Rekai Musuka
e32d6534c6
some basic ROMs already boot (ARM946E-S only), working on Armwrestler and Rockwrestler next so I can ensure CPU compatability for but ARMv5TE and ARMv4T
60 lines
1.3 KiB
Zig
60 lines
1.3 KiB
Zig
const std = @import("std");
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const Bus = @import("Bus.zig");
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const PriorityQueue = std.PriorityQueue(Event, void, Event.lessThan);
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const Allocator = std.mem.Allocator;
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tick: u64 = 0,
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queue: PriorityQueue,
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pub fn init(allocator: Allocator) !@This() {
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var queue = PriorityQueue.init(allocator, {});
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try queue.add(.{ .tick = std.math.maxInt(u64), .kind = .heat_death });
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return .{ .queue = queue };
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}
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pub fn push(self: *@This(), kind: Event.Kind, offset: u64) void {
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self.queue.add(.{ .kind = kind, .tick = self.tick + offset }) catch unreachable;
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}
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pub fn deinit(self: @This()) void {
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self.queue.deinit();
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}
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pub fn now(self: @This()) u64 {
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return self.tick;
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}
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pub fn next(self: @This()) u64 {
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@setRuntimeSafety(false);
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return self.queue.items[0].tick;
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}
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pub fn reset(self: *@This()) void {
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self.tick = 0;
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}
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pub fn handle(self: *@This(), bus: *Bus) void {
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_ = bus;
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const event = self.queue.remove();
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const late = self.tick - event.tick;
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_ = late;
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switch (event.kind) {
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.heat_death => unreachable,
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}
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}
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pub const Event = struct {
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tick: u64,
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kind: Kind,
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pub const Kind = enum { heat_death };
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fn lessThan(_: void, left: @This(), right: @This()) std.math.Order {
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return std.math.order(left.tick, right.tick);
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}
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};
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