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The existing translation of the C macros for vmstate does not make any attempt to type-check vmstate declarations against the struct, so introduce a new system that computes VMStateField based on the actual struct declaration. Macros do not have full access to the type system, therefore a full implementation of this scheme requires a helper trait to analyze the type and produce a VMStateField from it; a macro "vmstate_of!" accepts arguments similar to "offset_of!" and tricks the compiler into looking up the trait for the right type. The patch introduces not just vmstate_of!, but also the slightly too clever enabling macro call_func_with_field!. The particular trick used here was proposed on the users.rust-lang.org forum, so I take no merit and all the blame. Introduce the trait and some functions to access it; the actual implementation comes later. Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| README.md | ||
QEMU bindings and API wrappers
This library exports helper Rust types, Rust macros and C FFI bindings for internal QEMU APIs.
The C bindings can be generated with bindgen, using this build target:
$ make bindings.inc.rs
Generate Rust documentation
Common Cargo tasks can be performed from the QEMU build directory
$ make clippy
$ make rustfmt
$ make rustdoc