112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
// Copyright 2008 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
// This is a system to schedule events into the emulated machine's future. Time is measured
|
|
// in main CPU clock cycles.
|
|
|
|
// To schedule an event, you first have to register its type. This is where you pass in the
|
|
// callback. You then schedule events using the type id you get back.
|
|
|
|
// See HW/SystemTimers.cpp for the main part of Dolphin's usage of this scheduler.
|
|
|
|
// The int cyclesLate that the callbacks get is how many cycles late it was.
|
|
// So to schedule a new event on a regular basis:
|
|
// inside callback:
|
|
// ScheduleEvent(periodInCycles - cyclesLate, callback, "whatever")
|
|
|
|
#include <string>
|
|
#include "Common/CommonTypes.h"
|
|
|
|
class PointerWrap;
|
|
|
|
namespace CoreTiming
|
|
{
|
|
// These really shouldn't be global, but jit64 accesses them directly
|
|
struct Globals
|
|
{
|
|
s64 global_timer;
|
|
int slice_length;
|
|
u64 fake_TB_start_value;
|
|
u64 fake_TB_start_ticks;
|
|
float last_OC_factor_inverted;
|
|
};
|
|
extern Globals g;
|
|
|
|
// CoreTiming begins at the boundary of timing slice -1. An initial call to Advance() is
|
|
// required to end slice -1 and start slice 0 before the first cycle of code is executed.
|
|
void Init();
|
|
void Shutdown();
|
|
|
|
typedef void (*TimedCallback)(u64 userdata, s64 cyclesLate);
|
|
|
|
// This should only be called from the CPU thread, if you are calling it any other thread, you are
|
|
// doing something evil
|
|
u64 GetTicks();
|
|
u64 GetIdleTicks();
|
|
|
|
void DoState(PointerWrap& p);
|
|
|
|
struct EventType;
|
|
|
|
// Returns the event_type identifier. if name is not unique, an existing event_type will be
|
|
// discarded.
|
|
EventType* RegisterEvent(const std::string& name, TimedCallback callback);
|
|
void UnregisterAllEvents();
|
|
|
|
enum class FromThread
|
|
{
|
|
CPU,
|
|
NON_CPU,
|
|
// Don't use ANY unless you're sure you need to call from
|
|
// both the CPU thread and at least one other thread
|
|
ANY
|
|
};
|
|
|
|
// userdata MAY NOT CONTAIN POINTERS. userdata might get written and reloaded from savestates.
|
|
// After the first Advance, the slice lengths and the downcount will be reduced whenever an event
|
|
// is scheduled earlier than the current values (when scheduled from the CPU Thread only).
|
|
// Scheduling from a callback will not update the downcount until the Advance() completes.
|
|
void ScheduleEvent(s64 cycles_into_future, EventType* event_type, u64 userdata = 0,
|
|
FromThread from = FromThread::CPU);
|
|
|
|
// We only permit one event of each type in the queue at a time.
|
|
void RemoveEvent(EventType* event_type);
|
|
void RemoveAllEvents(EventType* event_type);
|
|
|
|
// Advance must be called at the beginning of dispatcher loops, not the end. Advance() ends
|
|
// the previous timing slice and begins the next one, you must Advance from the previous
|
|
// slice to the current one before executing any cycles. CoreTiming starts in slice -1 so an
|
|
// Advance() is required to initialize the slice length before the first cycle of emulated
|
|
// instructions is executed.
|
|
// NOTE: Advance updates the PowerPC downcount and performs a PPC external exception check.
|
|
void Advance();
|
|
void MoveEvents();
|
|
|
|
// Pretend that the main CPU has executed enough cycles to reach the next event.
|
|
void Idle();
|
|
|
|
// Clear all pending events. This should ONLY be done on exit or state load.
|
|
void ClearPendingEvents();
|
|
|
|
void LogPendingEvents();
|
|
|
|
std::string GetScheduledEventsSummary();
|
|
|
|
void AdjustEventQueueTimes(u32 new_ppc_clock, u32 old_ppc_clock);
|
|
|
|
u32 GetFakeDecStartValue();
|
|
void SetFakeDecStartValue(u32 val);
|
|
u64 GetFakeDecStartTicks();
|
|
void SetFakeDecStartTicks(u64 val);
|
|
u64 GetFakeTBStartValue();
|
|
void SetFakeTBStartValue(u64 val);
|
|
u64 GetFakeTBStartTicks();
|
|
void SetFakeTBStartTicks(u64 val);
|
|
|
|
void ForceExceptionCheck(s64 cycles);
|
|
|
|
} // end of namespace
|