From 7a1aa21e1e041c1d6dd2e0b5f606de0590a0824c Mon Sep 17 00:00:00 2001
From: EDiasAlberto <proxamon1@gmail.com>
Date: Wed, 16 Oct 2024 18:34:56 +0100
Subject: [PATCH] implement logic to increment recent_cpu on every
 timer_interrupt () call

---
 src/devices/timer.c  |  1 +
 src/threads/thread.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/devices/timer.c b/src/devices/timer.c
index 4bb602e..63e15f6 100644
--- a/src/devices/timer.c
+++ b/src/devices/timer.c
@@ -208,6 +208,7 @@ timer_interrupt (struct intr_frame *args UNUSED)
       else
         break;
     }
+  thread_increment_recent_cpu ();
   thread_tick ();
 }
 
diff --git a/src/threads/thread.c b/src/threads/thread.c
index 86cd872..47cd5c4 100644
--- a/src/threads/thread.c
+++ b/src/threads/thread.c
@@ -382,6 +382,19 @@ calculate_recent_cpu (void)
   return { 0 };
 }
 
+void
+thread_increment_recent_cpu (void)
+{
+  struct thread *t = thread_current ();
+  if (t == idle_thread)
+  {
+    return;
+  }
+  fp32_t old_recent_cpu = t->recent_cpu;
+  old_recent_cpu.raw = old_recent_cpu.raw + 1;
+  t->recent_cpu = old_recent_cpu;
+}
+
 /* Sets the current thread's nice value to NICE. */
 void
 thread_set_nice (int nice)