From aa548ba47347a67ff64a38dc842f9d0d5d6bf364 Mon Sep 17 00:00:00 2001
From: zer0condition <apoyhome6@gmail.com>
Date: Sun, 22 Mar 2026 19:56:35 +0530
Subject: [KernelKit] scheduler sleep tracking + mutex priority inheritance

- add STime field to UserProcess for tracking sleep/blocked time
- boost PTime proportionally when process wakes from sleep (interactive boost)
- implement priority inheritance in BinaryMutex to prevent priority inversion
- fix broken Unlock() that was spinning waiting for process status change
- fix LockAndWait() that was locking then immediately unlocking

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 src/kernel/KernelKit/BinaryMutex.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/kernel/KernelKit/BinaryMutex.h')

diff --git a/src/kernel/KernelKit/BinaryMutex.h b/src/kernel/KernelKit/BinaryMutex.h
index 2fb390d3..d97ab854 100644
--- a/src/kernel/KernelKit/BinaryMutex.h
+++ b/src/kernel/KernelKit/BinaryMutex.h
@@ -8,12 +8,14 @@
 
 #include <CompilerKit/CompilerKit.h>
 #include <KernelKit/Timer.h>
+#include <KernelKit/CoreProcessScheduler.h>
 #include <NeKit/Config.h>
 
 namespace Kernel {
 class UserProcess;
 
 /// @brief Access control class, which locks a task until one is done.
+/// Implements priority inheritance to prevent priority inversion.
 class BinaryMutex final {
  public:
   using LockedPtr = UserProcess*;
@@ -37,6 +39,7 @@ class BinaryMutex final {
 
  private:
   LockedPtr fLockingProcess{nullptr};
+  AffinityKind fOwnerOriginalAffinity{AffinityKind::kInvalid};  // for priority inheritance
 };
 }  // namespace Kernel
 
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