Prepare ntcore for merge into allwpilib.

ntcore/src/main/native/cpp/IEntryNotifier.h

@@ -0,0 +1,45 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2017-2018. 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 NTCORE_IENTRYNOTIFIER_H_
+#define NTCORE_IENTRYNOTIFIER_H_
+
+#include <climits>
+#include <memory>
+
+#include "ntcore_cpp.h"
+
+namespace nt {
+
+class IEntryNotifier {
+ public:
+  IEntryNotifier() = default;
+  IEntryNotifier(const IEntryNotifier&) = delete;
+  IEntryNotifier& operator=(const IEntryNotifier&) = delete;
+  virtual ~IEntryNotifier() = default;
+  virtual bool local_notifiers() const = 0;
+
+  virtual unsigned int Add(
+      std::function<void(const EntryNotification& event)> callback,
+      llvm::StringRef prefix, unsigned int flags) = 0;
+  virtual unsigned int Add(
+      std::function<void(const EntryNotification& event)> callback,
+      unsigned int local_id, unsigned int flags) = 0;
+  virtual unsigned int AddPolled(unsigned int poller_uid,
+                                 llvm::StringRef prefix,
+                                 unsigned int flags) = 0;
+  virtual unsigned int AddPolled(unsigned int poller_uid, unsigned int local_id,
+                                 unsigned int flags) = 0;
+
+  virtual void NotifyEntry(unsigned int local_id, StringRef name,
+                           std::shared_ptr<Value> value, unsigned int flags,
+                           unsigned int only_listener = UINT_MAX) = 0;
+};
+
+}  // namespace nt
+
+#endif  // NTCORE_IENTRYNOTIFIER_H_