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-rw-r--r--Year_3/TSDWL/ex_20191218/MainThread.java9
-rw-r--r--Year_3/TSDWL/ex_20191218/Shared.java10
-rw-r--r--Year_3/TSDWL/ex_20191218/Thread1.java42
-rw-r--r--Year_3/TSDWL/ex_20191218/Thread2.java28
4 files changed, 89 insertions, 0 deletions
diff --git a/Year_3/TSDWL/ex_20191218/MainThread.java b/Year_3/TSDWL/ex_20191218/MainThread.java
new file mode 100644
index 0000000..c340a2a
--- /dev/null
+++ b/Year_3/TSDWL/ex_20191218/MainThread.java
@@ -0,0 +1,9 @@
+public class MainThread {
+ public static void main(String[] args) {
+ Shared sh = new Shared();
+ Thread1 t1 = new Thread1(sh);
+ Thread2 t2 = new Thread2(sh);
+ t1.start();
+ t2.start();
+ }
+}
diff --git a/Year_3/TSDWL/ex_20191218/Shared.java b/Year_3/TSDWL/ex_20191218/Shared.java
new file mode 100644
index 0000000..105fbf8
--- /dev/null
+++ b/Year_3/TSDWL/ex_20191218/Shared.java
@@ -0,0 +1,10 @@
+public class Shared {
+ private int x;
+
+ public Shared() {
+ x = (int) (Math.random() * (10-0+1)+0);
+ }
+
+ synchronized void set(int val) { x = val; }
+ synchronized int get() { return x; }
+}
diff --git a/Year_3/TSDWL/ex_20191218/Thread1.java b/Year_3/TSDWL/ex_20191218/Thread1.java
new file mode 100644
index 0000000..55edaba
--- /dev/null
+++ b/Year_3/TSDWL/ex_20191218/Thread1.java
@@ -0,0 +1,42 @@
+public class Thread1 extends Thread {
+ Shared mem;
+ public Thread1(Shared mem) {
+ super();
+ this.mem = mem;
+ }
+
+ public void run() {
+ int m;
+
+ while (true) {
+ try {
+ Thread.sleep(100);
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ break;
+ }
+ m = (int) (Math.random() * (10-0+1)+0);
+
+ synchronized(mem) {
+ System.out.printf("Thread 1, x = %d, m = %d\n", mem.get(), m);
+ if (mem.get() == -1) {
+ break;
+ } else if(mem.get() == m) {
+ System.out.println("RISPOSTA CORRETTA");
+ mem.set(-1);
+ } else if(Math.abs(m-mem.get()) > 5) {
+ try {
+ System.out.println("risposta MOLTO sbagliata");
+ System.out.println("Thread 1 going to sleep");
+ mem.wait();
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ break;
+ }
+ } else {
+ System.out.println("risposta sbagliata");
+ }
+ }
+ }
+ }
+}
diff --git a/Year_3/TSDWL/ex_20191218/Thread2.java b/Year_3/TSDWL/ex_20191218/Thread2.java
new file mode 100644
index 0000000..35cb3fe
--- /dev/null
+++ b/Year_3/TSDWL/ex_20191218/Thread2.java
@@ -0,0 +1,28 @@
+public class Thread2 extends Thread {
+ Shared mem;
+ public Thread2(Shared mem) {
+ super();
+ this.mem = mem;
+ }
+
+ public void run() {
+ int m;
+
+ while (true) {
+ try {
+ Thread.sleep(300);
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ break;
+ }
+ synchronized(mem) {
+ if (mem.get() == -1) {
+ break;
+ }
+
+ System.out.println("\t\t\tThread 2, notify thread 1");
+ mem.notify();
+ }
+ }
+ }
+}