85 lines
2.2 KiB
Rust
85 lines
2.2 KiB
Rust
#[abi = "cdecl"]
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native mod rustrt {
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fn get_time(&sec: u32, &usec: u32);
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fn precise_time_ns(&ns: u64);
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}
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#[doc = "A record specifying a time value in seconds and microseconds."]
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type timeval = {sec: u32, usec: u32};
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#[doc = "
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Returns the current time as a `timeval` containing the seconds and
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microseconds since 1970-01-01T00:00:00Z.
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"]
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fn get_time() -> timeval {
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let mut sec = 0u32;
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let mut usec = 0u32;
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rustrt::get_time(sec, usec);
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ret {sec: sec, usec: usec};
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}
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#[doc = "
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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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"]
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fn precise_time_ns() -> u64 {
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let mut ns = 0u64;
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rustrt::precise_time_ns(ns);
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ns
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}
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#[doc = "
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Returns the current value of a high-resolution performance counter
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in seconds since an unspecified epoch.
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"]
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fn precise_time_s() -> float {
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ret (precise_time_ns() as float) / 1000000000.;
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}
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#[cfg(test)]
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mod tests {
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import task;
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#[test]
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fn test_get_time() {
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const some_recent_date: u32 = 1325376000u32; // 2012-01-01T00:00:00Z
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const some_future_date: u32 = 1577836800u32; // 2020-01-01T00:00:00Z
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let tv1 = get_time();
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log(debug, "tv1=" + uint::str(tv1.sec as uint) + " sec + "
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+ uint::str(tv1.usec as uint) + " usec");
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assert tv1.sec > some_recent_date;
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assert tv1.usec < 1000000u32;
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let tv2 = get_time();
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log(debug, "tv2=" + uint::str(tv2.sec as uint) + " sec + "
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+ uint::str(tv2.usec as uint) + " usec");
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assert tv2.sec >= tv1.sec;
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assert tv2.sec < some_future_date;
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assert tv2.usec < 1000000u32;
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if tv2.sec == tv1.sec {
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assert tv2.usec >= tv1.usec;
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}
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}
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#[test]
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fn test_precise_time() {
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let s0 = precise_time_s();
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let ns1 = precise_time_ns();
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log(debug, "s0=" + float::to_str(s0, 9u) + " sec");
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assert s0 > 0.;
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let ns0 = (s0 * 1000000000.) as u64;
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log(debug, "ns0=" + u64::str(ns0) + " ns");
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log(debug, "ns1=" + u64::str(ns1) + " ns");
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assert ns1 >= ns0;
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let ns2 = precise_time_ns();
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log(debug, "ns2=" + u64::str(ns2) + " ns");
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assert ns2 >= ns1;
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}
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}
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