diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-12-08 12:16:56 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2025-01-23 11:50:53 +0100 |
| commit | 0d43ddae35a29d1822ec3f35a31bfe7c91618ef4 (patch) | |
| tree | 9fc4175e611650c4e41567acf48d3370925ba1bd /rust/qemu-api/src/prelude.rs | |
| parent | 57f9d9c84a9112d534fa90f2a6dad74bd71150b6 (diff) | |
| download | qemu-0d43ddae35a29d1822ec3f35a31bfe7c91618ef4.zip qemu-0d43ddae35a29d1822ec3f35a31bfe7c91618ef4.tar.gz qemu-0d43ddae35a29d1822ec3f35a31bfe7c91618ef4.tar.bz2 | |
rust: vmstate: add new type safe implementation
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>
Diffstat (limited to 'rust/qemu-api/src/prelude.rs')
| -rw-r--r-- | rust/qemu-api/src/prelude.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/qemu-api/src/prelude.rs b/rust/qemu-api/src/prelude.rs index 4ea70b9..2dc86e1 100644 --- a/rust/qemu-api/src/prelude.rs +++ b/rust/qemu-api/src/prelude.rs @@ -18,3 +18,5 @@ pub use crate::qom::ObjectType; pub use crate::qom_isa; pub use crate::sysbus::SysBusDeviceMethods; + +pub use crate::vmstate::VMState; |