From 408aaf687b75176825ad901ef0b42f72db55063a Mon Sep 17 00:00:00 2001
From: Pedro Henrique Penna <pedrohenriquepenna@gmail.com>
Date: Sun, 11 Aug 2024 08:46:20 -0700
Subject: [PATCH] [ev] E: Fail Support for Event Manager Init

---
 src/event/manager.rs | 4 +++-
 src/event/mod.rs     | 5 +++--
 src/kcall/handler.rs | 4 +++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/event/manager.rs b/src/event/manager.rs
index 269d1d2e..e0bb5353 100644
--- a/src/event/manager.rs
+++ b/src/event/manager.rs
@@ -732,7 +732,7 @@ fn exception_handler(info: &ExceptionInformation, _ctx: &ContextInformation) {
     }
 }
 
-pub fn init(hal: &mut Hal) {
+pub fn init(hal: &mut Hal) -> Result<(), Error> {
     let mut pending_interrupts: [LinkedList<EventDescriptor>; usize::BITS as usize] =
         unsafe { mem::zeroed() };
     for list in pending_interrupts.iter_mut() {
@@ -804,4 +804,6 @@ pub fn init(hal: &mut Hal) {
             Err(e) => warn!("failed to register interrupt handler: {:?}", e),
         }
     }
+
+    Ok(())
 }
diff --git a/src/event/mod.rs b/src/event/mod.rs
index 8e7f7fbb..ae6f3019 100644
--- a/src/event/mod.rs
+++ b/src/event/mod.rs
@@ -18,6 +18,7 @@ use crate::hal::Hal;
 // Exports
 //==================================================================================================
 
+use ::error::Error;
 pub use kcall::*;
 pub use manager::{
     EventManager,
@@ -28,6 +29,6 @@ pub use manager::{
 // Standalone Functions
 //==================================================================================================
 
-pub fn init(hal: &mut Hal) {
-    manager::init(hal);
+pub fn init(hal: &mut Hal) -> Result<(), Error> {
+    manager::init(hal)
 }
diff --git a/src/kcall/handler.rs b/src/kcall/handler.rs
index 118929b3..b0237f5e 100644
--- a/src/kcall/handler.rs
+++ b/src/kcall/handler.rs
@@ -37,7 +37,9 @@ use ::sys::{
 /// Kernel call handler.
 ///
 pub fn kcall_handler(mut hal: Hal, mut mm: VirtMemoryManager, mut pm: ProcessManager) {
-    event::init(&mut hal);
+    if let Err(e) = event::init(&mut hal) {
+        panic!("failed to initialize event manager: {:?}", e);
+    }
 
     loop {
         // Read kernel call arguments from the scoreboard.