e5b9f1b786
* Winx now returns io::Error This commit is a spiritual follower of #1242 in the sense that it adjusts `winx` to also return `io::Error` directly rather than tossing a custom error type here and there. * Adapt wasi-common to changes in winx * Run cargo fmt * Swap overly big map_err with explicit match
12 lines
346 B
Rust
12 lines
346 B
Rust
use cvt::cvt;
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use std::io::Result;
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use winapi::um::{profileapi::QueryPerformanceFrequency, winnt::LARGE_INTEGER};
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pub fn perf_counter_frequency() -> Result<u64> {
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unsafe {
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let mut frequency: LARGE_INTEGER = std::mem::zeroed();
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cvt(QueryPerformanceFrequency(&mut frequency))?;
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Ok(*frequency.QuadPart() as u64)
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}
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}
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