From 6bd5da92c5119fb5daf2ad1b384cb424d92efaf5 Mon Sep 17 00:00:00 2001
From: JJ Roberts-White <computerfido@gmail.com>
Date: Fri, 22 Oct 2021 16:45:09 +1100
Subject: [PATCH] Kernel: SIGALARM

---
 Kernel/include/Objects/Process.h | 22 ++++++++++++++++++++++
 Kernel/include/TimerEvent.h      |  2 +-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/Kernel/include/Objects/Process.h b/Kernel/include/Objects/Process.h
index c8a55aff..f3da069e 100644
--- a/Kernel/include/Objects/Process.h
+++ b/Kernel/include/Objects/Process.h
@@ -15,6 +15,7 @@
 #include <RefPtr.h>
 #include <System.h>
 #include <Thread.h>
+#include <TimerEvent.h>
 #include <Vector.h>
 
 class Process : public KernelObject {
@@ -352,6 +353,24 @@ class Process : public KernelObject {
         goto retry; // Keep waiting
     }
 
+    ALWAYS_INLINE void SetAlarm(unsigned int seconds) {
+        ScopedSpinLock lockProcess(m_processLock);
+
+        if (seconds == 0) {
+            m_alarmEvent = nullptr;
+            return;
+        }
+
+        m_alarmEvent = new Timer::TimerEvent(
+            seconds * 1000000,
+            [](void* thread) {
+                Thread* t = reinterpret_cast<Thread*>(thread);
+
+                t->Signal(SIGALRM);
+            },
+            m_mainThread.get());
+    }
+
     char name[NAME_MAX + 1];
     char workingDir[PATH_MAX + 1];
 
@@ -426,5 +445,8 @@ class Process : public KernelObject {
     // Watcher objects watching the process
     List<KernelObjectWatcher*> m_watching;
 
+    // Used for SIGALARM
+    FancyRefPtr<Timer::TimerEvent> m_alarmEvent = nullptr;
+
     Process* m_parent = nullptr;
 };
diff --git a/Kernel/include/TimerEvent.h b/Kernel/include/TimerEvent.h
index 137b3243..7b01b62d 100644
--- a/Kernel/include/TimerEvent.h
+++ b/Kernel/include/TimerEvent.h
@@ -34,4 +34,4 @@ namespace Timer{
         __attribute__((always_inline)) inline void Lock() { acquireLock(&lock); }
         __attribute__((always_inline)) inline void Unlock() { releaseLock(&lock); }
     };
-}
\ No newline at end of file
+}