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Introduce LibCore and move GElapsedTimer => CElapsedTimer.

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I need a layer somewhere between AK (usable both by userspace and kernel)
and LibGUI (usable by userspace except WindowServer.) So here's LibCore.
This commit is contained in:
Andreas Kling 2019-04-10 16:14:44 +02:00
parent a74f3615ac
commit 5e0577a042
21 changed files with 98 additions and 37 deletions
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29
LibGUI/GElapsedTimer.cpp
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@ -1,29 +0,0 @@
#include <LibGUI/GElapsedTimer.h>
#include <AK/Assertions.h>
#include <sys/time.h>
void GElapsedTimer::start()
{
m_valid = true;
gettimeofday(&m_start_time, nullptr);
}
inline void timersub(const struct timeval* a, const struct timeval* b, struct timeval* result)
{
result->tv_sec = a->tv_sec - b->tv_sec;
result->tv_usec = a->tv_usec - b->tv_usec;
if (result->tv_usec < 0) {
--result->tv_sec;
result->tv_usec += 1000000;
}
}
int GElapsedTimer::elapsed() const
{
ASSERT(is_valid());
struct timeval now;
gettimeofday(&now, nullptr);
struct timeval diff;
timersub(&now, &m_start_time, &diff);
return diff.tv_sec * 1000 + diff.tv_usec / 1000;
}