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/***************************************************************************
timer.c
Timer devices.
****************************************************************************
Copyright Aaron Giles
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#include "emu.h"
/***************************************************************************
// DEBUGGING
***************************************************************************/
#define VERBOSE 0
#define LOG(x) do { if (VERBOSE) logerror x; } while (0)
//**************************************************************************
// LIVE TIMER DEVICE
//**************************************************************************
const device_type TIMER = &device_creator<timer_device>;
//-------------------------------------------------
// timer_device - constructor
//-------------------------------------------------
timer_device::timer_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, TIMER, "Timer", tag, owner, clock),
m_type(TIMER_TYPE_GENERIC),
m_callback(timer_device_expired_delegate()),
m_ptr(NULL),
m_start_delay(attotime::zero),
m_period(attotime::zero),
m_param(0),
m_screen_tag(NULL),
m_screen(NULL),
m_first_vpos(0),
m_increment(0),
m_timer(NULL),
m_first_time(true)
{
}
//-------------------------------------------------
// static_configure_generic - configuration
// helper to set up a generic timer
//-------------------------------------------------
void timer_device::static_configure_generic(device_t &device, timer_device_expired_delegate callback)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_type = TIMER_TYPE_GENERIC;
timer.m_callback = callback;
}
//-------------------------------------------------
// static_configure_periodic - configuration
// helper to set up a periodic timer
//-------------------------------------------------
void timer_device::static_configure_periodic(device_t &device, timer_device_expired_delegate callback, attotime period)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_type = TIMER_TYPE_PERIODIC;
timer.m_callback = callback;
timer.m_period = period;
}
//-------------------------------------------------
// static_configure_scanline - configuration
// helper to set up a scanline timer
//-------------------------------------------------
void timer_device::static_configure_scanline(device_t &device, timer_device_expired_delegate callback, const char *screen, int first_vpos, int increment)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_type = TIMER_TYPE_SCANLINE;
timer.m_callback = callback;
timer.m_screen_tag = screen;
timer.m_first_vpos = first_vpos;
timer.m_increment = increment;
}
//-------------------------------------------------
// static_set_callback - configuration helper
// to set the callback
//-------------------------------------------------
void timer_device::static_set_callback(device_t &device, timer_device_expired_delegate callback)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_callback = callback;
}
//-------------------------------------------------
// static_set_start_delay - configuration helper
// to set the starting delay
//-------------------------------------------------
void timer_device::static_set_start_delay(device_t &device, attotime delay)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_start_delay = delay;
}
//-------------------------------------------------
// static_set_param - configuration helper to set
// the integer parameter
//-------------------------------------------------
void timer_device::static_set_param(device_t &device, int param)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_param = param;
}
//-------------------------------------------------
// static_set_ptr - configuration helper to set
// the pointer parameter
//-------------------------------------------------
void timer_device::static_set_ptr(device_t &device, void *ptr)
{
timer_device &timer = downcast<timer_device &>(device);
timer.m_ptr = ptr;
}
//-------------------------------------------------
// device_validity_check - validate the device
// configuration
//-------------------------------------------------
void timer_device::device_validity_check(validity_checker &valid) const
{
// type based configuration
switch (m_type)
{
case TIMER_TYPE_GENERIC:
if (m_screen_tag != NULL || m_first_vpos != 0 || m_start_delay != attotime::zero)
mame_printf_warning("Generic timer specified parameters for a scanline timer\n");
if (m_period != attotime::zero || m_start_delay != attotime::zero)
mame_printf_warning("Generic timer specified parameters for a periodic timer\n");
break;
case TIMER_TYPE_PERIODIC:
if (m_screen_tag != NULL || m_first_vpos != 0)
mame_printf_warning("Periodic timer specified parameters for a scanline timer\n");
if (m_period <= attotime::zero)
mame_printf_error("Periodic timer specified invalid period\n");
break;
case TIMER_TYPE_SCANLINE:
if (m_period != attotime::zero || m_start_delay != attotime::zero)
mame_printf_warning("Scanline timer specified parameters for a periodic timer\n");
if (m_param != 0)
mame_printf_warning("Scanline timer specified parameter which is ignored\n");
// if (m_first_vpos < 0)
// mame_printf_error("Scanline timer specified invalid initial position\n");
// if (m_increment < 0)
// mame_printf_error("Scanline timer specified invalid increment\n");
break;
default:
mame_printf_error("Invalid type specified\n");
break;
}
}
//-------------------------------------------------
// device_start - perform device-specific
// startup
//-------------------------------------------------
void timer_device::device_start()
{
// fetch the screen
if (m_screen_tag != NULL)
m_screen = machine().device<screen_device>(m_screen_tag);
// allocate the timer
m_timer = timer_alloc();
m_callback.bind_relative_to(*owner());
// register for save states
save_item(NAME(m_first_time));
}
//-------------------------------------------------
// device_reset - reset the device
//-------------------------------------------------
void timer_device::device_reset()
{
// type based configuration
switch (m_type)
{
case TIMER_TYPE_GENERIC:
case TIMER_TYPE_PERIODIC:
{
// convert the period into attotime
attotime period = attotime::never;
if (m_period > attotime::zero)
{
period = m_period;
// convert the start_delay into attotime
attotime start_delay = attotime::zero;
if (m_start_delay > attotime::zero)
start_delay = m_start_delay;
// allocate and start the backing timer
m_timer->adjust(start_delay, m_param, period);
}
break;
}
case TIMER_TYPE_SCANLINE:
if (m_screen == NULL)
fatalerror("timer '%s': unable to find screen '%s'\n", tag(), m_screen_tag);
// set the timer to to fire immediately
m_first_time = true;
m_timer->adjust(attotime::zero, m_param);
break;
}
}
//-------------------------------------------------
// device_timer - handle timer expiration events
//-------------------------------------------------
void timer_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (m_type)
{
// general periodic timers just call through
case TIMER_TYPE_GENERIC:
case TIMER_TYPE_PERIODIC:
if (!m_callback.isnull())
(m_callback)(*this, m_ptr, param);
break;
// scanline timers have to do some additiona bookkeeping
case TIMER_TYPE_SCANLINE:
{
// by default, we fire at the first position
int next_vpos = m_first_vpos;
// the first time through we just go with the default position
if (!m_first_time)
{
// call the real callback
int vpos = m_screen->vpos();
if (!m_callback.isnull())
(m_callback)(*this, m_ptr, vpos);
// advance by the increment only if we will still be within the screen bounds
if (m_increment != 0 && (vpos + m_increment) < m_screen->height())
next_vpos = vpos + m_increment;
}
m_first_time = false;
// adjust the timer
m_timer->adjust(m_screen->time_until_pos(next_vpos));
break;
}
}
}
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