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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Assertions.h>
#include <AK/Function.h>
#include <AK/IntrusiveList.h>
#include <AK/Types.h>
#include <Kernel/Forward.h>
#include <Kernel/Locking/Spinlock.h>
#include <Kernel/Time/TimeManagement.h>
#include <Kernel/UnixTypes.h>
namespace Kernel {
struct RegisterState;
extern Thread* g_finalizer;
extern WaitQueue* g_finalizer_wait_queue;
extern Atomic<bool> g_finalizer_has_work;
extern RecursiveSpinlock g_scheduler_lock;
struct TotalTimeScheduled {
u64 total { 0 };
u64 total_kernel { 0 };
};
class Scheduler {
public:
static void initialize();
static Thread* create_ap_idle_thread(u32 cpu);
static void set_idle_thread(Thread* idle_thread);
static void timer_tick(RegisterState const&);
[[noreturn]] static void start();
static void pick_next();
static void yield();
static void context_switch(Thread*);
static void enter_current(Thread& prev_thread);
static void leave_on_first_switch(u32 flags);
static void prepare_after_exec();
static void prepare_for_idle_loop();
static Process* colonel();
static void idle_loop(void*);
static void invoke_async();
static void notify_finalizer();
static Thread& pull_next_runnable_thread();
static Thread* peek_next_runnable_thread();
static bool dequeue_runnable_thread(Thread&, bool = false);
static void enqueue_runnable_thread(Thread&);
static void dump_scheduler_state(bool = false);
static bool is_initialized();
static TotalTimeScheduled get_total_time_scheduled();
static void add_time_scheduled(u64, bool);
static u64 (*current_time)();
};
}
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