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