mirror of
https://github.com/holub/mame
synced 2025-05-22 13:48:55 +03:00
ce83de86a8
fixes up some header files. In particular, I adjusted const char *DEVTEMPLATE_SOURCE = __FILE__ to const char DEVTEMPLATE_SOURCE[] = __FILE__ which makes it actually const and saves a little memory. [Atari Ace]
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/***************************************************************************
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watchdog.c
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Watchdog handling
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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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#include "driver.h"
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/***************************************************************************
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GLOBAL VARIABLES
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***************************************************************************/
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static UINT8 watchdog_enabled;
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static INT32 watchdog_counter;
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static emu_timer *watchdog_timer;
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/***************************************************************************
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FUNCTION PROTOTYPES
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***************************************************************************/
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static void watchdog_internal_reset(running_machine *machine);
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static TIMER_CALLBACK( watchdog_callback );
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/*-------------------------------------------------
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watchdog_init - one time initialization
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-------------------------------------------------*/
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void watchdog_init(running_machine *machine)
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{
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/* allocate a timer for the watchdog */
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watchdog_timer = timer_alloc(machine, watchdog_callback, NULL);
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add_reset_callback(machine, watchdog_internal_reset);
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/* save some stuff in the default tag */
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state_save_register_item(machine, "watchdog", NULL, 0, watchdog_enabled);
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state_save_register_item(machine, "watchdog", NULL, 0, watchdog_counter);
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}
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/*-------------------------------------------------
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watchdog_internal_reset - reset the watchdog
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system
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-------------------------------------------------*/
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static void watchdog_internal_reset(running_machine *machine)
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{
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/* set up the watchdog timer; only start off enabled if explicitly configured */
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watchdog_enabled = (machine->config->watchdog_vblank_count != 0 || attotime_compare(machine->config->watchdog_time, attotime_zero) != 0);
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watchdog_reset(machine);
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watchdog_enabled = TRUE;
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}
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/*-------------------------------------------------
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watchdog_callback - watchdog timer callback
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-------------------------------------------------*/
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static TIMER_CALLBACK( watchdog_callback )
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{
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logerror("Reset caused by the watchdog!!!\n");
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#ifdef MAME_DEBUG
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popmessage("Reset caused by the watchdog!!!\n");
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#endif
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mame_schedule_soft_reset(machine);
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}
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/*-------------------------------------------------
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on_vblank - updates VBLANK based watchdog
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timers
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-------------------------------------------------*/
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static void on_vblank(const device_config *screen, void *param, int vblank_state)
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{
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/* VBLANK starting */
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if (vblank_state && watchdog_enabled)
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{
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/* check the watchdog */
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if (screen->machine->config->watchdog_vblank_count != 0)
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{
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watchdog_counter = watchdog_counter - 1;
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if (watchdog_counter == 0)
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watchdog_callback(screen->machine, NULL, 0);
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}
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}
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}
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/*-------------------------------------------------
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watchdog_reset - reset the watchdog timer
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-------------------------------------------------*/
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void watchdog_reset(running_machine *machine)
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{
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/* if we're not enabled, skip it */
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if (!watchdog_enabled)
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timer_adjust_oneshot(watchdog_timer, attotime_never, 0);
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/* VBLANK-based watchdog? */
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else if (machine->config->watchdog_vblank_count != 0)
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{
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watchdog_counter = machine->config->watchdog_vblank_count;
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/* register a VBLANK callback for the primary screen */
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if (machine->primary_screen != NULL)
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video_screen_register_vblank_callback(machine->primary_screen, on_vblank, NULL);
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}
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/* timer-based watchdog? */
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else if (attotime_compare(machine->config->watchdog_time, attotime_zero) != 0)
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timer_adjust_oneshot(watchdog_timer, machine->config->watchdog_time, 0);
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/* default to an obscene amount of time (3 seconds) */
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else
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timer_adjust_oneshot(watchdog_timer, ATTOTIME_IN_SEC(3), 0);
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}
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/*-------------------------------------------------
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watchdog_enable - reset the watchdog timer
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-------------------------------------------------*/
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void watchdog_enable(running_machine *machine, int enable)
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{
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/* when re-enabled, we reset our state */
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if (watchdog_enabled != enable)
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{
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watchdog_enabled = enable;
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watchdog_reset(machine);
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}
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}
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