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/***************************************************************************
timer.h
Functions needed to generate timing and synchronization between several
CPUs.
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
***************************************************************************/
#pragma once
#ifndef __EMU_H__
#error Dont include this file directly; include emu.h instead.
#endif
#ifndef __TIMER_H__
#define __TIMER_H__
#include "devlegcy.h"
/***************************************************************************
MACROS
***************************************************************************/
/* macro for the RC time constant on a 74LS123 with C > 1000pF */
/* R is in ohms, C is in farads */
#define TIME_OF_74LS123(r,c) (0.45 * (double)(r) * (double)(c))
/* macros for the RC time constant on a 555 timer IC */
/* R is in ohms, C is in farads */
#define PERIOD_OF_555_MONOSTABLE_NSEC(r,c) ((attoseconds_t)(1100000000 * (double)(r) * (double)(c)))
#define PERIOD_OF_555_ASTABLE_NSEC(r1,r2,c) ((attoseconds_t)( 693000000 * ((double)(r1) + 2.0 * (double)(r2)) * (double)(c)))
#define PERIOD_OF_555_MONOSTABLE(r,c) attotime::from_nsec(PERIOD_OF_555_MONOSTABLE_NSEC(r,c))
#define PERIOD_OF_555_ASTABLE(r1,r2,c) attotime::from_nsec(PERIOD_OF_555_ASTABLE_NSEC(r1,r2,c))
/* macros that map all allocations to provide file/line/functions to the callee */
#define timer_alloc(m,c,ptr) _timer_alloc_internal(m, c, ptr, __FILE__, __LINE__, #c)
#define timer_pulse(m,e,ptr,p,c) _timer_pulse_internal(m, e, ptr, p, c, __FILE__, __LINE__, #c)
#define timer_set(m,d,ptr,p,c) _timer_set_internal(m, d, ptr, p, c, __FILE__, __LINE__, #c)
#define timer_call_after_resynch(m,ptr,p,c) _timer_set_internal(m, attotime::zero, ptr, p, c, __FILE__, __LINE__, #c)
/* macros for a timer callback functions */
#define TIMER_CALLBACK(name) void name(running_machine *machine, void *ptr, int param)
#define TIMER_DEVICE_CALLBACK(name) void name(timer_device &timer, void *ptr, INT32 param)
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// forward declarations
class emu_timer;
class timer_device;
// a timer callback looks like this
typedef void (*timer_fired_func)(running_machine *machine, void *ptr, INT32 param);
typedef void (*timer_device_fired_func)(timer_device &timer, void *ptr, INT32 param);
struct timer_execution_state
{
attotime nextfire; /* time that the head of the timer list will fire */
attotime basetime; /* global basetime; everything moves forward from here */
attoseconds_t curquantum; /* current quantum of execution */
};
//**************************************************************************
// TIMER DEVICE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_TIMER_ADD(_tag, _callback) \
MCFG_DEVICE_ADD(_tag, TIMER, 0) \
timer_device_config::static_configure_generic(device, _callback); \
#define MCFG_TIMER_ADD_PERIODIC(_tag, _callback, _period) \
MCFG_DEVICE_ADD(_tag, TIMER, 0) \
timer_device_config::static_configure_periodic(device, _callback, _period); \
#define MCFG_TIMER_ADD_SCANLINE(_tag, _callback, _screen, _first_vpos, _increment) \
MCFG_DEVICE_ADD(_tag, TIMER, 0) \
timer_device_config::static_configure_scanline(device, _callback, _screen, _first_vpos, _increment); \
#define MCFG_TIMER_MODIFY(_tag) \
MCFG_DEVICE_MODIFY(_tag)
#define MCFG_TIMER_CALLBACK(_callback) \
timer_device_config::static_set_callback(device, _callback); \
#define MCFG_TIMER_START_DELAY(_start_delay) \
timer_device_config::static_set_start_delay(device, _start_delay); \
#define MCFG_TIMER_PARAM(_param) \
timer_device_config::static_set_param(device, _param); \
#define MCFG_TIMER_PTR(_ptr) \
timer_device_config::static_set_ptr(device, (void *)(_ptr)); \
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
/* ----- initialization ----- */
/* initialize the timer system */
void timer_init(running_machine *machine);
/* destruct a timer from a pool callback */
void timer_destructor(void *ptr, size_t size);
/* ----- scheduling helpers ----- */
/* return a pointer to the execution state */
timer_execution_state *timer_get_execution_state(running_machine *machine);
/* execute timers and update scheduling quanta */
void timer_execute_timers(running_machine *machine);
/* add a scheduling quantum; the smallest active one is the one that is in use */
void timer_add_scheduling_quantum(running_machine *machine, attoseconds_t quantum, attotime duration);
/* control the minimum useful quantum (used by cpuexec only) */
void timer_set_minimum_quantum(running_machine *machine, attoseconds_t quantum);
/* ----- save/restore helpers ----- */
/* count the number of anonymous (non-saveable) timers */
int timer_count_anonymous(running_machine *machine);
/* ----- core timer management ----- */
/* allocate a permament timer that isn't primed yet */
emu_timer *_timer_alloc_internal(running_machine *machine, timer_fired_func callback, void *param, const char *file, int line, const char *func);
/* allocate a permament device timer that isn't primed yet */
emu_timer *device_timer_alloc(device_t &device, device_timer_id id = 0, void *ptr = NULL);
/* adjust the time when this timer will fire and disable any periodic firings */
void timer_adjust_oneshot(emu_timer *which, attotime duration, INT32 param);
/* adjust the time when this timer will fire and specify a period for subsequent firings */
void timer_adjust_periodic(emu_timer *which, attotime start_delay, INT32 param, attotime period);
/* ----- anonymous timer management ----- */
/* request a one-shot temporary timer for a device */
void device_timer_call_after_resynch(device_t &device, device_timer_id id = 0, INT32 param = 0, void *ptr = NULL);
/* allocate a one-shot timer, which calls the callback after the given duration */
void _timer_set_internal(running_machine *machine, attotime duration, void *ptr, INT32 param, timer_fired_func callback, const char *file, int line, const char *func);
/* allocate a pulse timer, which repeatedly calls the callback using the given period */
void _timer_pulse_internal(running_machine *machine, attotime period, void *ptr, INT32 param, timer_fired_func callback, const char *file, int line, const char *func);
/* ----- miscellaneous controls ----- */
/* reset the timing on a timer */
void timer_reset(emu_timer *which, attotime duration);
/* enable/disable a timer */
int timer_enable(emu_timer *which, int enable);
/* determine if a timer is enabled */
int timer_enabled(emu_timer *which);
/* returns the callback parameter of a timer */
int timer_get_param(emu_timer *which);
/* changes the callback parameter of a timer */
void timer_set_param(emu_timer *which, int param);
/* returns the callback pointer of a timer */
void *timer_get_ptr(emu_timer *which);
/* changes the callback pointer of a timer */
void timer_set_ptr(emu_timer *which, void *ptr);
/* ----- timing functions ----- */
/* return the time since the last trigger */
attotime timer_timeelapsed(emu_timer *which);
/* return the time until the next trigger */
attotime timer_timeleft(emu_timer *which);
/* return the current time */
attotime timer_get_time(running_machine *machine);
/* return the time when this timer started counting */
attotime timer_starttime(emu_timer *which);
/* return the time when this timer will fire next */
attotime timer_firetime(emu_timer *which);
// ======================> timer_device_config
class timer_device_config : public device_config
{
friend class timer_device;
// construction/destruction
timer_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
public:
// allocators
static device_config *static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
virtual device_t *alloc_device(running_machine &machine) const;
// inline configuration helpers
static void static_configure_generic(device_config *device, timer_device_fired_func callback);
static void static_configure_periodic(device_config *device, timer_device_fired_func callback, attotime period);
static void static_configure_scanline(device_config *device, timer_device_fired_func callback, const char *screen, int first_vpos, int increment);
static void static_set_callback(device_config *device, timer_device_fired_func callback);
static void static_set_start_delay(device_config *device, attotime delay);
static void static_set_param(device_config *device, int param);
static void static_set_ptr(device_config *device, void *ptr);
private:
// device_config overrides
virtual bool device_validity_check(const game_driver &driver) const;
// timer types
enum timer_type
{
TIMER_TYPE_PERIODIC,
TIMER_TYPE_SCANLINE,
TIMER_TYPE_GENERIC
};
// configuration data
timer_type m_type; // type of timer
timer_device_fired_func m_callback; // the timer's callback function
void * m_ptr; // the pointer parameter passed to the timer callback
// periodic timers only
attotime m_start_delay; // delay before the timer fires for the first time
attotime m_period; // period of repeated timer firings
INT32 m_param; // the integer parameter passed to the timer callback
// scanline timers only
const char * m_screen; // the name of the screen this timer tracks
UINT32 m_first_vpos; // the first vertical scanline position the timer fires on
UINT32 m_increment; // the number of scanlines between firings
};
// ======================> timer_device
class timer_device : public device_t
{
friend class timer_device_config;
// construction/destruction
timer_device(running_machine &_machine, const timer_device_config &config);
public:
// property getters
int param() const { return timer_get_param(m_timer); }
void *ptr() const { return m_ptr; }
bool enabled() const { return (timer_enabled(m_timer) != 0); }
// property setters
void set_param(int param) { assert(m_config.m_type == timer_device_config::TIMER_TYPE_GENERIC); timer_set_param(m_timer, param); }
void set_ptr(void *ptr) { m_ptr = ptr; }
void enable(bool enable = true) { timer_enable(m_timer, enable); }
// adjustments
void reset() { adjust(attotime::never, 0, attotime::never); }
void adjust(attotime duration, INT32 param = 0, attotime period = attotime::never) { assert(m_config.m_type == timer_device_config::TIMER_TYPE_GENERIC); timer_adjust_periodic(m_timer, duration, param, period); }
// timing information
attotime time_elapsed() const { return timer_timeelapsed(m_timer); }
attotime time_left() const { return timer_timeleft(m_timer); }
attotime start_time() const { return timer_starttime(m_timer); }
attotime fire_time() const { return timer_firetime(m_timer); }
private:
// device-level overrides
virtual void device_start();
virtual void device_reset();
// internal helpers
static TIMER_CALLBACK( static_periodic_timer_callback ) { reinterpret_cast<timer_device *>(ptr)->periodic_timer_callback(param); }
void periodic_timer_callback(int param);
static TIMER_CALLBACK( static_scanline_timer_callback ) { reinterpret_cast<timer_device *>(ptr)->scanline_timer_callback(param); }
void scanline_timer_callback(int scanline);
// internal state
const timer_device_config &m_config;
emu_timer * m_timer; // the backing timer
void * m_ptr; // the pointer parameter passed to the timer callback
// scanline timers only
screen_device *m_screen; // pointer to the screen
bool m_first_time; // indicates that the system is starting
};
// device type definition
extern const device_type TIMER;
#endif /* __TIMER_H__ */
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