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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
timer.h
Timer devices.
***************************************************************************/
#ifndef MAME_MACHINE_TIMER_H
#define MAME_MACHINE_TIMER_H
#pragma once
#include "screen.h"
//**************************************************************************
// MACROS
//**************************************************************************
// macros for a timer callback functions
#define TIMER_DEVICE_CALLBACK_MEMBER(name) void name(timer_device &timer, s32 param)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> timer_device
class timer_device : public device_t
{
public:
// a timer callbacks look like this
typedef device_delegate<void (timer_device &, s32)> expired_delegate;
// construction/destruction
timer_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// inline configuration helpers
template <typename... T> void configure_generic(T &&... args)
{
m_type = TIMER_TYPE_GENERIC;
m_callback.set(std::forward<T>(args)...);
}
template <typename F> void configure_periodic(F &&callback, const char *name, const attotime &period)
{
m_type = TIMER_TYPE_PERIODIC;
m_callback.set(std::forward<F>(callback), name);
m_period = period;
}
template <typename T, typename F> void configure_periodic(T &&target, F &&callback, const char *name, const attotime &period)
{
m_type = TIMER_TYPE_PERIODIC;
m_callback.set(std::forward<T>(target), std::forward<F>(callback), name);
m_period = period;
}
template <typename F, typename U> void configure_scanline(F &&callback, const char *name, U &&screen, int first_vpos, int increment)
{
m_type = TIMER_TYPE_SCANLINE;
m_callback.set(std::forward<F>(callback), name);
m_screen.set_tag(std::forward<U>(screen));
m_first_vpos = first_vpos;
m_increment = increment;
}
template <typename T, typename F, typename U> void configure_scanline(T &&target, F &&callback, const char *name, U &&screen, int first_vpos, int increment)
{
m_type = TIMER_TYPE_SCANLINE;
m_callback.set(std::forward<T>(target), std::forward<F>(callback), name);
m_screen.set_tag(std::forward<U>(screen));
m_first_vpos = first_vpos;
m_increment = increment;
}
template <typename... T> void set_callback(T &&... args) { m_callback.set(std::forward<T>(args)...); }
void set_start_delay(const attotime &delay) { m_start_delay = delay; }
void config_param(int param) { m_param = param; }
// property getters
int param() const { return m_timer->param(); }
bool enabled() const { return m_timer->enabled(); }
// property setters
void set_param(int param) const { if(m_type != TIMER_TYPE_GENERIC) fatalerror("Cannot change parameter on a non-generic timer.\n"); m_timer->set_param(param); }
void enable(bool enable = true) const { m_timer->enable(enable); }
// adjustments
void reset() { adjust(attotime::never, 0, attotime::never); }
void adjust(const attotime &duration, s32 param = 0, const attotime &period = attotime::never) const
{
if(m_type != TIMER_TYPE_GENERIC)
fatalerror("Cannot adjust a non-generic timer.\n");
m_timer->adjust(duration, param, period);
}
// timing information
bool running() const { return m_timer->running(); }
attotime elapsed() const { return m_timer->elapsed(); }
attotime remaining() const { return m_timer->remaining(); }
attotime start() const { return m_timer->start(); }
attotime expire() const { return m_timer->expire(); }
attotime period() const { return m_timer ? m_timer->period() : m_period; }
private:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const override;
virtual void device_start() override;
virtual void device_reset() override;
TIMER_CALLBACK_MEMBER(generic_tick);
TIMER_CALLBACK_MEMBER(scanline_tick);
// timer types
enum timer_type
{
TIMER_TYPE_PERIODIC,
TIMER_TYPE_SCANLINE,
TIMER_TYPE_GENERIC
};
// configuration data
timer_type m_type; // type of timer
expired_delegate m_callback; // the timer's callback function
// periodic timers only
attotime m_start_delay; // delay before the timer fires for the first time
attotime m_period; // period of repeated timer firings
s32 m_param; // the integer parameter passed to the timer callback
// scanline timers only
optional_device<screen_device> m_screen; // pointer to the screen device
u32 m_first_vpos; // the first vertical scanline position the timer fires on
u32 m_increment; // the number of scanlines between firings
// internal state
emu_timer * m_timer; // the backing timer
bool m_first_time; // indicates that the system is starting (scanline timers only)
};
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
DECLARE_DEVICE_TYPE(TIMER, timer_device)
#endif // MAME_MACHINE_TIMER_H
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