Files
jsix/src/kernel/clock.cpp
Justin C. Miller f4cbb9498f [kernel] Fix clock period vs frequency error
Calling `spinwait()` was hanging due to improper computation of the
clock rate because justin did a dumb at math. Also the period can be
greater than 1ns, so the clock's units were updated to microseconds.
2020-07-12 17:43:37 -07:00

23 lines
382 B
C++

#include "clock.h"
clock * clock::s_instance = nullptr;
clock::clock(uint64_t rate, clock::source source_func, void *data) :
m_rate(rate),
m_data(data),
m_source(source_func)
{
// TODO: make this atomic
if (s_instance == nullptr)
s_instance = this;
update();
}
void
clock::spinwait(uint64_t us) const
{
uint64_t when = m_source(m_data) + us;
while (value() < when);
}