08f6380a9f
**The implementation is a direct adaptation of libcxx's condition_variable implementation.** pthread_cond_timedwait uses the non-monotonic system clock. It's possible to change the clock to a monotonic via pthread_cond_attr, but this is incompatible with static initialization. To deal with this, we calculate the timeout using the system clock, and maintain a separate record of the start and end times with a monotonic clock to be used for calculation of the return value.
24 lines
842 B
Rust
24 lines
842 B
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Temporal quantification.
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use sys::time::SteadyTime;
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pub use self::duration::Duration;
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pub mod duration;
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/// Returns the current value of a high-resolution performance counter
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/// in nanoseconds since an unspecified epoch.
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// NB: this is intentionally not public, this is not ready to stabilize its api.
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fn precise_time_ns() -> u64 {
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SteadyTime::now().ns()
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}
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