ACE/ace/Monitor_Control/Windows_Monitor.cpp

   1 #include "ace/Monitor_Control/Windows_Monitor.h"
   2
   3 #if defined (ACE_HAS_WIN32_PDH)
   4
   5 #include "ace/Log_Category.h"
   6
   7 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
   8
   9 namespace ACE
  10 {
  11   namespace Monitor_Control
  12   {
  13     Windows_Monitor::Windows_Monitor (const ACE_TCHAR *path)
  14       : value_ (0.0)
  15       , path_ (path)
  16       , query_ (0)
  17       , counter_ (0)
  18       , status_ (ERROR_SUCCESS)
  19     {
  20       this->init ();
  21     }
  22
  23     void
  24     Windows_Monitor::update_i ()
  25     {
  26       PdhCollectQueryData (this->query_);
  27       PDH_FMT_COUNTERVALUE pdh_value;
  28
  29       PdhGetFormattedCounterValue (this->counter_,
  30                                    PDH_FMT_DOUBLE,
  31                                    0,
  32                                    &pdh_value);
  33
  34       this->value_ = pdh_value.doubleValue;
  35     }
  36
  37     void
  38     Windows_Monitor::clear_impl ()
  39     {
  40       this->init ();
  41     }
  42
  43     void
  44     Windows_Monitor::init ()
  45     {
  46       /// Create a query and a counter here so it doesn't have
  47       /// to be done with each update.
  48
  49       this->status_ = ACE_TEXT_PdhOpenQuery (0, 0, &this->query_);
  50
  51       if (ERROR_SUCCESS != this->status_)
  52         {
  53           ACELIB_ERROR ((LM_DEBUG, ACE_TEXT ("PdhOpenQuery failed\n")));
  54         }
  55
  56       this->status_ =
  57         ACE_TEXT_PdhAddCounter (this->query_,
  58                                 this->path_.c_str (),
  59                                 0,
  60                                 &this->counter_);
  61
  62       if (ERROR_SUCCESS != this->status_)
  63         {
  64           ACELIB_ERROR ((LM_DEBUG,
  65                       ACE_TEXT ("PdhAddCounter %s failed\n"),
  66                       this->path_.c_str ()));
  67         }
  68     }
  69   }
  70 }
  71
  72 ACE_END_VERSIONED_NAMESPACE_DECL
  73
  74 #endif /* defined (ACE_HAS_WIN32_PDH) */