1 files changed, 75 insertions, 0 deletions
diff --git a/src/kernel/KernelKit/Timer.h b/src/kernel/KernelKit/Timer.h
new file mode 100644
index 00000000..46db5671
--- /dev/null
+++ b/src/kernel/KernelKit/Timer.h
@@ -0,0 +1,75 @@
+/* ========================================
+
+  Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
+
+======================================== */
+
+#pragma once
+
+#include <ArchKit/ArchKit.h>
+#include <KernelKit/KPC.h>
+
+namespace Kernel {
+class SoftwareTimer;
+class TimerInterface;
+
+inline constexpr Int16 kTimeUnit = 1000;
+
+class TimerInterface {
+ public:
+  /// @brief Default constructor
+  explicit TimerInterface() = default;
+  virtual ~TimerInterface() = default;
+
+ public:
+  NE_COPY_DEFAULT(TimerInterface)
+
+ public:
+  virtual BOOL Wait() noexcept;
+};
+
+class SoftwareTimer final : public TimerInterface {
+ public:
+  explicit SoftwareTimer(Int64 seconds);
+  ~SoftwareTimer() override;
+
+ public:
+  NE_COPY_DEFAULT(SoftwareTimer)
+
+ public:
+  BOOL Wait() noexcept override;
+
+ private:
+  UIntPtr* fDigitalTimer{nullptr};
+  Int64    fWaitFor{0};
+};
+
+class HardwareTimer final : public TimerInterface {
+ public:
+  explicit HardwareTimer(UInt64 seconds);
+  ~HardwareTimer() override;
+
+ public:
+  NE_COPY_DEFAULT(HardwareTimer)
+
+ public:
+  BOOL Wait() noexcept override;
+
+ private:
+  volatile UInt8* fDigitalTimer{nullptr};
+  Int64           fWaitFor{0};
+};
+
+inline UInt64 rtl_microseconds(UInt64 time) {
+  if (time < 1) return 0;
+
+  // TODO: nanoseconds maybe?
+  return time / kTimeUnit;
+}
+
+inline UInt64 rtl_milliseconds(UInt64 time) {
+  if (time < 1) return 0;
+
+  return time;
+}
+}  // namespace Kernel