Prepare cscore for merge into allwpilib.

cscore/src/main/native/cpp/Telemetry.h

@@ -0,0 +1,52 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2015-2018 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef CSCORE_TELEMETRY_H_
+#define CSCORE_TELEMETRY_H_
+
+#include <support/SafeThread.h>
+
+#include "cscore_cpp.h"
+
+namespace cs {
+
+class SourceImpl;
+
+class Telemetry {
+  friend class TelemetryTest;
+
+ public:
+  static Telemetry& GetInstance() {
+    static Telemetry instance;
+    return instance;
+  }
+  ~Telemetry();
+
+  void Start();
+  void Stop();
+
+  // User interface
+  void SetPeriod(double seconds);
+  double GetElapsedTime();
+  int64_t GetValue(CS_Handle handle, CS_TelemetryKind kind, CS_Status* status);
+  double GetAverageValue(CS_Handle handle, CS_TelemetryKind kind,
+                         CS_Status* status);
+
+  // Telemetry events
+  void RecordSourceBytes(const SourceImpl& source, int quantity);
+  void RecordSourceFrames(const SourceImpl& source, int quantity);
+
+ private:
+  Telemetry();
+
+  class Thread;
+  wpi::SafeThreadOwner<Thread> m_owner;
+};
+
+}  // namespace cs
+
+#endif  // CSCORE_TELEMETRY_H_