using Arc<Mutex<Vec<Human>>>

src/population.rs

@@ -1,4 +1,8 @@
+use std::sync::Arc;
+use std::sync::Mutex;
 use crate::prelude::*;
+use std::thread;
+
 
 #[derive(Debug)]
 pub struct Point {
@@ -10,7 +14,7 @@ pub struct Population {
     pub start_infected_ratio: i32,
     pub start_immune_ratio: i32,
     pub start_dead_ratio: i32,
-    pub humans: Vec<Human>,
+    pub humans: Arc<Mutex<Vec<Human>>>,
     pub width: i32,
     pub height: i32,
     pub age: i32,
@@ -35,14 +39,15 @@ impl Population {
 
         let size: usize = (width * height) as usize;
 
-        let mut the_humans: Vec<Human> = vec![
+        let the_humans_arc = Arc::new(Mutex::new(vec![
             Human {
                 x: 0,
                 y: 0,
                 present_state: State::Normal
             };
             size
-        ];
+        ]));
+        let the_humans = Arc::clone(&the_humans_arc);
         for x in 0..width {
             for y in 0..height {
                 let idx = human_idx(x, y, width);
@@ -60,7 +65,7 @@ impl Population {
                 {
                     present_state = State::Dead;
                 }
-                the_humans[idx] = Human{x: x, y: y, present_state: present_state};
+                the_humans.lock().unwrap()[idx] = Human{x: x, y: y, present_state: present_state};
             }
         }
         Self {
@@ -71,7 +76,7 @@ impl Population {
             height: height,
             plague: plague,
             age: 0,
-            humans: the_humans,
+            humans: the_humans_arc,
             size: size,
         }
     }
@@ -88,9 +93,11 @@ impl Population {
     }
 
     fn is_inside_and_infected(&self, point: Point) -> bool {
+        let the_humans_arc = Arc::clone(&self.humans);
         if self.is_inside(&point) {
             let idx = human_idx(point.x, point.y, self.width);
-            if self.humans[idx].present_state == State::Infected {
+            let humans = the_humans_arc.lock().unwrap();
+            if humans[idx].present_state == State::Infected {
                 roll(self.plague.infection_rate)
             } else {
                 false
@@ -114,7 +121,8 @@ impl Population {
         let mut stats: [i32; 4] = [0, 0, 0, 0];
         // stats[0] Normal stats[1] Infected stats[2] Immune stats[3] Dead
 
-        for h in self.humans.iter() {
+        let humans = Arc::clone(&self.humans);
+        for h in humans.lock().unwrap().iter() {
             match h.present_state {
                 State::Normal => {
                     possible_infected.push(Point{ x: h.x, y: h.y});
@@ -202,36 +210,60 @@ impl Population {
             }
         }
 
-        for infected_position in people_to_infect.iter() {
-            // println!("To infect: {:?}", infected_position);
-            //people_to_infect.iter().map(|infected_position|{
-            let infected_index = human_idx(infected_position.x, infected_position.y, self.width);
-            // let _ = infected_position.x;
-            //DEBUG
-            //println!("x: {} y: {} index: {}",infected_position.x,infected_position.y,infected_index);
-            self.humans[infected_index].present_state = State::Infected;
-            //DEBUG
-            //println!("Infected someone");
+//        for infected_position in people_to_infect.iter() {
+//            // println!("To infect: {:?}", infected_position);
+//            //people_to_infect.iter().map(|infected_position|{
+//            let infected_index = human_idx(infected_position.x, infected_position.y, self.width);
+//            // let _ = infected_position.x;
+//            //DEBUG
+//            //println!("x: {} y: {} index: {}",infected_position.x,infected_position.y,infected_index);
+//            self.humans[infected_index].present_state = State::Infected;
+//            //DEBUG
+//            //println!("Infected someone");
+//        }
+
+        let mut threads = vec![];
+        {
+            let humans = Arc::clone(&self.humans);
+            let width = self.width;
+            threads.push(thread::spawn(move || {
+                for infected_position in people_to_infect.iter() {
+                    let infected_index = human_idx(infected_position.x, infected_position.y, width);
+                    humans.lock().unwrap()[infected_index].present_state = State::Infected;
+                }
+            }));
         }
 
-        for cured_position in people_to_cure.iter() {
-            //people_to_cure.iter().map(|cured_position|{
-            let cured_index = human_idx(cured_position.x, cured_position.y, self.width);
-            if self.humans[cured_index].present_state != State::Infected {
-                println!("not infected");
-            }
-            self.humans[cured_index].present_state = State::Immune;
-            //DEBUG
-            //println!("Cured someone");
+        {
+            let humans = Arc::clone(&self.humans);
+            let width = self.width;
+            threads.push(thread::spawn(move || {
+                for cured_position in people_to_cure.iter() {
+                    //people_to_cure.iter().map(|cured_position|{
+                    let cured_index = human_idx(cured_position.x, cured_position.y, width);
+                    if humans.lock().unwrap()[cured_index].present_state != State::Infected {
+                        println!("not infected");
+                    } else {
+                        humans.lock().unwrap()[cured_index].present_state = State::Immune;
+                    }
+                    //DEBUG
+                    //println!("Cured someone");
+                }
+            }));
+        }
+
+        for t in threads {
+            t.join().unwrap();
         }
 
         for dead_position in people_to_kill.iter() {
+            let humans = Arc::clone(&self.humans);
             //people_to_kill.iter().map(|dead_position|{
             let dead_index = human_idx(dead_position.x, dead_position.y, self.width);
-            if self.humans[dead_index].present_state == State::Dead {
+            if humans.lock().unwrap()[dead_index].present_state == State::Dead {
                 // println!("Already dead");
             } else {
-                self.humans[dead_index].present_state = State::Dead;
+                humans.lock().unwrap()[dead_index].present_state = State::Dead;
             }
             //DEBUG
         }
@@ -364,13 +396,14 @@ mod tests {
         let disease = Disease::new(20, 10, 5, String::from("Covid 44"));
         let (width, height) = (5, 7);
         let population = Population::new(20, 10, 5, 5, 7, disease);
-        assert_eq!(population.humans.len(), 5 * 7);
-        for h in population.humans.iter() {
+        let humans = Arc::clone(&population.humans);
+        assert_eq!(humans.lock().unwrap().len(), 5 * 7);
+        for h in humans.lock().unwrap().iter() {
             let idx = human_idx(h.x, h.y, width);
-            assert_eq!(population.humans[idx].x, h.x, "coordinates should match");
-            assert_eq!(population.humans[idx].y, h.y, "coordinates should match");
+            assert_eq!(humans.lock().unwrap()[idx].x, h.x, "coordinates should match");
+            assert_eq!(humans.lock().unwrap()[idx].y, h.y, "coordinates should match");
         }
-        assert_eq!(population.humans.len(), (width * height) as usize);
+        assert_eq!(humans.lock().unwrap().len(), (width * height) as usize);
     }
 
     #[test]