mirror of https://github.com/rust-lang/rust
36 lines
734 B
Rust
36 lines
734 B
Rust
//@ run-pass
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#![allow(non_snake_case)]
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#[derive(Clone, Copy)]
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#[repr(C)]
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struct LARGE_INTEGER_U {
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LowPart: u32,
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HighPart: u32,
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}
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#[derive(Clone, Copy)]
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#[repr(C)]
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union LARGE_INTEGER {
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__unnamed__: LARGE_INTEGER_U,
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u: LARGE_INTEGER_U,
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QuadPart: u64,
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}
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#[link(name = "rust_test_helpers", kind = "static")]
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extern "C" {
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fn increment_all_parts(_: LARGE_INTEGER) -> LARGE_INTEGER;
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}
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fn main() {
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unsafe {
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let mut li = LARGE_INTEGER { QuadPart: 0 };
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let li_c = increment_all_parts(li);
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li.__unnamed__.LowPart += 1;
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li.__unnamed__.HighPart += 1;
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li.u.LowPart += 1;
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li.u.HighPart += 1;
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li.QuadPart += 1;
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assert_eq!(li.QuadPart, li_c.QuadPart);
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}
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}
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