ACE/ace/Monitor_Control/Windows_Monitor.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  * @file Windows_Monitor.h
   6  *
   7  * @author Jeff Parsons <j.parsons@vanderbilt.edu>
   8  */
   9 //=============================================================================
  10
  11 #ifndef WINDOWS_MONITOR_H
  12 #define WINDOWS_MONITOR_H
  13
  14 #include /**/ "ace/pre.h"
  15
  16 #include "ace/SString.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 #pragma once
  20 #endif /* ACE_LACKS_PRAGMA_ONCE */
  21
  22 #include "ace/os_include/os_pdh.h"
  23
  24 #include "ace/Monitor_Control/Monitor_Control_export.h"
  25
  26 #if defined (ACE_HAS_WIN32_PDH)
  27
  28 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  29
  30 namespace ACE
  31 {
  32   namespace Monitor_Control
  33   {
  34     /**
  35      * @class Windows_Monitor
  36      *
  37      * @brief Mixin class for concrete monitors compiled on Windows machines.
  38      */
  39     class MONITOR_CONTROL_Export Windows_Monitor
  40     {
  41       friend class Windows_Multi_Instance_Monitor;
  42
  43     protected:
  44       Windows_Monitor (const ACE_TCHAR *path);
  45
  46       /// Platform-specific implementation.
  47       void update_i ();
  48
  49       /// Platform-specific reset.
  50       void clear_impl ();
  51
  52     protected:
  53       double value_;
  54
  55     private:
  56       /// Code common to constructor and clear_impl().
  57       void init ();
  58
  59     /// Make these persistent as members so they don't have to be
  60     /// created & destroyed with each update.
  61     private:
  62       ACE_TString path_;
  63       HQUERY query_;
  64       HCOUNTER counter_;
  65       PDH_STATUS status_;
  66     };
  67   }
  68 }
  69
  70 ACE_END_VERSIONED_NAMESPACE_DECL
  71
  72 #include /**/ "ace/post.h"
  73
  74 #endif /* defined (ACE_HAS_WIN32_PDH) */
  75
  76 #endif // WINDOWS_MONITOR_H