kernel: add KHardwareTimer

1 files changed, 40 insertions, 0 deletions

diff --git a/src/core/hle/kernel/k_timer_task.h b/src/core/hle/kernel/k_timer_task.h
new file mode 100644
index 0000000000..66f0a5a908
--- /dev/null
+++ b/src/core/hle/kernel/k_timer_task.h
@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/intrusive_red_black_tree.h"
+
+namespace Kernel {
+
+class KTimerTask : public Common::IntrusiveRedBlackTreeBaseNode<KTimerTask> {
+public:
+    static constexpr int Compare(const KTimerTask& lhs, const KTimerTask& rhs) {
+        if (lhs.GetTime() < rhs.GetTime()) {
+            return -1;
+        } else {
+            return 1;
+        }
+    }
+
+    constexpr explicit KTimerTask() = default;
+
+    constexpr void SetTime(s64 t) {
+        m_time = t;
+    }
+
+    constexpr s64 GetTime() const {
+        return m_time;
+    }
+
+    // NOTE: This is virtual in Nintendo's kernel. Prior to 13.0.0, KWaitObject was also a
+    // TimerTask; this is no longer the case. Since this is now KThread exclusive, we have
+    // devirtualized (see inline declaration for this inside k_thread.h).
+    void OnTimer();
+
+private:
+    // Absolute time in nanoseconds
+    s64 m_time{};
+};
+
+} // namespace Kernel