1 /*

     2  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP

    26 #define SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP

    27 

    28 #include "jfr/utilities/jfrAllocation.hpp"

    29 #include "utilities/globalDefinitions.hpp"

    30 

    31 class CPUInformation;

    32 class EnvironmentVariable;

    33 class SystemProcess;

    34 

    35 class JfrOSInterface: public JfrCHeapObj {

    36   friend class JfrRecorder;

    37  private:

    38   class JfrOSInterfaceImpl;

    39   JfrOSInterfaceImpl* _impl;

    40 

    41   JfrOSInterface();

    42   ~JfrOSInterface();

    43   bool initialize();

    44   static JfrOSInterface& instance();

    45   static JfrOSInterface* create();

    46   static void destroy();

    47 

    48  public:

    49   static int cpu_information(CPUInformation& cpu_info);

    50   static int cpu_load(int which_logical_cpu, double* cpu_load);

    51   static int context_switch_rate(double* rate);

    52   static int cpu_load_total_process(double* cpu_load);

    53   static int cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad);

    54   static int os_version(char** os_version);

    55   static int generate_initial_environment_variable_events();

    56   static int system_processes(SystemProcess** system_processes, int* no_of_sys_processes);

    57 };

    58 

    59 #endif // SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP