1/****************************************************************************
2**
3** Copyright (C) 2017 The Qt Company Ltd.
4** Copyright (C) 2015 Intel Corporation.
5** Contact: https://www.qt.io/licensing/
6**
7** This file is part of the QtCore module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial License Usage
11** Licensees holding valid commercial Qt licenses may use this file in
12** accordance with the commercial license agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and The Qt Company. For licensing terms
15** and conditions see https://www.qt.io/terms-conditions. For further
16** information use the contact form at https://www.qt.io/contact-us.
17**
18** GNU Lesser General Public License Usage
19** Alternatively, this file may be used under the terms of the GNU Lesser
20** General Public License version 3 as published by the Free Software
21** Foundation and appearing in the file LICENSE.LGPL3 included in the
22** packaging of this file. Please review the following information to
23** ensure the GNU Lesser General Public License version 3 requirements
24** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
25**
26** GNU General Public License Usage
27** Alternatively, this file may be used under the terms of the GNU
28** General Public License version 2.0 or (at your option) the GNU General
29** Public license version 3 or any later version approved by the KDE Free
30** Qt Foundation. The licenses are as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
32** included in the packaging of this file. Please review the following
33** information to ensure the GNU General Public License requirements will
34** be met: https://www.gnu.org/licenses/gpl-2.0.html and
35** https://www.gnu.org/licenses/gpl-3.0.html.
36**
37** $QT_END_LICENSE$
38**
39****************************************************************************/
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
69QT_BEGIN_NAMESPACE
70
71// These behave as if they consult the environment, so need to share its locking:
72Q_CORE_EXPORT void qTzSet();
73Q_CORE_EXPORT time_t qMkTime(struct tm *when);
74
75QT_END_NAMESPACE
76
77#if !__has_builtin(__builtin_available)
78#include <initializer_list>
79#include <QtCore/qoperatingsystemversion.h>
80#include <QtCore/qversionnumber.h>
81
82QT_BEGIN_NAMESPACE
83
84struct qt_clang_builtin_available_os_version_data {
85 QOperatingSystemVersion::OSType type;
86 const char *version;
87};
88
89static 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
108QT_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

source code of qtbase/src/corelib/global/qglobal_p.h