sysman: add diagnostics boilerplate code

Signed-off-by: Vilvaraj, T J Vivek <t.j.vivek.vilvaraj@intel.com>

level_zero/tools/source/sysman/diagnostics/diagnostics.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2020-2021 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#pragma once
+#include <level_zero/zes_api.h>
+
+#include <string>
+#include <vector>
+
+struct _zes_diag_handle_t {
+    virtual ~_zes_diag_handle_t() = default;
+};
+
+namespace L0 {
+
+struct OsSysman;
+
+class Diagnostics : _zes_diag_handle_t {
+  public:
+    virtual ~Diagnostics() {}
+    virtual ze_result_t diagnosticsGetProperties(zes_diag_properties_t *pProperties) = 0;
+    inline zes_diag_handle_t toHandle() { return this; }
+
+    static Diagnostics *fromHandle(zes_diag_handle_t handle) {
+        return static_cast<Diagnostics *>(handle);
+    }
+    bool isDiagnosticsEnabled = false;
+};
+
+struct DiagnosticsHandleContext {
+    DiagnosticsHandleContext(OsSysman *pOsSysman) : pOsSysman(pOsSysman){};
+    ~DiagnosticsHandleContext();
+
+    void init();
+
+    ze_result_t diagnosticsGet(uint32_t *pCount, zes_diag_handle_t *phDiagnostics);
+
+    OsSysman *pOsSysman = nullptr;
+    std::vector<Diagnostics *> handleList = {};
+
+  private:
+    void createHandle();
+};
+
+} // namespace L0