Merge pull request #143 from zer0condition/scheduler-improvements

[KernelKit] scheduler sleep tracking + mutex priority inheritance

2 files changed, 6 insertions, 2 deletions

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
 
diff --git a/src/kernel/KernelKit/UserProcessScheduler.h b/src/kernel/KernelKit/UserProcessScheduler.h
index 5018f1f6..8c7a4afa 100644
--- a/src/kernel/KernelKit/UserProcessScheduler.h
+++ b/src/kernel/KernelKit/UserProcessScheduler.h
@@ -83,9 +83,10 @@ class UserProcess final {
     kExecutableKindCount,
   };
 
-  ProcessTime PTime{0};  //! @brief Process allocated tine.
+  ProcessTime PTime{0};  //! @brief Process allocated time.
   ProcessTime RTime{0};  //! @brief Process run time.
-  ProcessTime UTime{0};  //! #brief Process used time.
+  ProcessTime UTime{0};  //! @brief Process used time.
+  ProcessTime STime{0};  //! @brief Process sleep time (for dynamic priority boost).
 
   ProcessID      ProcessId{kCPSInvalidPID};
   ExecutableKind Kind{ExecutableKind::kExecutableKind};