mirror of
https://github.com/holub/mame
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47dd9fe568
type safety. If legacy devices still use inline data, those types are not checked. However, new devices no longer have access to the generic m_inline_data. Instead their MDRV_* macros should map to calls to static functions in the device config class which downcast a generic device_config to the specific device config, and then set the appropriate values. This is not to be done inline in order to prevent further code bloat in the constructors. See eeprom/7474/i2cmem/okim6295 for examples. #ifdef'ed several unused machine driver definitions that weren't referenced.
326 lines
12 KiB
C++
326 lines
12 KiB
C++
/***************************************************************************
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timer.h
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Functions needed to generate timing and synchronization between several
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CPUs.
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Copyright Nicola Salmoria and the MAME Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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***************************************************************************/
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#pragma once
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#ifndef __EMU_H__
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#error Dont include this file directly; include emu.h instead.
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#endif
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#ifndef __TIMER_H__
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#define __TIMER_H__
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#include "devlegcy.h"
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/***************************************************************************
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MACROS
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***************************************************************************/
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/* macro for the RC time constant on a 74LS123 with C > 1000pF */
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/* R is in ohms, C is in farads */
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#define TIME_OF_74LS123(r,c) (0.45 * (double)(r) * (double)(c))
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/* macros for the RC time constant on a 555 timer IC */
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/* R is in ohms, C is in farads */
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#define PERIOD_OF_555_MONOSTABLE_NSEC(r,c) ((attoseconds_t)(1100000000 * (double)(r) * (double)(c)))
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#define PERIOD_OF_555_ASTABLE_NSEC(r1,r2,c) ((attoseconds_t)( 693000000 * ((double)(r1) + 2.0 * (double)(r2)) * (double)(c)))
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#define PERIOD_OF_555_MONOSTABLE(r,c) ATTOTIME_IN_NSEC(PERIOD_OF_555_MONOSTABLE_NSEC(r,c))
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#define PERIOD_OF_555_ASTABLE(r1,r2,c) ATTOTIME_IN_NSEC(PERIOD_OF_555_ASTABLE_NSEC(r1,r2,c))
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/* macros that map all allocations to provide file/line/functions to the callee */
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#define timer_alloc(m,c,ptr) _timer_alloc_internal(m, c, ptr, __FILE__, __LINE__, #c)
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#define timer_pulse(m,e,ptr,p,c) _timer_pulse_internal(m, e, ptr, p, c, __FILE__, __LINE__, #c)
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#define timer_set(m,d,ptr,p,c) _timer_set_internal(m, d, ptr, p, c, __FILE__, __LINE__, #c)
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#define timer_call_after_resynch(m,ptr,p,c) _timer_set_internal(m, attotime_zero, ptr, p, c, __FILE__, __LINE__, #c)
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/* macros for a timer callback functions */
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#define TIMER_CALLBACK(name) void name(running_machine *machine, void *ptr, int param)
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#define TIMER_DEVICE_CALLBACK(name) void name(timer_device &timer, void *ptr, INT32 param)
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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// forward declarations
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class emu_timer;
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class timer_device;
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// a timer callback looks like this
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typedef void (*timer_fired_func)(running_machine *machine, void *ptr, INT32 param);
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typedef void (*timer_device_fired_func)(timer_device &timer, void *ptr, INT32 param);
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struct timer_execution_state
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{
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attotime nextfire; /* time that the head of the timer list will fire */
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attotime basetime; /* global basetime; everything moves forward from here */
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attoseconds_t curquantum; /* current quantum of execution */
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};
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//**************************************************************************
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// TIMER DEVICE CONFIGURATION MACROS
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//**************************************************************************
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#define MDRV_TIMER_ADD(_tag, _callback) \
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MDRV_DEVICE_ADD(_tag, TIMER, 0) \
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timer_device_config::static_configure_generic(device, _callback); \
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#define MDRV_TIMER_ADD_PERIODIC(_tag, _callback, _period) \
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MDRV_DEVICE_ADD(_tag, TIMER, 0) \
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timer_device_config::static_configure_periodic(device, _callback, ATTOTIME_IN_##_period); \
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#define MDRV_TIMER_ADD_SCANLINE(_tag, _callback, _screen, _first_vpos, _increment) \
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MDRV_DEVICE_ADD(_tag, TIMER, 0) \
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timer_device_config::static_configure_scanline(device, _callback, _screen, _first_vpos, _increment); \
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#define MDRV_TIMER_MODIFY(_tag) \
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MDRV_DEVICE_MODIFY(_tag)
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#define MDRV_TIMER_CALLBACK(_callback) \
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timer_device_config::static_set_callback(device, _callback); \
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#define MDRV_TIMER_START_DELAY(_start_delay) \
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timer_device_config::static_set_start_delay(device, ATTOTIME_IN_##_start_delay); \
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#define MDRV_TIMER_PARAM(_param) \
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timer_device_config::static_set_param(device, _param); \
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#define MDRV_TIMER_PTR(_ptr) \
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timer_device_config::static_set_ptr(device, (void *)(_ptr)); \
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/***************************************************************************
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FUNCTION PROTOTYPES
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***************************************************************************/
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/* ----- initialization ----- */
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/* initialize the timer system */
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void timer_init(running_machine *machine);
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/* destruct a timer from a pool callback */
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void timer_destructor(void *ptr, size_t size);
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/* ----- scheduling helpers ----- */
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/* return a pointer to the execution state */
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timer_execution_state *timer_get_execution_state(running_machine *machine);
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/* execute timers and update scheduling quanta */
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void timer_execute_timers(running_machine *machine);
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/* add a scheduling quantum; the smallest active one is the one that is in use */
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void timer_add_scheduling_quantum(running_machine *machine, attoseconds_t quantum, attotime duration);
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/* control the minimum useful quantum (used by cpuexec only) */
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void timer_set_minimum_quantum(running_machine *machine, attoseconds_t quantum);
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/* ----- save/restore helpers ----- */
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/* count the number of anonymous (non-saveable) timers */
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int timer_count_anonymous(running_machine *machine);
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/* ----- core timer management ----- */
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/* allocate a permament timer that isn't primed yet */
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emu_timer *_timer_alloc_internal(running_machine *machine, timer_fired_func callback, void *param, const char *file, int line, const char *func);
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/* adjust the time when this timer will fire and disable any periodic firings */
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void timer_adjust_oneshot(emu_timer *which, attotime duration, INT32 param);
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/* adjust the time when this timer will fire and specify a period for subsequent firings */
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void timer_adjust_periodic(emu_timer *which, attotime start_delay, INT32 param, attotime period);
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/* ----- anonymous timer management ----- */
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/* allocate a one-shot timer, which calls the callback after the given duration */
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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);
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/* allocate a pulse timer, which repeatedly calls the callback using the given period */
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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);
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/* ----- miscellaneous controls ----- */
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/* reset the timing on a timer */
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void timer_reset(emu_timer *which, attotime duration);
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/* enable/disable a timer */
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int timer_enable(emu_timer *which, int enable);
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/* determine if a timer is enabled */
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int timer_enabled(emu_timer *which);
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/* returns the callback parameter of a timer */
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int timer_get_param(emu_timer *which);
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/* changes the callback parameter of a timer */
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void timer_set_param(emu_timer *which, int param);
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/* returns the callback pointer of a timer */
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void *timer_get_ptr(emu_timer *which);
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/* changes the callback pointer of a timer */
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void timer_set_ptr(emu_timer *which, void *ptr);
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/* ----- timing functions ----- */
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/* return the time since the last trigger */
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attotime timer_timeelapsed(emu_timer *which);
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/* return the time until the next trigger */
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attotime timer_timeleft(emu_timer *which);
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/* return the current time */
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attotime timer_get_time(running_machine *machine);
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/* return the time when this timer started counting */
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attotime timer_starttime(emu_timer *which);
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/* return the time when this timer will fire next */
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attotime timer_firetime(emu_timer *which);
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// ======================> timer_device_config
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class timer_device_config : public device_config
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{
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friend class timer_device;
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// construction/destruction
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timer_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
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public:
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// allocators
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static device_config *static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
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virtual device_t *alloc_device(running_machine &machine) const;
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// inline configuration helpers
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static void static_configure_generic(device_config *device, timer_device_fired_func callback);
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static void static_configure_periodic(device_config *device, timer_device_fired_func callback, attotime period);
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static void static_configure_scanline(device_config *device, timer_device_fired_func callback, const char *screen, int first_vpos, int increment);
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static void static_set_callback(device_config *device, timer_device_fired_func callback);
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static void static_set_start_delay(device_config *device, attotime delay);
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static void static_set_param(device_config *device, int param);
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static void static_set_ptr(device_config *device, void *ptr);
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private:
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// device_config overrides
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virtual bool device_validity_check(const game_driver &driver) const;
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// timer types
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enum timer_type
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{
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TIMER_TYPE_PERIODIC,
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TIMER_TYPE_SCANLINE,
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TIMER_TYPE_GENERIC
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};
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// configuration data
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timer_type m_type; // type of timer
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timer_device_fired_func m_callback; // the timer's callback function
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void * m_ptr; // the pointer parameter passed to the timer callback
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// periodic timers only
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attotime m_start_delay; // delay before the timer fires for the first time
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attotime m_period; // period of repeated timer firings
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INT32 m_param; // the integer parameter passed to the timer callback
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// scanline timers only
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const char * m_screen; // the name of the screen this timer tracks
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UINT32 m_first_vpos; // the first vertical scanline position the timer fires on
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UINT32 m_increment; // the number of scanlines between firings
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};
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// ======================> timer_device
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class timer_device : public device_t
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{
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friend class timer_device_config;
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// construction/destruction
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timer_device(running_machine &_machine, const timer_device_config &config);
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public:
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// property getters
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int param() const { return timer_get_param(m_timer); }
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void *ptr() const { return m_ptr; }
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bool enabled() const { return (timer_enabled(m_timer) != 0); }
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// property setters
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void set_param(int param) { assert(m_config.m_type == timer_device_config::TIMER_TYPE_GENERIC); timer_set_param(m_timer, param); }
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void set_ptr(void *ptr) { m_ptr = ptr; }
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void enable(bool enable = true) { timer_enable(m_timer, enable); }
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// adjustments
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void reset() { adjust(attotime_never, 0, attotime_never); }
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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); }
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// timing information
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attotime time_elapsed() const { return timer_timeelapsed(m_timer); }
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attotime time_left() const { return timer_timeleft(m_timer); }
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attotime start_time() const { return timer_starttime(m_timer); }
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attotime fire_time() const { return timer_firetime(m_timer); }
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private:
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// device-level overrides
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virtual void device_start();
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virtual void device_reset();
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// internal helpers
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static TIMER_CALLBACK( static_periodic_timer_callback ) { reinterpret_cast<timer_device *>(ptr)->periodic_timer_callback(param); }
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void periodic_timer_callback(int param);
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static TIMER_CALLBACK( static_scanline_timer_callback ) { reinterpret_cast<timer_device *>(ptr)->scanline_timer_callback(param); }
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void scanline_timer_callback(int scanline);
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// internal state
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const timer_device_config &m_config;
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emu_timer * m_timer; // the backing timer
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void * m_ptr; // the pointer parameter passed to the timer callback
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// scanline timers only
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screen_device *m_screen; // pointer to the screen
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bool m_first_time; // indicates that the system is starting
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};
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// device type definition
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extern const device_type TIMER;
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#endif /* __TIMER_H__ */
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