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cpuint: save the interrupt event queue in save states (#2048)

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This commit is contained in:
Federico Pereira
2026-10-09 03:07:45 -04:00
committed by GitHub
parent d73ba22c26
commit 97cb277199
1 changed files with 24 additions and 0 deletions
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src/cpuint.c
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@@ -62,6 +62,26 @@ static INT32 irq_line_vector[MAX_CPU][MAX_IRQ_LINES];
static INT32 irq_event_queue[MAX_CPU][MAX_IRQ_EVENTS];
static int irq_event_index[MAX_CPU];
static void cpu_empty_event_queue(int cpunum);
/* A save made at the end of a frame finds the VBLANK interrupt still in the
queue (it is emptied by a timer at the same time, which runs in the next
frame). The queue is saved with the game, and a load sets that timer again,
or the CPU misses that interrupt: a game that does its work every other
frame then runs one frame late after loading. */
static void cpuint_postload(void)
{
int cpunum;
for (cpunum = 0; cpunum < cpu_gettotalcpu(); cpunum++)
{
if (irq_event_index[cpunum] > MAX_IRQ_EVENTS)
irq_event_index[cpunum] = MAX_IRQ_EVENTS;
if (irq_event_index[cpunum] > 0)
timer_set(TIME_NOW, cpunum, cpu_empty_event_queue);
}
}
/*************************************
@@ -131,6 +151,10 @@ int cpuint_init(void)
state_save_register_INT32("cpu", 0, "irq vector", &interrupt_vector[0][0],cpu_gettotalcpu() * MAX_IRQ_LINES);
state_save_register_UINT8("cpu", 0, "irqline state", &irq_line_state[0][0], cpu_gettotalcpu() * MAX_IRQ_LINES);
state_save_register_INT32("cpu", 0, "irqline vector", &irq_line_vector[0][0], cpu_gettotalcpu() * MAX_IRQ_LINES);
state_save_register_INT32("cpu", 0, "irq event queue", &irq_event_queue[0][0], cpu_gettotalcpu() * MAX_IRQ_EVENTS);
for (cpunum = 0; cpunum < cpu_gettotalcpu(); cpunum++)
state_save_register_int("cpu", cpunum, "irq events", &irq_event_index[cpunum]);
state_save_register_func_postload(cpuint_postload);
return 0;
}