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40
41 #ifndef QGLOBAL_P_H
42 #define QGLOBAL_P_H
43
44 //
45 // W A R N I N G
46 // -------------
47 //
48 // This file is not part of the Qt API. It exists purely as an
49 // implementation detail. This header file may change from version to
50 // version without notice, or even be removed.
51 //
52 // We mean it.
53 //
54
55 #include "qglobal.h"
56 #include "qglobal_p.h" // include self to avoid syncqt warning - no-op
57
58 #ifndef QT_BOOTSTRAPPED
59 #include <QtCore/private/qconfig_p.h>
60 #include <QtCore/private/qtcore-config_p.h>
61 #endif
62
63 #if defined(__cplusplus)
64 #ifdef Q_CC_MINGW
65 # include <unistd.h> // Define _POSIX_THREAD_SAFE_FUNCTIONS to obtain localtime_r()
66 #endif
67 #include <time.h>
68
69 QT_BEGIN_NAMESPACE
70
71 // These behave as if they consult the environment, so need to share its locking:
72 Q_CORE_EXPORT void qTzSet();
73 Q_CORE_EXPORT time_t qMkTime(struct tm *when);
74
75 QT_END_NAMESPACE
76
77 #if !__has_builtin(__builtin_available)
78 #include <initializer_list>
79 #include <QtCore/qoperatingsystemversion.h>
80 #include <QtCore/qversionnumber.h>
81
82 QT_BEGIN_NAMESPACE
83
84 struct qt_clang_builtin_available_os_version_data {
85 QOperatingSystemVersion::OSType type;
86 const char *version;
87 };
88
qt_clang_builtin_available(const std::initializer_list<qt_clang_builtin_available_os_version_data> & versions)89 static inline bool qt_clang_builtin_available(
90 const std::initializer_list<qt_clang_builtin_available_os_version_data> &versions)
91 {
92 for (auto it = versions.begin(); it != versions.end(); ++it) {
93 if (QOperatingSystemVersion::currentType() == it->type) {
94 const auto current = QOperatingSystemVersion::current();
95 return QVersionNumber(
96 current.majorVersion(),
97 current.minorVersion(),
98 current.microVersion()) >= QVersionNumber::fromString(
99 QString::fromLatin1(it->version));
100 }
101 }
102
103 // Result is true if the platform is not any of the checked ones; this matches behavior of
104 // LLVM __builtin_available and @available constructs
105 return true;
106 }
107
108 QT_END_NAMESPACE
109
110 #define QT_AVAILABLE_OS_VER(os, ver) \
111 QT_PREPEND_NAMESPACE(qt_clang_builtin_available_os_version_data){\
112 QT_PREPEND_NAMESPACE(QOperatingSystemVersion)::os, #ver}
113 #define QT_AVAILABLE_CAT(L, R) QT_AVAILABLE_CAT_(L, R)
114 #define QT_AVAILABLE_CAT_(L, R) L ## R
115 #define QT_AVAILABLE_EXPAND(...) QT_AVAILABLE_OS_VER(__VA_ARGS__)
116 #define QT_AVAILABLE_SPLIT(os_ver) QT_AVAILABLE_EXPAND(QT_AVAILABLE_CAT(QT_AVAILABLE_SPLIT_, os_ver))
117 #define QT_AVAILABLE_SPLIT_macOS MacOS,
118 #define QT_AVAILABLE_SPLIT_iOS IOS,
119 #define QT_AVAILABLE_SPLIT_tvOS TvOS,
120 #define QT_AVAILABLE_SPLIT_watchOS WatchOS,
121 #define QT_BUILTIN_AVAILABLE0(e) \
122 QT_PREPEND_NAMESPACE(qt_clang_builtin_available)({})
123 #define QT_BUILTIN_AVAILABLE1(a, e) \
124 QT_PREPEND_NAMESPACE(qt_clang_builtin_available)({QT_AVAILABLE_SPLIT(a)})
125 #define QT_BUILTIN_AVAILABLE2(a, b, e) \
126 QT_PREPEND_NAMESPACE(qt_clang_builtin_available)({QT_AVAILABLE_SPLIT(a), \
127 QT_AVAILABLE_SPLIT(b)})
128 #define QT_BUILTIN_AVAILABLE3(a, b, c, e) \
129 QT_PREPEND_NAMESPACE(qt_clang_builtin_available)({QT_AVAILABLE_SPLIT(a), \
130 QT_AVAILABLE_SPLIT(b), \
131 QT_AVAILABLE_SPLIT(c)})
132 #define QT_BUILTIN_AVAILABLE4(a, b, c, d, e) \
133 QT_PREPEND_NAMESPACE(qt_clang_builtin_available)({QT_AVAILABLE_SPLIT(a), \
134 QT_AVAILABLE_SPLIT(b), \
135 QT_AVAILABLE_SPLIT(c), \
136 QT_AVAILABLE_SPLIT(d)})
137 #define QT_BUILTIN_AVAILABLE_ARG(arg0, arg1, arg2, arg3, arg4, arg5, ...) arg5
138 #define QT_BUILTIN_AVAILABLE_CHOOSER(...) QT_BUILTIN_AVAILABLE_ARG(__VA_ARGS__, \
139 QT_BUILTIN_AVAILABLE4, \
140 QT_BUILTIN_AVAILABLE3, \
141 QT_BUILTIN_AVAILABLE2, \
142 QT_BUILTIN_AVAILABLE1, \
143 QT_BUILTIN_AVAILABLE0, )
144 #define __builtin_available(...) QT_BUILTIN_AVAILABLE_CHOOSER(__VA_ARGS__)(__VA_ARGS__)
145 #endif // !__has_builtin(__builtin_available)
146 #endif // defined(__cplusplus)
147
148 #endif // QGLOBAL_P_H
149
150