0 | VMStateFlags::VMS_MULTIPLY_ELEMENTS.0); - self.num = num as i32; - self - } -} - -/// This macro can be used (by just passing it a type) to forward the `VMState` -/// trait to the first field of a tuple. This is a workaround for lack of -/// support of nested [`offset_of`](core::mem::offset_of) until Rust 1.82.0. -/// -/// # Examples -/// -/// ``` -/// # use qemu_api::impl_vmstate_forward; -/// pub struct Fifo([u8; 16]); -/// impl_vmstate_forward!(Fifo); -/// ``` -#[macro_export] -macro_rules! impl_vmstate_forward { - // This is similar to impl_vmstate_transparent below, but it - // uses the same trick as vmstate_of! to obtain the type of - // the first field of the tuple - ($tuple:ty) => { - unsafe impl $crate::vmstate::VMState for $tuple { - const SCALAR_TYPE: $crate::vmstate::VMStateFieldType = - $crate::call_func_with_field!($crate::vmstate::vmstate_scalar_type, $tuple, 0); - const BASE: $crate::bindings::VMStateField = - $crate::call_func_with_field!($crate::vmstate::vmstate_base, $tuple, 0); - } - }; -} - -// Transparent wrappers: just use the internal type - -macro_rules! impl_vmstate_transparent { - ($type:ty where $base:tt: VMState $($where:tt)*) => { - unsafe impl<$base> VMState for $type where $base: VMState $($where)* { - const SCALAR_TYPE: VMStateFieldType = <$base as VMState>::SCALAR_TYPE; - const BASE: VMStateField = VMStateField { - size: mem::size_of::<$type>(), - ..<$base as VMState>::BASE - }; - const VARRAY_FLAG: VMStateFlags = <$base as VMState>::VARRAY_FLAG; - } - }; -} - -impl_vmstate_transparent!(std::cell::Cell<T> where T: VMState); -impl_vmstate_transparent!(std::cell::UnsafeCell<T> where T: VMState); -impl_vmstate_transparent!(std::pin::Pin<T> where T: VMState); -impl_vmstate_transparent!(crate::cell::BqlCell<T> where T: VMState); -impl_vmstate_transparent!(crate::cell::BqlRefCell<T> where T: VMState); -impl_vmstate_transparent!(crate::cell::Opaque<T> where T: VMState); - -#[macro_export] -macro_rules! impl_vmstate_bitsized { - ($type:ty) => { - unsafe impl $crate::vmstate::VMState for $type { - const SCALAR_TYPE: $crate::vmstate::VMStateFieldType = - <<<$type as ::bilge::prelude::Bitsized>::ArbitraryInt - as ::bilge::prelude::Number>::UnderlyingType - as $crate::vmstate::VMState>::SCALAR_TYPE; - const BASE: $crate::bindings::VMStateField = - <<<$type as ::bilge::prelude::Bitsized>::ArbitraryInt - as ::bilge::prelude::Number>::UnderlyingType - as $crate::vmstate::VMState>::BASE; - const VARRAY_FLAG: $crate::bindings::VMStateFlags = - <<<$type as ::bilge::prelude::Bitsized>::ArbitraryInt - as ::bilge::prelude::Number>::UnderlyingType - as $crate::vmstate::VMState>::VARRAY_FLAG; - } - }; -} - -// Scalar types using predefined VMStateInfos - -macro_rules! impl_vmstate_scalar { - ($info:ident, $type:ty$(, $varray_flag:ident)?) => { - unsafe impl VMState for $type { - const SCALAR_TYPE: VMStateFieldType = VMStateFieldType::$info; - const BASE: VMStateField = VMStateField { - size: mem::size_of::<$type>(), - flags: VMStateFlags::VMS_SINGLE, - ..Zeroable::ZERO - }; - $(const VARRAY_FLAG: VMStateFlags = VMStateFlags::$varray_flag;)? - } - }; -} - -impl_vmstate_scalar!(vmstate_info_bool, bool); -impl_vmstate_scalar!(vmstate_info_int8, i8); -impl_vmstate_scalar!(vmstate_info_int16, i16); -impl_vmstate_scalar!(vmstate_info_int32, i32); -impl_vmstate_scalar!(vmstate_info_int64, i64); -impl_vmstate_scalar!(vmstate_info_uint8, u8, VMS_VARRAY_UINT8); -impl_vmstate_scalar!(vmstate_info_uint16, u16, VMS_VARRAY_UINT16); -impl_vmstate_scalar!(vmstate_info_uint32, u32, VMS_VARRAY_UINT32); -impl_vmstate_scalar!(vmstate_info_uint64, u64); -impl_vmstate_scalar!(vmstate_info_timer, crate::timer::Timer); - -// Pointer types using the underlying type's VMState plus VMS_POINTER -// Note that references are not supported, though references to cells -// could be allowed. - -macro_rules! impl_vmstate_pointer { - ($type:ty where $base:tt: VMState $($where:tt)*) => { - unsafe impl<$base> VMState for $type where $base: VMState $($where)* { - const SCALAR_TYPE: VMStateFieldType = <T as VMState>::SCALAR_TYPE; - const BASE: VMStateField = <$base as VMState>::BASE.with_pointer_flag(); - } - }; -} - -impl_vmstate_pointer!(*const T where T: VMState); -impl_vmstate_pointer!(*mut T where T: VMState); -impl_vmstate_pointer!(NonNull<T> where T: VMState); - -// Unlike C pointers, Box is always non-null therefore there is no need -// to specify VMS_ALLOC. -impl_vmstate_pointer!(Box<T> where T: VMState); -impl_vmstate_pointer!(Owned<T> where T: VMState + ObjectType); - -// Arrays using the underlying type's VMState plus -// VMS_ARRAY/VMS_ARRAY_OF_POINTER - -unsafe impl<T: VMState, const N: usize> VMState for [T; N] { - const SCALAR_TYPE: VMStateFieldType = <T as VMState>::SCALAR_TYPE; - const BASE: VMStateField = <T as VMState>::BASE.with_array_flag(N); -} - -#[doc(alias = "VMSTATE_UNUSED")] -#[macro_export] -macro_rules! vmstate_unused { - ($size:expr) => {{ - $crate::bindings::VMStateField { - name: $crate::c_str!("unused").as_ptr(), - size: $size, - info: unsafe { ::core::ptr::addr_of!($crate::bindings::vmstate_info_unused_buffer) }, - flags: $crate::bindings::VMStateFlags::VMS_BUFFER, - ..$crate::zeroable::Zeroable::ZERO - } - }}; -} - -// FIXME: including the `vmsd` field in a `const` is not possible without -// the const_refs_static feature (stabilized in Rust 1.83.0). Without it, -// it is not possible to use VMS_STRUCT in a transparent manner using -// `vmstate_of!`. While VMSTATE_CLOCK can at least try to be type-safe, -// VMSTATE_STRUCT includes $type only for documentation purposes; it -// is checked against $field_name and $struct_name, but not against $vmsd -// which is what really would matter. -#[doc(alias = "VMSTATE_STRUCT")] -#[macro_export] -macro_rules! vmstate_struct { - ($struct_name:ty, $field_name:ident $([0 .. $num:ident $(* $factor:expr)?])?, $vmsd:expr, $type:ty $(,)?) => { - $crate::bindings::VMStateField { - name: ::core::concat!(::core::stringify!($field_name), "\0") - .as_bytes() - .as_ptr() as *const ::std::os::raw::c_char, - $(num_offset: $crate::offset_of!($struct_name, $num),)? - offset: { - $crate::assert_field_type!($struct_name, $field_name, $type $(, num = $num)?); - $crate::offset_of!($struct_name, $field_name) - }, - size: ::core::mem::size_of::<$type>(), - flags: $crate::bindings::VMStateFlags::VMS_STRUCT, - vmsd: $vmsd, - ..$crate::zeroable::Zeroable::ZERO - } $(.with_varray_flag_unchecked( - $crate::call_func_with_field!( - $crate::vmstate::vmstate_varray_flag, - $struct_name, - $num - ) - ) - $(.with_varray_multiply($factor))?)? - }; -} - -#[doc(alias = "VMSTATE_CLOCK")] -#[macro_export] -macro_rules! vmstate_clock { - ($struct_name:ty, $field_name:ident) => {{ - $crate::bindings::VMStateField { - name: ::core::concat!(::core::stringify!($field_name), "\0") - .as_bytes() - .as_ptr() as *const ::std::os::raw::c_char, - offset: { - $crate::assert_field_type!( - $struct_name, - $field_name, - $crate::qom::Owned<$crate::qdev::Clock> - ); - $crate::offset_of!($struct_name, $field_name) - }, - size: ::core::mem::size_of::<*const $crate::qdev::Clock>(), - flags: $crate::bindings::VMStateFlags( - $crate::bindings::VMStateFlags::VMS_STRUCT.0 - | $crate::bindings::VMStateFlags::VMS_POINTER.0, - ), - vmsd: unsafe { ::core::ptr::addr_of!($crate::bindings::vmstate_clock) }, - ..$crate::zeroable::Zeroable::ZERO - } - }}; -} - -/// Helper macro to declare a list of -/// ([`VMStateField`](`crate::bindings::VMStateField`)) into a static and return -/// a pointer to the array of values it created. -#[macro_export] -macro_rules! vmstate_fields { - ($($field:expr),*$(,)*) => {{ - static _FIELDS: &[$crate::bindings::VMStateField] = &[ - $($field),*, - $crate::bindings::VMStateField { - flags: $crate::bindings::VMStateFlags::VMS_END, - ..$crate::zeroable::Zeroable::ZERO - } - ]; - _FIELDS.as_ptr() - }} -} - -pub extern "C" fn rust_vms_test_field_exists<T, F: for<'a> FnCall<(&'a T, u8), bool>>( - opaque: *mut c_void, - version_id: c_int, -) -> bool { - let owner: &T = unsafe { &*(opaque.cast::<T>()) }; - let version: u8 = version_id.try_into().unwrap(); - // SAFETY: the opaque was passed as a reference to `T`. - F::call((owner, version)) -} - -pub type VMSFieldExistCb = unsafe extern "C" fn( - opaque: *mut std::os::raw::c_void, - version_id: std::os::raw::c_int, -) -> bool; - -#[doc(alias = "VMSTATE_VALIDATE")] -#[macro_export] -macro_rules! vmstate_validate { - ($struct_name:ty, $test_name:expr, $test_fn:expr $(,)?) => { - $crate::bindings::VMStateField { - name: ::std::ffi::CStr::as_ptr($test_name), - field_exists: { - const fn test_cb_builder__< - T, - F: for<'a> $crate::callbacks::FnCall<(&'a T, u8), bool>, - >( - _phantom: ::core::marker::PhantomData<F>, - ) -> $crate::vmstate::VMSFieldExistCb { - let _: () = F::ASSERT_IS_SOME; - $crate::vmstate::rust_vms_test_field_exists::<T, F> - } - - const fn phantom__<T>(_: &T) -> ::core::marker::PhantomData<T> { - ::core::marker::PhantomData - } - Some(test_cb_builder__::<$struct_name, _>(phantom__(&$test_fn))) - }, - flags: $crate::bindings::VMStateFlags( - $crate::bindings::VMStateFlags::VMS_MUST_EXIST.0 - | $crate::bindings::VMStateFlags::VMS_ARRAY.0, - ), - num: 0, // 0 elements: no data, only run test_fn callback - ..$crate::zeroable::Zeroable::ZERO - } - }; -} - -/// A transparent wrapper type for the `subsections` field of -/// [`VMStateDescription`]. -/// -/// This is necessary to be able to declare subsection descriptions as statics, -/// because the only way to implement `Sync` for a foreign type (and `*const` -/// pointers are foreign types in Rust) is to create a wrapper struct and -/// `unsafe impl Sync` for it. -/// -/// This struct is used in the -/// [`vm_state_subsections`](crate::vmstate_subsections) macro implementation. -#[repr(transparent)] -pub struct VMStateSubsectionsWrapper(pub &'static [*const crate::bindings::VMStateDescription]); - -unsafe impl Sync for VMStateSubsectionsWrapper {} - -/// Helper macro to declare a list of subsections ([`VMStateDescription`]) -/// into a static and return a pointer to the array of pointers it created. -#[macro_export] -macro_rules! vmstate_subsections { - ($($subsection:expr),*$(,)*) => {{ - static _SUBSECTIONS: $crate::vmstate::VMStateSubsectionsWrapper = $crate::vmstate::VMStateSubsectionsWrapper(&[ - $({ - static _SUBSECTION: $crate::bindings::VMStateDescription = $subsection; - ::core::ptr::addr_of!(_SUBSECTION) - }),*, - ::core::ptr::null() - ]); - _SUBSECTIONS.0.as_ptr() - }} -} |