From 8fdff36c653c3b4e5add8bf4d19d3489c3ef17e5 Mon Sep 17 00:00:00 2001
From: Anton Lydike <me@antonlydike.de>
Date: Sat, 11 Sep 2021 09:54:58 +0200
Subject: [PATCH] changed EABORT to ETIMEOUT for marking timeouts

---
 kinclude/ktypes.h | 8 +++++---
 kinclude/sched.c  | 2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/kinclude/ktypes.h b/kinclude/ktypes.h
index 642ccc5..f67edc8 100644
--- a/kinclude/ktypes.h
+++ b/kinclude/ktypes.h
@@ -13,7 +13,7 @@ enum error_code {
     ENOMEM  = 3,    // not enough memory
     ENOBUFS = 4,    // no space left in buffer
     ESRCH   = 5,    // no such process
-    EABORT  = 6
+    ETIMEOUT= 6     // timeout while waiting
 };
 
 /*
@@ -33,16 +33,18 @@ struct loaded_binary;
 
 struct process_control_block {
     int pid;
+    // state information
     int pc;
     int regs[31];
     int exit_code;
     // scheduling information
     enum process_status status;
     struct process_control_block* waiting_for_process;
-    struct loaded_binary* binary;
     unsigned long long int asleep_until;
-    // parent
+    // hierarchical information
+    struct loaded_binary* binary;
     struct process_control_block* parent;
+    // memory management information
     void* stack_top;
 };
 
diff --git a/kinclude/sched.c b/kinclude/sched.c
index ac0ee12..89cb29a 100644
--- a/kinclude/sched.c
+++ b/kinclude/sched.c
@@ -103,7 +103,7 @@ struct process_control_block* scheduler_select_free()
                 if (pcb->asleep_until != 0) {
                     if (pcb->asleep_until < mtime) {
                         // if the timeout ran out, set an error code
-                        pcb->regs[REG_A0 + 1] = EABORT;
+                        pcb->regs[REG_A0 + 1] = ETIMEOUT;
                         pcb->status = PROC_RDY;
                         return pcb;
                     }