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LibCore: Use monotonic time when handling timers

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Liav A 2020-03-14 01:03:47 +02:00 • committed by Andreas Kling
parent b536547c52
commit 7268499c76
2 changed files with 21 additions and 5 deletions
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11
Libraries/LibCore/ElapsedTimer.cpp
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@ -28,20 +28,27 @@
#include <AK/Time.h> #include <AK/Time.h>
#include <LibCore/ElapsedTimer.h> #include <LibCore/ElapsedTimer.h>
#include <sys/time.h> #include <sys/time.h>
#include <time.h>
namespace Core { namespace Core {
void ElapsedTimer::start() void ElapsedTimer::start()
{ {
m_valid = true; m_valid = true;
gettimeofday(&m_start_time, nullptr); timespec now_spec;
clock_gettime(CLOCK_MONOTONIC, &now_spec);
m_start_time.tv_sec = now_spec.tv_sec;
m_start_time.tv_usec = now_spec.tv_nsec / 1000;
} }
int ElapsedTimer::elapsed() const int ElapsedTimer::elapsed() const
{ {
ASSERT(is_valid()); ASSERT(is_valid());
struct timeval now; struct timeval now;
gettimeofday(&now, nullptr); timespec now_spec;
clock_gettime(CLOCK_MONOTONIC, &now_spec);
now.tv_sec = now_spec.tv_sec;
now.tv_usec = now_spec.tv_nsec / 1000;
struct timeval diff; struct timeval diff;
timeval_sub(now, m_start_time, diff); timeval_sub(now, m_start_time, diff);
return diff.tv_sec * 1000 + diff.tv_usec / 1000; return diff.tv_sec * 1000 + diff.tv_usec / 1000;

15
Libraries/LibCore/EventLoop.cpp
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@ -420,7 +420,10 @@ void EventLoop::wait_for_event(WaitMode mode)
bool should_wait_forever = false; bool should_wait_forever = false;
if (mode == WaitMode::WaitForEvents) { if (mode == WaitMode::WaitForEvents) {
if (!s_timers->is_empty() && queued_events_is_empty) { if (!s_timers->is_empty() && queued_events_is_empty) {
gettimeofday(&now, nullptr); timespec now_spec;
clock_gettime(CLOCK_MONOTONIC, &now_spec);
now.tv_sec = now_spec.tv_sec;
now.tv_usec = now_spec.tv_nsec / 1000;
get_next_timer_expiration(timeout); get_next_timer_expiration(timeout);
timeval_sub(timeout, now, timeout); timeval_sub(timeout, now, timeout);
if (timeout.tv_sec < 0) { if (timeout.tv_sec < 0) {
@ -446,7 +449,10 @@ void EventLoop::wait_for_event(WaitMode mode)
} }
if (!s_timers->is_empty()) { if (!s_timers->is_empty()) {
gettimeofday(&now, nullptr); timespec now_spec;
clock_gettime(CLOCK_MONOTONIC, &now_spec);
now.tv_sec = now_spec.tv_sec;
now.tv_usec = now_spec.tv_nsec / 1000;
} }
for (auto& it : *s_timers) { for (auto& it : *s_timers) {
@ -521,7 +527,10 @@ int EventLoop::register_timer(Object& object, int milliseconds, bool should_relo
timer->owner = object.make_weak_ptr(); timer->owner = object.make_weak_ptr();
timer->interval = milliseconds; timer->interval = milliseconds;
timeval now; timeval now;
gettimeofday(&now, nullptr); timespec now_spec;
clock_gettime(CLOCK_MONOTONIC, &now_spec);
now.tv_sec = now_spec.tv_sec;
now.tv_usec = now_spec.tv_nsec / 1000;
timer->reload(now); timer->reload(now);
timer->should_reload = should_reload; timer->should_reload = should_reload;
timer->fire_when_not_visible = fire_when_not_visible; timer->fire_when_not_visible = fire_when_not_visible;