1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QLOGGINGCATEGORY_H
#define QLOGGINGCATEGORY_H
#include <QtCore/qglobal.h>
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QLoggingCategory
{
Q_DISABLE_COPY(QLoggingCategory)
public:
explicit QLoggingCategory(const char *category, QtMsgType severityLevel = QtDebugMsg);
~QLoggingCategory();
bool isEnabled(QtMsgType type) const;
void setEnabled(QtMsgType type, bool enable);
#ifdef Q_ATOMIC_INT8_IS_SUPPORTED
bool isDebugEnabled() const { return bools.enabledDebug.loadRelaxed(); }
bool isInfoEnabled() const { return bools.enabledInfo.loadRelaxed(); }
bool isWarningEnabled() const { return bools.enabledWarning.loadRelaxed(); }
bool isCriticalEnabled() const { return bools.enabledCritical.loadRelaxed(); }
#else
bool isDebugEnabled() const { return enabled.loadRelaxed() >> DebugShift & 1; }
bool isInfoEnabled() const { return enabled.loadRelaxed() >> InfoShift & 1; }
bool isWarningEnabled() const { return enabled.loadRelaxed() >> WarningShift & 1; }
bool isCriticalEnabled() const { return enabled.loadRelaxed() >> CriticalShift & 1; }
#endif
const char *categoryName() const { return name; }
// allows usage of both factory method and variable in qCX macros
QLoggingCategory &operator()() { return *this; }
const QLoggingCategory &operator()() const { return *this; }
static QLoggingCategory *defaultCategory();
typedef void (*CategoryFilter)(QLoggingCategory*);
static CategoryFilter installFilter(CategoryFilter);
static void setFilterRules(const QString &rules);
private:
void init(const char *category, QtMsgType severityLevel);
Q_DECL_UNUSED_MEMBER void *d; // reserved for future use
const char *name;
#ifdef Q_BIG_ENDIAN
enum { DebugShift = 0, WarningShift = 8, CriticalShift = 16, InfoShift = 24 };
#else
enum { DebugShift = 24, WarningShift = 16, CriticalShift = 8, InfoShift = 0};
#endif
struct AtomicBools {
#ifdef Q_ATOMIC_INT8_IS_SUPPORTED
QBasicAtomicInteger<bool> enabledDebug;
QBasicAtomicInteger<bool> enabledWarning;
QBasicAtomicInteger<bool> enabledCritical;
QBasicAtomicInteger<bool> enabledInfo;
#endif
};
union {
AtomicBools bools;
QBasicAtomicInt enabled;
};
Q_DECL_UNUSED_MEMBER bool placeholder[4]; // reserved for future use
};
namespace { // allow different TUs to have different QT_NO_xxx_OUTPUT
template <QtMsgType Which> struct QLoggingCategoryMacroHolder
{
static const bool IsOutputEnabled;
const QLoggingCategory *category = nullptr;
bool control = false;
explicit QLoggingCategoryMacroHolder(const QLoggingCategory &cat)
{
if (IsOutputEnabled)
init(cat);
}
explicit QLoggingCategoryMacroHolder(QMessageLogger::CategoryFunction catfunc)
{
if (IsOutputEnabled)
init(catfunc());
}
void init(const QLoggingCategory &cat) noexcept
{
category = &cat;
// same as:
// control = cat.isEnabled(Which);
// but without an out-of-line call
if constexpr (Which == QtDebugMsg) {
control = cat.isDebugEnabled();
} else if constexpr (Which == QtInfoMsg) {
control = cat.isInfoEnabled();
} else if constexpr (Which == QtWarningMsg) {
control = cat.isWarningEnabled();
} else {
control = cat.isCriticalEnabled();
}
}
const char *name() const { return category->categoryName(); }
explicit operator bool() const { return Q_UNLIKELY(control); }
};
template <QtMsgType Which> const bool QLoggingCategoryMacroHolder<Which>::IsOutputEnabled = true;
#if defined(QT_NO_DEBUG_OUTPUT)
template <> const bool QLoggingCategoryMacroHolder<QtDebugMsg>::IsOutputEnabled = false;
#endif
#if defined(QT_NO_INFO_OUTPUT)
template <> const bool QLoggingCategoryMacroHolder<QtInfoMsg>::IsOutputEnabled = false;
#endif
#if defined(QT_NO_WARNING_OUTPUT)
template <> const bool QLoggingCategoryMacroHolder<QtWarningMsg>::IsOutputEnabled = false;
#endif
} // unnamed namespace
#define Q_DECLARE_LOGGING_CATEGORY(name) \
extern const QLoggingCategory &name();
#define Q_LOGGING_CATEGORY(name, ...) \
const QLoggingCategory &name() \
{ \
static const QLoggingCategory category(__VA_ARGS__); \
return category; \
}
#define QT_MESSAGE_LOGGER_COMMON(category, level) \
for (QLoggingCategoryMacroHolder<level> qt_category(category); qt_category; qt_category.control = false) \
QMessageLogger(QT_MESSAGELOG_FILE, QT_MESSAGELOG_LINE, QT_MESSAGELOG_FUNC, qt_category.name())
#define qCDebug(category, ...) QT_MESSAGE_LOGGER_COMMON(category, QtDebugMsg).debug(__VA_ARGS__)
#define qCInfo(category, ...) QT_MESSAGE_LOGGER_COMMON(category, QtInfoMsg).info(__VA_ARGS__)
#define qCWarning(category, ...) QT_MESSAGE_LOGGER_COMMON(category, QtWarningMsg).warning(__VA_ARGS__)
#define qCCritical(category, ...) QT_MESSAGE_LOGGER_COMMON(category, QtCriticalMsg).critical(__VA_ARGS__)
QT_END_NAMESPACE
#endif // QLOGGINGCATEGORY_H
|
