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chore(ui): rewrite channel implementation

This commit is contained in:
Rekai Nyangadzayi Musuka 2023-05-23 22:48:58 -05:00
parent 16c3eceffd
commit ccdc2cbad4
4 changed files with 49 additions and 59 deletions
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2
lib/zba-util

@ -1 +1 @@
Subproject commit 72349459ec29ee2d910a3dd3274be00254a7acd4
Subproject commit 77d11c9903d7f4a3a31ef59fc954421d7dfa0eb1

28
src/core/emu.zig
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@ -5,7 +5,9 @@ const config = @import("../config.zig");
const Scheduler = @import("scheduler.zig").Scheduler;
const Arm7tdmi = @import("cpu.zig").Arm7tdmi;
const Tracker = @import("../util.zig").FpsTracker;
const TwoWayChannel = @import("zba-util").TwoWayChannel;
const Channel = @import("zba-util").Channel(Message, 0x100);
pub const Message = enum { Pause, Resume, Quit };
const Timer = std.time.Timer;
@ -35,18 +37,18 @@ const RunKind = enum {
LimitedFPS,
};
pub fn run(cpu: *Arm7tdmi, scheduler: *Scheduler, tracker: *Tracker, channel: *TwoWayChannel) void {
pub fn run(cpu: *Arm7tdmi, scheduler: *Scheduler, tracker: *Tracker, rx: Channel.Receiver) void {
const audio_sync = config.config().guest.audio_sync and !config.config().host.mute;
if (audio_sync) log.info("Audio sync enabled", .{});
if (config.config().guest.video_sync) {
inner(.LimitedFPS, audio_sync, cpu, scheduler, tracker, channel);
inner(.LimitedFPS, audio_sync, cpu, scheduler, tracker, rx);
} else {
inner(.UnlimitedFPS, audio_sync, cpu, scheduler, tracker, channel);
inner(.UnlimitedFPS, audio_sync, cpu, scheduler, tracker, rx);
}
}
fn inner(comptime kind: RunKind, audio_sync: bool, cpu: *Arm7tdmi, scheduler: *Scheduler, tracker: ?*Tracker, channel: *TwoWayChannel) void {
fn inner(comptime kind: RunKind, audio_sync: bool, cpu: *Arm7tdmi, scheduler: *Scheduler, tracker: ?*Tracker, rx: Channel.Receiver) void {
if (kind == .UnlimitedFPS or kind == .LimitedFPS) {
std.debug.assert(tracker != null);
log.info("FPS tracking enabled", .{});
@ -59,13 +61,9 @@ fn inner(comptime kind: RunKind, audio_sync: bool, cpu: *Arm7tdmi, scheduler: *S
log.info("Emulation w/out video sync", .{});
while (true) {
if (channel.emu.pop()) |e| switch (e) {
if (rx.recv()) |m| switch (m) {
.Quit => break,
.Resume => paused = false,
.Pause => {
paused = true;
channel.gui.push(.Paused);
},
.Resume, .Pause => paused = m == .Pause,
};
if (paused) continue;
@ -82,13 +80,9 @@ fn inner(comptime kind: RunKind, audio_sync: bool, cpu: *Arm7tdmi, scheduler: *S
var wake_time: u64 = frame_period;
while (true) {
if (channel.emu.pop()) |e| switch (e) {
if (rx.recv()) |m| switch (m) {
.Quit => break,
.Resume => paused = false,
.Pause => {
paused = true;
channel.gui.push(.Paused);
},
.Resume, .Pause => paused = m == .Pause,
};
if (paused) continue;

14
src/main.zig
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@ -6,7 +6,7 @@ const clap = @import("clap");
const config = @import("config.zig");
const emu = @import("core/emu.zig");
const TwoWayChannel = @import("zba-util").TwoWayChannel;
const Channel = @import("zba-util").Channel(emu.Message, 0x100);
const Gui = @import("platform.zig").Gui;
const Bus = @import("core/Bus.zig");
const Arm7tdmi = @import("core/cpu.zig").Arm7tdmi;
@ -98,8 +98,8 @@ pub fn main() void {
var quit = std.atomic.Atomic(bool).init(false);
var items: [0x100]u8 = undefined;
var channel = TwoWayChannel.init(&items);
var ch = Channel.init(allocator) catch |e| exitln("failed to initialize ui -> emu thread message channel: {}", .{e});
defer ch.deinit(allocator);
if (result.args.gdb != 0) {
const Server = @import("gdbstub").Server;
@ -122,22 +122,22 @@ pub fn main() void {
gui.run(.Debug, .{
.cpu = &cpu,
.scheduler = &scheduler,
.channel = &channel,
.ch = ch.tx,
}) catch |e| exitln("main thread panicked: {}", .{e});
} else {
var tracker = FpsTracker.init();
// emu should start paused if there's no ROM to run
if (paths.rom == null)
channel.emu.push(.Pause);
ch.tx.send(.Pause);
const thread = std.Thread.spawn(.{}, emu.run, .{ &cpu, &scheduler, &tracker, &channel }) catch |e| exitln("emu thread panicked: {}", .{e});
const thread = std.Thread.spawn(.{}, emu.run, .{ &cpu, &scheduler, &tracker, ch.rx }) catch |e| exitln("emu thread panicked: {}", .{e});
defer thread.join();
gui.run(.Standard, .{
.cpu = &cpu,
.scheduler = &scheduler,
.channel = &channel,
.ch = ch.tx,
.tracker = &tracker,
}) catch |e| exitln("main thread panicked: {}", .{e});
}

64
src/platform.zig
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@ -11,7 +11,7 @@ const Apu = @import("core/apu.zig").Apu;
const Arm7tdmi = @import("core/cpu.zig").Arm7tdmi;
const Scheduler = @import("core/scheduler.zig").Scheduler;
const FpsTracker = @import("util.zig").FpsTracker;
const TwoWayChannel = @import("zba-util").TwoWayChannel;
const Channel = @import("zba-util").Channel(emu.Message, 0x100);
const KeyInput = @import("core/bus/io.zig").KeyInput;
const gba_width = @import("core/ppu.zig").width;
@ -94,7 +94,7 @@ pub const Gui = struct {
}
const RunOptions = struct {
channel: *TwoWayChannel,
ch: Channel.Sender,
tracker: ?*FpsTracker = null,
cpu: *Arm7tdmi,
scheduler: *Scheduler,
@ -105,7 +105,7 @@ pub const Gui = struct {
pub fn run(self: *Self, comptime mode: RunMode, opt: RunOptions) !void {
const cpu = opt.cpu;
const tracker = opt.tracker;
const channel = opt.channel;
const ch = opt.ch;
const objects = opengl_impl.createObjects();
defer gl.deleteBuffers(3, @as(*const [3]GLuint, &.{ objects.vao, objects.vbo, objects.ebo }));
@ -193,54 +193,50 @@ pub const Gui = struct {
switch (self.state.emulation) {
.Transition => |inner| switch (inner) {
.Active => {
_ = channel.gui.pop();
channel.emu.push(.Resume);
ch.send(.Resume);
if (!config.config().host.mute) SDL.SDL_PauseAudioDevice(self.audio.device, 0);
self.state.emulation = .Active;
},
.Inactive => {
// Assert that double pausing is impossible
if (channel.gui.peek()) |value|
std.debug.assert(value != .Paused);
SDL.SDL_PauseAudioDevice(self.audio.device, 1);
channel.emu.push(.Pause);
ch.send(.Pause);
self.state.emulation = .Inactive;
},
},
.Active => skip_draw: {
.Active => {
const is_std = mode == .Standard;
if (is_std) channel.emu.push(.Pause);
defer if (is_std) channel.emu.push(.Resume);
if (is_std) ch.send(.Pause);
defer if (is_std) ch.send(.Resume);
switch (mode) {
.Standard => blk: {
const limit = 15; // TODO: What should this be?
// switch (mode) {
// .Standard => blk: {
// const limit = 15; // TODO: What should this be?
// TODO: learn more about std.atomic.spinLoopHint();
for (0..limit) |_| {
const message = channel.gui.pop() orelse continue;
// // TODO: learn more about std.atomic.spinLoopHint();
// for (0..limit) |_| {
// const message = channel.gui.pop() orelse continue;
switch (message) {
.Paused => break :blk,
.Quit => unreachable,
}
}
// switch (message) {
// .Paused => break :blk,
// .Quit => unreachable,
// }
// }
log.info("timed out waiting for emu thread to pause (limit: {})", .{limit});
break :skip_draw;
},
.Debug => blk: {
switch (channel.gui.pop() orelse break :blk) {
.Paused => unreachable, // only in standard mode
.Quit => break :emu_loop, // FIXME: gdb side of emu is seriously out-of-date...
}
},
}
// log.info("timed out waiting for emu thread to pause (limit: {})", .{limit});
// break :skip_draw;
// },
// .Debug => blk: {
// switch (channel.gui.pop() orelse break :blk) {
// .Paused => unreachable, // only in standard mode
// .Quit => break :emu_loop, // FIXME: gdb side of emu is seriously out-of-date...
// }
// },
// }
// Add FPS count to the histogram
if (tracker) |t| self.state.fps_hist.push(t.value()) catch {};
@ -279,7 +275,7 @@ pub const Gui = struct {
SDL.SDL_GL_SwapWindow(self.window);
}
channel.emu.push(.Quit);
ch.send(.Quit);
}
fn glGetProcAddress(ctx: SDL.SDL_GLContext, proc: [:0]const u8) ?*anyopaque {