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Diffstat (limited to 'rust/qemu-api/src/definitions.rs')
| -rw-r--r-- | rust/qemu-api/src/definitions.rs | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/rust/qemu-api/src/definitions.rs b/rust/qemu-api/src/definitions.rs new file mode 100644 index 0000000000..60bd3f8aaa --- /dev/null +++ b/rust/qemu-api/src/definitions.rs @@ -0,0 +1,97 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org> +// SPDX-License-Identifier: GPL-2.0-or-later + +//! Definitions required by QEMU when registering a device. + +use ::core::ffi::{c_void, CStr}; + +use crate::bindings::{Object, ObjectClass, TypeInfo}; + +/// Trait a type must implement to be registered with QEMU. +pub trait ObjectImpl { + type Class; + const TYPE_INFO: TypeInfo; + const TYPE_NAME: &'static CStr; + const PARENT_TYPE_NAME: Option<&'static CStr>; + const ABSTRACT: bool; + const INSTANCE_INIT: Option<unsafe extern "C" fn(obj: *mut Object)>; + const INSTANCE_POST_INIT: Option<unsafe extern "C" fn(obj: *mut Object)>; + const INSTANCE_FINALIZE: Option<unsafe extern "C" fn(obj: *mut Object)>; +} + +pub trait Class { + const CLASS_INIT: Option<unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut c_void)>; + const CLASS_BASE_INIT: Option< + unsafe extern "C" fn(klass: *mut ObjectClass, data: *mut c_void), + >; +} + +#[macro_export] +macro_rules! module_init { + ($func:expr, $type:expr) => { + #[used] + #[cfg_attr(target_os = "linux", link_section = ".ctors")] + #[cfg_attr(target_os = "macos", link_section = "__DATA,__mod_init_func")] + #[cfg_attr(target_os = "windows", link_section = ".CRT$XCU")] + pub static LOAD_MODULE: extern "C" fn() = { + extern "C" fn __load() { + unsafe { + $crate::bindings::register_module_init(Some($func), $type); + } + } + + __load + }; + }; + (qom: $func:ident => $body:block) => { + // NOTE: To have custom identifiers for the ctor func we need to either supply + // them directly as a macro argument or create them with a proc macro. + #[used] + #[cfg_attr(target_os = "linux", link_section = ".ctors")] + #[cfg_attr(target_os = "macos", link_section = "__DATA,__mod_init_func")] + #[cfg_attr(target_os = "windows", link_section = ".CRT$XCU")] + pub static LOAD_MODULE: extern "C" fn() = { + extern "C" fn __load() { + #[no_mangle] + unsafe extern "C" fn $func() { + $body + } + + unsafe { + $crate::bindings::register_module_init( + Some($func), + $crate::bindings::module_init_type::MODULE_INIT_QOM, + ); + } + } + + __load + }; + }; +} + +#[macro_export] +macro_rules! type_info { + ($t:ty) => { + $crate::bindings::TypeInfo { + name: <$t as $crate::definitions::ObjectImpl>::TYPE_NAME.as_ptr(), + parent: if let Some(pname) = <$t as $crate::definitions::ObjectImpl>::PARENT_TYPE_NAME { + pname.as_ptr() + } else { + ::core::ptr::null_mut() + }, + instance_size: ::core::mem::size_of::<$t>() as $crate::bindings::size_t, + instance_align: ::core::mem::align_of::<$t>() as $crate::bindings::size_t, + instance_init: <$t as $crate::definitions::ObjectImpl>::INSTANCE_INIT, + instance_post_init: <$t as $crate::definitions::ObjectImpl>::INSTANCE_POST_INIT, + instance_finalize: <$t as $crate::definitions::ObjectImpl>::INSTANCE_FINALIZE, + abstract_: <$t as $crate::definitions::ObjectImpl>::ABSTRACT, + class_size: ::core::mem::size_of::<<$t as $crate::definitions::ObjectImpl>::Class>() as $crate::bindings::size_t, + class_init: <<$t as $crate::definitions::ObjectImpl>::Class as $crate::definitions::Class>::CLASS_INIT, + class_base_init: <<$t as $crate::definitions::ObjectImpl>::Class as $crate::definitions::Class>::CLASS_BASE_INIT, + class_data: ::core::ptr::null_mut(), + interfaces: ::core::ptr::null_mut(), + }; + } +} |