feat: add warning popup for windows about xmrig outside of Gupaxx

if an xmrig instance run on Windows OS outside of Gupaxx, the later can
freeze since xmrig has been started without "below priority". A popup
warning the user in the case a xmrig instance is detected whithout the
xmrig process started in Gupaxx is added in this commit.

src/app/eframe_impl.rs

@@ -1,4 +1,8 @@
 use super::App;
+#[cfg(target_os = "windows")]
+use crate::errors::{process_running, ErrorButtons, ErrorFerris};
+#[cfg(target_os = "windows")]
+use crate::helper::ProcessName;
 use crate::helper::ProcessState;
 use crate::macros::lock;
 use crate::SECOND;
@@ -63,7 +67,16 @@ impl eframe::App for App {
             self.size.y = ui.available_height();
         });
         self.resize(ctx);
-
+        // check for windows that a local instance of xmrig is not running outside of Gupaxx. Important because it could lead to crashes on this platform.
+        // Warn only once per restart of Gupaxx.
+        #[cfg(target_os = "windows")]
+        if !self.xmrig_outside_warning_acknowledge
+            && process_running(ProcessName::Xmrig)
+            && !xmrig_is_alive
+        {
+            self.error_state.set("An instance of xmrig is running outside of Gupaxx.\nThis is not supported and could lead to crashes on this platform.\nPlease stop your local instance and start xmrig from Gupaxx Xmrig tab.", ErrorFerris::Error, ErrorButtons::Okay);
+            self.xmrig_outside_warning_acknowledge = true;
+        }
         // If there's an error, display [ErrorState] on the whole screen until user responds
         debug!("App | Checking if there is an error in [ErrorState]");
         if self.error_state.error {

src/utils/errors.rs

@@ -1,5 +1,11 @@
 use std::sync::{Arc, Mutex};
 
+#[cfg(target_os = "windows")]
+use sysinfo::System;
+
+#[cfg(target_os = "windows")]
+use crate::helper::ProcessName;
+
 use super::sudo::SudoState;
 
 //---------------------------------------------------------------------------------------------------- [ErrorState] struct
@@ -91,3 +97,19 @@ impl ErrorState {
         SudoState::reset(state)
     }
 }
+
+#[cfg(target_os = "windows")]
+pub fn process_running(process_name: ProcessName) -> bool {
+    let name = match process_name {
+        ProcessName::P2pool => "p2pool",
+        ProcessName::Xmrig => "xmrig",
+        ProcessName::XmrigProxy => "xmrig-proxy",
+        ProcessName::Node => "monerod",
+        ProcessName::Xvb => panic!("XvB does not exist as a process outside of Gupaxx"),
+    };
+    let s = System::new_all();
+    if s.processes_by_name(name.as_ref()).next().is_some() {
+        return true;
+    }
+    false
+}