1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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).
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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 
30 class CPUInformation;
31 class EnvironmentVariable;
32 class NetworkInterface;
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 const char* virtualization_name();
56   static int generate_initial_environment_variable_events();
57   static int system_processes(SystemProcess** system_processes, int* no_of_sys_processes);
58   static int network_utilization(NetworkInterface** network_interfaces);
59 };
60 
61 #endif // SHARE_VM_JFR_PERIODIC_JFROSINTERFACE_HPP
62