simkir/zig-a-puzzle-a-day
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Stop sleeping, I guess

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This commit is contained in:
Simen Kirkvik
2026-05-05 22:11:17 +02:00
parent 7d41c3b7b1
commit 10365c135b
1 changed files with 21 additions and 58 deletions
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src/main.zig
+21 -58
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@@ -948,8 +948,9 @@ pub fn main(init: std.process.Init) u8 {
const monitor_update_hz: f64 = 30;
const game_update_hz: f64 = monitor_update_hz;
const frame_target_time_s: f64 = 1.0 / game_update_hz;
const frame_target_time_ms: f64 = std.time.ms_per_s * frame_target_time_s;
const frame_target_time_ns = std.Io.Duration.fromNanoseconds(std.time.ns_per_ms * @as(u64, @intFromFloat(frame_target_time_ms)));
// const frame_target_time_ms: f64 = std.time.ms_per_s * frame_target_time_s;
// const frame_target_time_ns = std.Io.Duration.fromNanoseconds(std.time.ns_per_ms * @as(u64, @intFromFloat(frame_target_time_ms)));
// const frame_target_time = std.Io.Duration.fromNanoseconds(@intFromFloat(std.time.ns_per_s * frame_target_time_s));
// Memory
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
@@ -973,7 +974,7 @@ pub fn main(init: std.process.Init) u8 {
std.debug.print("[Wayland] Added frame callback with ret {d}.\n", .{ret});
}
var start = std.Io.Clock.Timestamp.now(io, clock);
var start = clock.now(io);
var frame_count: u32 = 0;
@@ -985,41 +986,7 @@ pub fn main(init: std.process.Init) u8 {
},
};
while (wl_state.running) {
// pollEvents(&wl_state, &fds);
var count: u32 = 0;
outer: while (true) {
const cont = std.posix.poll(&fds, 0) catch |err| {
switch (err) {
error.Unexpected => {
std.debug.print("Poll error: Unexpected.\n", .{});
},
error.SystemResources => {
std.debug.print("Poll error: SystemResources: Kernel has no space for table allocations.\n", .{});
},
else => {
std.debug.print("Poll error: network stuff idk.\n", .{});
},
}
return 0;
};
if (cont == 0) break;
for (fds) |fd| {
if (fd.revents & std.posix.POLL.IN > 0) {
const ret = c.wl_display_dispatch(wl_state.display);
count += 1;
if (ret < 0) {
std.debug.print("Dispatch error {d}.\n", .{ret});
wl_state.running = false;
break :outer;
}
}
}
}
std.debug.print("[Wayland] Polled and dispatched {d} events.\n", .{count});
pollEvents(&wl_state, &fds);
if (wl_state.resize) {
const new_pool = createSharedMemoryPool(wl_state) catch {
@@ -1077,23 +1044,21 @@ pub fn main(init: std.process.Init) u8 {
const render_end_time = clock.now(io);
const render_time = render_start_time.durationTo(render_end_time);
std.debug.print("[Wayland] Render: {f}ms.\n", .{render_time});
std.debug.print("[Wayland] Render: {f}.\n", .{render_time});
var sleep_time = std.Io.Timestamp.now(io, clock);
sleep_time = sleep_time.addDuration(frame_target_time_ns);
if (render_time.toNanoseconds() < frame_target_time_ns.toNanoseconds()) {
sleep_time = sleep_time.subDuration(render_time);
std.debug.print("[Wayland] Sleeping: {d}ms.\n", .{sleep_time});
const with_clock = std.Io.Timestamp.withClock(sleep_time, clock);
const timeout = std.Io.Timeout{ .deadline = with_clock };
timeout.sleep(io) catch {
std.debug.print("[Wayland] Error sleeping\n", .{});
return 1;
};
} else {
sleep_time = std.Io.Timestamp.zero;
std.debug.print("[Wayland] MISSED FRAME\n", .{});
}
// if (render_time.toNanoseconds() < frame_target_time_ns.toNanoseconds()) {
// const sleep_duration: std.Io.Clock.Duration = .{
// .raw = .{ .nanoseconds = frame_target_time.nanoseconds - render_time.nanoseconds },
// .clock = clock,
// };
// std.debug.print("[Wayland] Sleeping: {f}.\n", .{sleep_duration.raw});
// sleep_duration.sleep(io) catch {
// std.debug.print("[Wayland] Error sleeping\n", .{});
// return 1;
// };
// } else {
// std.debug.print("[Wayland] MISSED FRAME\n", .{});
// }
c.wl_surface_attach(wl_state.surface, wl_state.buffer, 0, 0);
c.wl_surface_damage_buffer(wl_state.surface, 0, 0, wl_state.window_width, wl_state.window_height);
@@ -1103,16 +1068,14 @@ pub fn main(init: std.process.Init) u8 {
wl_state.frame_commited = false;
// std.posix.nanosleep(0, std.time.ns_per_ms * 32);
const last = std.Io.Clock.Timestamp.now(io, clock);
const last = clock.now(io);
const current = start.durationTo(last);
start = last;
// std.debug.print(
// "[Wayland] Render: {d:2.3}ms, Sleeping: {d:2.3}ms, Frame: {d:.3}ms.\n",
// .{ render_time_ms, sleep_time_ms, current_ms },
// );
std.debug.print("[Wayland] Frame done: {f}ms.\n", .{current.raw});
std.debug.print("[Wayland] Frame done: {f}.\n", .{current});
frame_count += 1;
}