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//! Config about how much perf stats to collect
use std::mem;
use rocks_sys as ll;
/// How much perf stats to collect. Affects [`perf_context`] and [`iostats_context`].
///
/// [`perf_context`]: ../../rocks/perf_context/index.html
/// [`iostats_context`]: ../../rocks/iostats_context/index.html
#[repr(u8)]
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum PerfLevel {
/// unknown setting
Uninitialized = 0,
/// disable perf stats
Disable = 1,
/// enable only count stats
EnableCount = 2,
/// Other than count stats, also enable time
/// stats except for mutexes
EnableTimeExceptForMutex = 3,
/// enable count and time stats
EnableTime = 4,
}
/// set the perf stats level for current thread
pub fn set_perf_level(level: PerfLevel) {
unsafe {
ll::rocks_set_perf_level(mem::transmute(level));
}
}
/// get current perf stats level for current thread
pub fn get_perf_level() -> PerfLevel {
unsafe { mem::transmute(ll::rocks_get_perf_level()) }
}
#[test]
fn test_perf_level() {
set_perf_level(PerfLevel::Disable);
assert_eq!(get_perf_level(), PerfLevel::Disable);
set_perf_level(PerfLevel::EnableTimeExceptForMutex);
assert_eq!(get_perf_level(), PerfLevel::EnableTimeExceptForMutex);
}