tests/benchmarks/log.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/benchmarks/log.cpp
   3 // Purpose:     Log-related benchmarks
   4 // Author:      Vadim Zeitlin
   5 // Created:     2012-01-21
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "bench.h"
  12
  13 #include "wx/log.h"
  14
  15 // This class is used to check that the arguments of log functions are not
  16 // evaluated.
  17 struct NotCreated
  18 {
  19     NotCreated() { wxAbort(); }
  20
  21     const char* AsStr() const { return "unreachable"; }
  22 };
  23
  24 // Temporarily change the log level to the given one.
  25 class LogLevelSetter
  26 {
  27 public:
  28     LogLevelSetter(wxLogLevel levelNew)
  29         : m_levelOld(wxLog::GetLogLevel())
  30     {
  31         wxLog::SetLogLevel(levelNew);
  32     }
  33
  34     ~LogLevelSetter()
  35     {
  36         wxLog::SetLogLevel(m_levelOld);
  37     }
  38
  39 private:
  40     const wxLogLevel m_levelOld;
  41
  42     wxDECLARE_NO_COPY_CLASS(LogLevelSetter);
  43 };
  44
  45 BENCHMARK_FUNC(LogDebugDisabled)
  46 {
  47     LogLevelSetter level(wxLOG_Info);
  48
  49     wxLogDebug("Ignored debug message: %s", NotCreated().AsStr());
  50
  51     return true;
  52 }
  53
  54 BENCHMARK_FUNC(LogTraceDisabled)
  55 {
  56     LogLevelSetter level(wxLOG_Info);
  57
  58     wxLogTrace("", NotCreated().AsStr());
  59
  60     return true;
  61 }
  62
  63 BENCHMARK_FUNC(LogTraceActive)
  64 {
  65     static bool s_added = false;
  66     if ( !s_added )
  67     {
  68         s_added = true;
  69         wxLog::AddTraceMask("logbench");
  70     }
  71
  72     // Remove the actual logging overhead by simply throwing away the log
  73     // messages.
  74     class NulLog : public wxLog
  75     {
  76     public:
  77         NulLog()
  78             : m_logOld(wxLog::SetActiveTarget(this))
  79         {
  80         }
  81
  82         virtual ~NulLog()
  83         {
  84             wxLog::SetActiveTarget(m_logOld);
  85         }
  86
  87     protected:
  88         virtual void DoLogRecord(wxLogLevel,
  89                                  const wxString&,
  90                                  const wxLogRecordInfo&)
  91         {
  92         }
  93
  94         wxLog* m_logOld;
  95     };
  96
  97     NulLog nulLog;
  98
  99     wxLogTrace("logbench", "Trace message");
 100
 101     return true;
 102 }
 103
 104 BENCHMARK_FUNC(LogTraceInactive)
 105 {
 106     wxLogTrace("bloordyblop", "Trace message");
 107
 108     return true;
 109 }