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#pragma once
#include <AK/Function.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/OwnPtr.h>
#include <AK/SinglyLinkedList.h>
#include <Kernel/Arch/i386/PIT.h>
struct Timer {
u64 id;
u64 expires;
Function<void()> callback;
bool operator<(const Timer& rhs) const
{
return expires < rhs.expires;
}
bool operator>(const Timer& rhs) const
{
return expires > rhs.expires;
}
bool operator==(const Timer& rhs) const
{
return id == rhs.id;
}
};
enum TimeUnit {
MS = TICKS_PER_SECOND / 1000,
S = TICKS_PER_SECOND,
M = TICKS_PER_SECOND * 60
};
class TimerQueue {
public:
static TimerQueue& the();
u64 add_timer(NonnullOwnPtr<Timer>&&);
u64 add_timer(u64 duration, TimeUnit, Function<void()>&& callback);
bool cancel_timer(u64 id);
void fire();
private:
void update_next_timer_due();
u64 m_next_timer_due { 0 };
u64 m_timer_id_count { 0 };
SinglyLinkedList<NonnullOwnPtr<Timer>> m_timer_queue;
};
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