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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.
17struct 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.
25class LogLevelSetter
26{
27public:
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
39private:
40 const wxLogLevel m_levelOld;
41
42 wxDECLARE_NO_COPY_CLASS(LogLevelSetter);
43};
44
45BENCHMARK_FUNC(LogDebugDisabled)
46{
47 LogLevelSetter level(wxLOG_Info);
48
49 wxLogDebug("Ignored debug message: %s", NotCreated().AsStr());
50
51 return true;
52}
53
54BENCHMARK_FUNC(LogTraceDisabled)
55{
56 LogLevelSetter level(wxLOG_Info);
57
58 wxLogTrace("", NotCreated().AsStr());
59
60 return true;
61}
62
63BENCHMARK_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
104BENCHMARK_FUNC(LogTraceInactive)
105{
106 wxLogTrace("bloordyblop", "Trace message");
107
108 return true;
109}