Squashed 'third_party/allwpilib_2016/' content from commit 7f61816

Change-Id: If9d9245880859cdf580f5d7f77045135d0521ce7
git-subtree-dir: third_party/allwpilib_2016
git-subtree-split: 7f618166ed253a24629934fcf89c3decb0528a3b
diff --git a/wpilibc/shared/include/Commands/Subsystem.h b/wpilibc/shared/include/Commands/Subsystem.h
new file mode 100644
index 0000000..8762ec8
--- /dev/null
+++ b/wpilibc/shared/include/Commands/Subsystem.h
@@ -0,0 +1,50 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2011. 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 $(WIND_BASE)/WPILib.  */
+/*----------------------------------------------------------------------------*/
+
+#ifndef __SUBSYSTEM_H__
+#define __SUBSYSTEM_H__
+
+#include "ErrorBase.h"
+#include "SmartDashboard/NamedSendable.h"
+#include <string>
+#include <memory>
+
+class Command;
+
+class Subsystem : public ErrorBase, public NamedSendable {
+  friend class Scheduler;
+
+ public:
+  Subsystem(const std::string &name);
+  virtual ~Subsystem() = default;
+
+  void SetDefaultCommand(Command *command);
+  Command *GetDefaultCommand();
+  void SetCurrentCommand(Command *command);
+  Command *GetCurrentCommand() const;
+  virtual void InitDefaultCommand();
+
+ private:
+  void ConfirmCommand();
+
+  Command *m_currentCommand = nullptr;
+  bool m_currentCommandChanged = true;
+  Command *m_defaultCommand = nullptr;
+  std::string m_name;
+  bool m_initializedDefaultCommand = false;
+
+ public:
+  virtual std::string GetName() const;
+  virtual void InitTable(std::shared_ptr<ITable> table);
+  virtual std::shared_ptr<ITable> GetTable() const;
+  virtual std::string GetSmartDashboardType() const;
+
+ protected:
+  std::shared_ptr<ITable> m_table;
+};
+
+#endif