@@ -3352,6 +3352,7 @@ Rust
M: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
S: Maintained
F: rust/qemu-api
+F: rust/qemu-api-macros
F: rust/rustfmt.toml
SLIRP
@@ -1 +1,2 @@
+subdir('qemu-api-macros')
subdir('qemu-api')
new file mode 100644
@@ -0,0 +1,47 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "qemu_api_macros"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc4b9b9bf2add8093d3f2c0204471e951b2285580335de42f9d2534f3ae7a8af"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
new file mode 100644
@@ -0,0 +1,25 @@
+[package]
+name = "qemu_api_macros"
+version = "0.1.0"
+edition = "2021"
+authors = ["Manos Pitsidianakis <manos.pitsidianakis@linaro.org>"]
+license = "GPL-2.0-or-later"
+readme = "README.md"
+homepage = "https://www.qemu.org"
+description = "Rust bindings for QEMU - Utility macros"
+repository = "https://gitlab.com/qemu-project/qemu/"
+resolver = "2"
+publish = false
+keywords = []
+categories = []
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = "2"
+
+# Do not include in any global workspace
+[workspace]
new file mode 100644
@@ -0,0 +1 @@
+# `qemu-api-macros` - Utility macros for defining QEMU devices
new file mode 100644
@@ -0,0 +1,25 @@
+add_languages('rust', required: true, native: true)
+
+quote_dep = dependency('quote-1-rs', native: true)
+syn_dep = dependency('syn-2-rs', native: true)
+proc_macro2_dep = dependency('proc-macro2-1-rs', native: true)
+
+_qemu_api_macros_rs = import('rust').proc_macro(
+ 'qemu_api_macros',
+ files('src/lib.rs'),
+ override_options: ['rust_std=2021', 'build.rust_std=2021'],
+ rust_args: [
+ '--cfg', 'use_fallback',
+ '--cfg', 'feature="syn-error"',
+ '--cfg', 'feature="proc-macro"',
+ ],
+ dependencies: [
+ proc_macro2_dep,
+ quote_dep,
+ syn_dep,
+ ],
+)
+
+qemu_api_macros = declare_dependency(
+ link_with: _qemu_api_macros_rs,
+)
new file mode 100644
@@ -0,0 +1,43 @@
+// Copyright 2024, Linaro Limited
+// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+use proc_macro::TokenStream;
+use quote::{format_ident, quote};
+use syn::{parse_macro_input, DeriveInput};
+
+#[proc_macro_derive(Object)]
+pub fn derive_object(input: TokenStream) -> TokenStream {
+ let input = parse_macro_input!(input as DeriveInput);
+
+ let name = input.ident;
+ let module_static = format_ident!("__{}_LOAD_MODULE", name);
+
+ let expanded = quote! {
+ #[allow(non_upper_case_globals)]
+ #[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 #module_static: extern "C" fn() = {
+ extern "C" fn __register() {
+ unsafe {
+ ::qemu_api::bindings::type_register_static(&<#name as ::qemu_api::definitions::ObjectImpl>::TYPE_INFO);
+ }
+ }
+
+ extern "C" fn __load() {
+ unsafe {
+ ::qemu_api::bindings::register_module_init(
+ Some(__register),
+ ::qemu_api::bindings::module_init_type_MODULE_INIT_QOM
+ );
+ }
+ }
+
+ __load
+ };
+ };
+
+ TokenStream::from(expanded)
+}
@@ -14,6 +14,9 @@ _qemu_api_rs = static_library(
'--cfg', 'MESON',
'--cfg', 'feature="allocator"',
],
+ dependencies: [
+ qemu_api_macros,
+ ],
)
qemu_api = declare_dependency(
This commit adds a helper crate library, qemu-api-macros for derive (and other procedural) macros to be used along qemu-api. It needs to be a separate library because in Rust, procedural macros, or macros that can generate arbitrary code, need to be special separate compilation units. Only one macro is introduced in this patch, #[derive(Object)]. It generates a constructor to register a QOM TypeInfo on init and it must be used on types that implement qemu_api::definitions::ObjectImpl trait. Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> --- MAINTAINERS | 1 + rust/meson.build | 1 + rust/qemu-api-macros/Cargo.lock | 47 ++++++++++++++++++++++++++++++++++++++++ rust/qemu-api-macros/Cargo.toml | 25 +++++++++++++++++++++ rust/qemu-api-macros/README.md | 1 + rust/qemu-api-macros/meson.build | 25 +++++++++++++++++++++ rust/qemu-api-macros/src/lib.rs | 43 ++++++++++++++++++++++++++++++++++++ rust/qemu-api/meson.build | 3 +++ 8 files changed, 146 insertions(+)