Timers. Probably.

src/xenia/kernel/objects/sources.gypi

@@ -15,5 +15,7 @@
     'xsemaphore.h',
     'xthread.cc',
     'xthread.h',
+    'xtimer.cc',
+    'xtimer.h',
   ],
 }

src/xenia/kernel/objects/xtimer.cc

@@ -0,0 +1,60 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <xenia/kernel/objects/xtimer.h>
+
+
+using namespace xe;
+using namespace xe::kernel;
+
+
+XTimer::XTimer(KernelState* kernel_state) :
+    XObject(kernel_state, kTypeTimer),
+    handle_(NULL) {
+}
+
+XTimer::~XTimer() {
+  if (handle_) {
+    CloseHandle(handle_);
+  }
+}
+
+void XTimer::Initialize(uint32_t timer_type) {
+  XEASSERTNULL(handle_);
+
+  bool manual_reset = false;
+  switch (timer_type) {
+  case 0: // NotificationTimer
+    manual_reset = true;
+    break;
+  case 1: // SynchronizationTimer
+    manual_reset = false;
+    break;
+  default:
+    XEASSERTALWAYS();
+    break;
+  }
+
+  handle_ = CreateWaitableTimer(NULL, manual_reset, NULL);
+}
+
+X_STATUS XTimer::SetTimer(int64_t due_time, uint32_t period_ms) {
+  LARGE_INTEGER due_time_li;
+  due_time_li.QuadPart = due_time;
+  if (SetWaitableTimer(handle_, &due_time_li, period_ms, NULL, NULL, TRUE)) {
+    return X_STATUS_SUCCESS;
+  } else {
+    return X_STATUS_UNSUCCESSFUL;
+  }
+}
+
+X_STATUS XTimer::Cancel() {
+  return CancelWaitableTimer(handle_) == 0 ?
+      X_STATUS_SUCCESS : X_STATUS_UNSUCCESSFUL;
+}

src/xenia/kernel/objects/xtimer.h

@@ -0,0 +1,44 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_KERNEL_XBOXKRNL_XTIMER_H_
+#define XENIA_KERNEL_XBOXKRNL_XTIMER_H_
+
+#include <xenia/kernel/xobject.h>
+
+#include <xenia/xbox.h>
+
+
+namespace xe {
+namespace kernel {
+
+
+class XTimer : public XObject {
+public:
+  XTimer(KernelState* kernel_state);
+  virtual ~XTimer();
+
+  void Initialize(uint32_t timer_type);
+
+  // completion routine, arg to completion routine
+  X_STATUS SetTimer(int64_t due_time, uint32_t period_ms);
+  X_STATUS Cancel();
+
+  virtual void* GetWaitHandle() { return handle_; }
+
+private:
+  HANDLE handle_;
+};
+
+
+}  // namespace kernel
+}  // namespace xe
+
+
+#endif  // XENIA_KERNEL_XBOXKRNL_TIMER_H_