helper: turn [Helper] fields into [Arc]'s, add p2pool watchdog

src/helper.rs

@@ -38,7 +38,8 @@
 use std::{
 	sync::{Arc,Mutex},
 	path::PathBuf,
-	process::Command,
+	process::{Command,Stdio},
+	fmt::Write,
 	time::*,
 	thread,
 };
@@ -50,14 +51,14 @@ use log::*;
 //---------------------------------------------------------------------------------------------------- [Helper] Struct
 // A meta struct holding all the data that gets processed in this thread
 pub struct Helper {
-	pub instant: Instant,      // Gupax start as an [Instant]
-	pub human_time: HumanTime, // Gupax uptime formatting for humans
-	pub p2pool: Process,       // P2Pool process state
-	pub xmrig: Process,        // XMRig process state
-	pub pub_api_p2pool: PubP2poolApi, // P2Pool API state (for GUI thread)
-	pub pub_api_xmrig: PubXmrigApi,   // XMRig API state (for GUI thread)
-	priv_api_p2pool: PrivP2poolApi, // For "watchdog" thread
-	priv_api_xmrig: PrivXmrigApi,   // For "watchdog" thread
+	pub instant: Instant,                         // Gupax start as an [Instant]
+	pub human_time: HumanTime,                    // Gupax uptime formatting for humans
+	pub p2pool: Arc<Mutex<Process>>,              // P2Pool process state
+	pub xmrig: Arc<Mutex<Process>>,               // XMRig process state
+	pub pub_api_p2pool: Arc<Mutex<PubP2poolApi>>, // P2Pool API state (for GUI thread)
+	pub pub_api_xmrig: Arc<Mutex<PubXmrigApi>>,   // XMRig API state (for GUI thread)
+	priv_api_p2pool: Arc<Mutex<PrivP2poolApi>>,   // For "watchdog" thread
+	priv_api_xmrig: Arc<Mutex<PrivXmrigApi>>,     // For "watchdog" thread
 }
 
 // Impl found at the very bottom of this file.
@@ -328,41 +329,48 @@ impl Helper {
 		Self {
 			instant,
 			human_time: HumanTime::into_human(instant.elapsed()),
-			p2pool: Process::new(ProcessName::P2pool, String::new(), PathBuf::new()),
-			xmrig: Process::new(ProcessName::Xmrig, String::new(), PathBuf::new()),
-			pub_api_p2pool: PubP2poolApi::new(),
-			pub_api_xmrig: PubXmrigApi::new(),
-			priv_api_p2pool: PrivP2poolApi::new(),
-			priv_api_xmrig: PrivXmrigApi::new(),
+			p2pool: Arc::new(Mutex::new(Process::new(ProcessName::P2pool, String::new(), PathBuf::new()))),
+			xmrig: Arc::new(Mutex::new(Process::new(ProcessName::Xmrig, String::new(), PathBuf::new()))),
+			pub_api_p2pool: Arc::new(Mutex::new(PubP2poolApi::new())),
+			pub_api_xmrig: Arc::new(Mutex::new(PubXmrigApi::new())),
+			priv_api_p2pool: Arc::new(Mutex::new(PrivP2poolApi::new())),
+			priv_api_xmrig: Arc::new(Mutex::new(PrivXmrigApi::new())),
 		}
 	}
 
 	// The tokio runtime that blocks while async reading both STDOUT/STDERR
 	// Cheaper than spawning 2 OS threads just to read 2 pipes (...right? :D)
 	#[tokio::main]
-	async fn read_stdout_stderr(stdout: tokio::process::ChildStdout, stderr: tokio::process::ChildStderr) {
+	async fn read_stdout_stderr(process: &Arc<Mutex<Process>>, stdout: tokio::process::ChildStdout, stderr: tokio::process::ChildStderr) {
+		let process_stdout = Arc::clone(process);
+		let process_stderr = Arc::clone(process);
 		// Create STDOUT pipe job
 		let stdout_job = tokio::spawn(async move {
 			let mut stdout_reader = BufReader::new(stdout).lines();
 			while let Ok(Some(line)) = stdout_reader.next_line().await {
-				println!("{}", line);
+				writeln!(process_stdout.lock().unwrap().output, "{}", line);
 			}
 		});
 		// Create STDERR pipe job
 		let stderr_job = tokio::spawn(async move {
 			let mut stderr_reader = BufReader::new(stderr).lines();
 			while let Ok(Some(line)) = stderr_reader.next_line().await {
-			println!("{}", line);
+				writeln!(process_stderr.lock().unwrap().output, "{}", line);
 			}
 		});
 		// Block and read both until they are closed (automatic when process dies)
+		// The ordering of STDOUT/STDERR should be automatic thanks to the locks.
 		tokio::join![stdout_job, stderr_job];
 	}
 
 	//---------------------------------------------------------------------------------------------------- P2Pool specific
 	// Intermediate function that parses the arguments, and spawns the P2Pool watchdog thread.
-	pub fn spawn_p2pool(state: &crate::disk::P2pool, api_path: &std::path::Path) {
+	pub fn spawn_p2pool(helper: &Arc<Mutex<Self>>, state: &crate::disk::P2pool, path: std::path::PathBuf) {
 		let mut args = Vec::with_capacity(500);
+		let path = path.clone();
+		let mut api_path = path.clone();
+		api_path.pop();
+
 		// [Simple]
 		if state.simple {
 			// Build the p2pool argument
@@ -403,17 +411,43 @@ impl Helper {
 		crate::disk::print_dash(&format!("P2Pool | Launch arguments ... {:#?}", args));
 
 		// Spawn watchdog thread
+		let process = Arc::clone(&helper.lock().unwrap().p2pool);
+		let pub_api = Arc::clone(&helper.lock().unwrap().pub_api_p2pool);
+		let priv_api = Arc::clone(&helper.lock().unwrap().priv_api_p2pool);
 		thread::spawn(move || {
-			Self::spawn_p2pool_watchdog(args);
+			Self::spawn_p2pool_watchdog(process, pub_api, priv_api, args, path);
 		});
 	}
 
 	// The actual P2Pool watchdog tokio runtime.
 	#[tokio::main]
-	pub async fn spawn_p2pool_watchdog(args: Vec<String>) {
+	async fn spawn_p2pool_watchdog(process: Arc<Mutex<Process>>, pub_api: Arc<Mutex<PubP2poolApi>>, priv_api: Arc<Mutex<PrivP2poolApi>>, args: Vec<String>, path: std::path::PathBuf) {
 		// 1. Create command
-		// 2. Spawn STDOUT/STDERR thread
-		// 3. Loop forever as watchdog until process dies
+		let mut child = tokio::process::Command::new(path)
+			.args(args)
+			.stdout(Stdio::piped())
+			.stderr(Stdio::piped())
+			.stdin(Stdio::piped())
+			.spawn().unwrap();
+
+		// 2. Set start time
+		let now = Instant::now();
+		process.lock().unwrap().start = now;
+		process.lock().unwrap().uptime = HumanTime::into_human(now.elapsed());
+
+		// 3. Spawn STDOUT/STDERR thread
+		thread::spawn(move || {
+			Self::read_stdout_stderr(&process, child.stdout.take().unwrap(), child.stderr.take().unwrap());
+		});
+
+		// 4. Loop forever as watchdog until process dies
+		loop {
+			// a. Watch user SIGNAL
+			// b. Create STDIN task
+			// c. Create API task
+			// d. Execute async tasks
+			// e. Sleep (900ms)
+		}
 	}
 
 	//---------------------------------------------------------------------------------------------------- XMRig specific
@@ -480,38 +514,6 @@ impl Helper {
 		// 2. Loop init timestamp
 		let start = Instant::now();
 
-		// 3. Spawn child processes (if signal found)
-		let h = helper.lock().unwrap();
-		if let ProcessSignal::Start = h.p2pool.signal {
-			// Start outer thread, start inner stdout/stderr pipe, loop in outer thread for stdin/signal/etc
-			if !h.p2pool.input.is_empty() {
-				// Process STDIN
-			}
-		}
-		drop(h);
-		let h = helper.lock().unwrap();
-		if let ProcessSignal::Start = h.xmrig.signal {
-			// Start outer thread, start inner stdout/stderr pipe, loop in outer thread for stdin/signal/etc
-			if !h.xmrig.input.is_empty() {
-				// Process STDIN
-			}
-		}
-		drop(h);
-
-		// 4. Collect P2Pool API task (if alive)
-		let h = helper.lock().unwrap();
-		if let ProcessState::Alive = h.p2pool.state {
-		}
-		// 5. Collect XMRig HTTP API task (if alive)
-		if let ProcessState::Alive = h.xmrig.state {
-		}
-		drop(h);
-
-		// 6. Execute all async tasks
-//		for job in jobs {
-//			job.await;
-//		}
-
 		// 7. Set Gupax/P2Pool/XMRig uptime
 		let mut h = helper.lock().unwrap();
 		h.human_time = HumanTime::into_human(h.instant.elapsed());