Take direct control of the tokio runtime

Since the GTK thread wants to be the main one, it's easier to manually spawn the runtime handlers and to spawn new tasks to handle communication with the core. I added a basic struct to own the runtime, the core, and communication between the core and GTK

kifu/kifu-core/Cargo.lock

@@ -8,6 +8,33 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bytes"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "hermit-abi"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "kifu-core"
 version = "0.1.0"
@@ -15,12 +42,157 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "lock_api"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "435011366fe56583b16cf956f9df0095b405b82d76425bc8981c0e22e60ec4df"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "mio"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b9d9a46eff5b4ff64b45a9e316a6d1e0bc719ef429cbec4dc630684212bfdf9"
+dependencies = [
+ "libc",
+ "log",
+ "wasi",
+ "windows-sys",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9069cbb9f99e3a5083476ccb29ceb1de18b9118cafa53e90c9551235de2b9521"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-sys",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.52"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d0e1ae9e836cc3beddd63db0df682593d7e2d3d891ae8c9083d2113e1744224"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
+
+[[package]]
+name = "socket2"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64a4a911eed85daf18834cfaa86a79b7d266ff93ff5ba14005426219480ed662"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "tokio"
 version = "1.26.0"
@@ -28,10 +200,64 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "03201d01c3c27a29c8a5cee5b55a93ddae1ccf6f08f65365c2c918f8c1b76f64"
 dependencies = [
  "autocfg",
+ "bytes",
+ "libc",
+ "memchr",
+ "mio",
+ "num_cpus",
+ "parking_lot",
  "pin-project-lite",
+ "signal-hook-registry",
+ "socket2",
+ "tokio-macros",
  "windows-sys",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d266c00fde287f55d3f1c3e96c500c362a2b8c695076ec180f27918820bc6df8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-sys"
 version = "0.45.0"

kifu/kifu-core/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tokio = { version = "1.26", features = [ "sync" ] }
+tokio = { version = "1.26", features = [ "full" ] }

kifu/kifu-core/src/api.rs

@@ -16,41 +16,23 @@ pub enum Response {
     PlayingFieldView(PlayingFieldView),
 }
 
-fn dispatch(state: Arc<RwLock<AppState>>, request: Request) -> Response {
+#[derive(Clone)]
+pub struct CoreApp {
+    state: Arc<RwLock<AppState>>,
+}
+
+impl CoreApp {
+    pub fn new() -> Self {
+        let state = Arc::new(RwLock::new(AppState::new()));
+
+        Self { state }
+    }
+
+    pub async fn dispatch(&self, request: Request) -> Response {
         match request {
             Request::PlayingField => Response::PlayingFieldView(playing_field()),
         }
     }
 
-pub struct CoreApp {
+    pub async fn run(&self) {}
-    request_rx: Receiver<Request>,
-    response_tx: Sender<Response>,
-    state: Arc<RwLock<AppState>>,
-}
-
-impl CoreApp {
-    pub fn new() -> (Self, Sender<Request>, Receiver<Response>) {
-        let (request_tx, request_rx) = channel(5);
-        let (response_tx, response_rx) = channel(5);
-
-        let state = Arc::new(RwLock::new(AppState::new()));
-
-        (
-            Self {
-                request_rx,
-                response_tx,
-                state,
-            },
-            request_tx,
-            response_rx,
-        )
-    }
-
-    pub async fn run(&mut self) {
-        loop {
-            let msg = self.request_rx.recv().await.unwrap();
-            let resp = dispatch(self.state.clone(), msg);
-            self.response_tx.send(resp).await.unwrap();
-        }
-    }
 }

kifu/kifu-gtk/src/main.rs

@@ -4,55 +4,75 @@ use std::{
     sync::{Arc, Mutex},
     time::Duration,
 };
-use tokio::sync::mpsc::{Receiver, Sender};
+use tokio::{
+    runtime::Runtime,
+    sync::mpsc::{Receiver, Sender},
+};
 
-#[tokio::main]
+#[derive(Clone)]
-async fn main() {
+pub struct CoreApi {
-    let (mut core, request_tx, response_rx) = CoreApp::new();
+    gtk_tx: gtk::glib::Sender<Response>,
-    let core_handle = tokio::spawn(async move {
+    rt: Arc<Runtime>,
+    core: CoreApp,
+}
+
+impl CoreApi {
+    pub fn dispatch(&self, request: Request) {
+        self.rt.spawn({
+            let gtk_tx = self.gtk_tx.clone();
+            let core = self.core.clone();
+            async move { gtk_tx.send(core.dispatch(request).await) }
+        });
+    }
+}
+
+fn main() {
+    let runtime = Arc::new(
+        tokio::runtime::Builder::new_multi_thread()
+            .enable_all()
+            .build()
+            .unwrap(),
+    );
+
+    let core = CoreApp::new();
+
+    let core_handle = runtime.spawn({
+        let core = core.clone();
+        async move {
             core.run().await;
+        }
     });
 
-    let gtk_handle = tokio::task::spawn_blocking(move || {
     let app = gtk::Application::builder()
         .application_id("com.luminescent-dreams.kifu-gtk")
         .build();
 
-        let _ = tokio::spawn({
+    app.connect_activate({
-            let request_tx = request_tx.clone();
+        let runtime = runtime.clone();
-            async move {
+        move |app| {
-                let _ = request_tx.send(Request::PlayingField).await;
-            }
-        });
-
-        app.connect_activate(move |app| {
             let (gtk_tx, gtk_rx) =
                 gtk::glib::MainContext::channel::<Response>(gtk::glib::PRIORITY_DEFAULT);
 
-            let _ = tokio::task::spawn(connector(gtk_tx, response_rx));
+            let api = CoreApi {
+                gtk_tx,
+                rt: runtime.clone(),
+                core: core.clone(),
+            };
 
             let window = gtk::ApplicationWindow::new(app);
             window.present();
+
             gtk_rx.attach(None, |message| {
                 println!("message: {:?}", message);
                 Continue(true)
             });
+
+            api.dispatch(Request::PlayingField);
+        }
     });
 
     println!("running the gtk loop");
     app.run();
-    });
 
-    core_handle.await;
+    let _ = runtime.block_on(async { core_handle.await });
-    gtk_handle.await;
-}
-
-async fn connector(gtk_tx: gtk::glib::Sender<Response>, mut response_rx: Receiver<Response>) {
-    loop {
-        let msg = response_rx.recv().await;
-        match msg {
-            Some(msg) => gtk_tx.send(msg).unwrap(),
-            None => (),
-        }
-    }
 }