1// Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QTUDEV_P_H
5#define QTUDEV_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#ifdef LINK_LIBUDEV
19extern "C"
20{
21#include <libudev.h>
22}
23#else
24#include <QtCore/qlibrary.h>
25#include <QtCore/qstring.h>
26#include <QtCore/qdebug.h>
27#include <QtCore/private/qglobal_p.h>
28
29#define GENERATE_SYMBOL_VARIABLE(returnType, symbolName, ...) \
30 typedef returnType (*fp_##symbolName)(__VA_ARGS__); \
31 static fp_##symbolName symbolName;
32
33#define RESOLVE_SYMBOL(symbolName) \
34 symbolName = (fp_##symbolName)resolveSymbol(udevLibrary, #symbolName); \
35 if (!symbolName) \
36 return false;
37
38struct udev;
39
40#define udev_list_entry_foreach(list_entry, first_entry) \
41 for (list_entry = first_entry; \
42 list_entry != nullptr; \
43 list_entry = udev_list_entry_get_next(list_entry))
44
45struct udev_device;
46struct udev_enumerate;
47struct udev_list_entry;
48
49GENERATE_SYMBOL_VARIABLE(struct ::udev *, udev_new);
50GENERATE_SYMBOL_VARIABLE(struct ::udev_enumerate *, udev_enumerate_new, struct ::udev *)
51GENERATE_SYMBOL_VARIABLE(int, udev_enumerate_add_match_subsystem, struct udev_enumerate *, const char *)
52GENERATE_SYMBOL_VARIABLE(int, udev_enumerate_scan_devices, struct udev_enumerate *)
53GENERATE_SYMBOL_VARIABLE(struct udev_list_entry *, udev_enumerate_get_list_entry, struct udev_enumerate *)
54GENERATE_SYMBOL_VARIABLE(struct udev_list_entry *, udev_list_entry_get_next, struct udev_list_entry *)
55GENERATE_SYMBOL_VARIABLE(struct udev_device *, udev_device_new_from_syspath, struct udev *udev, const char *syspath)
56GENERATE_SYMBOL_VARIABLE(const char *, udev_list_entry_get_name, struct udev_list_entry *)
57GENERATE_SYMBOL_VARIABLE(const char *, udev_device_get_devnode, struct udev_device *)
58GENERATE_SYMBOL_VARIABLE(const char *, udev_device_get_sysname, struct udev_device *)
59GENERATE_SYMBOL_VARIABLE(const char *, udev_device_get_driver, struct udev_device *)
60GENERATE_SYMBOL_VARIABLE(struct udev_device *, udev_device_get_parent, struct udev_device *)
61GENERATE_SYMBOL_VARIABLE(const char *, udev_device_get_subsystem, struct udev_device *)
62GENERATE_SYMBOL_VARIABLE(const char *, udev_device_get_property_value, struct udev_device *, const char *)
63GENERATE_SYMBOL_VARIABLE(void, udev_device_unref, struct udev_device *)
64GENERATE_SYMBOL_VARIABLE(void, udev_enumerate_unref, struct udev_enumerate *)
65GENERATE_SYMBOL_VARIABLE(void, udev_unref, struct udev *)
66
67inline QFunctionPointer resolveSymbol(QLibrary *udevLibrary, const char *symbolName)
68{
69 QFunctionPointer symbolFunctionPointer = udevLibrary->resolve(symbolName);
70 if (!symbolFunctionPointer)
71 qWarning("Failed to resolve the udev symbol: %s", symbolName);
72
73 return symbolFunctionPointer;
74}
75
76inline bool resolveSymbols(QLibrary *udevLibrary)
77{
78 if (!udevLibrary->isLoaded()) {
79 udevLibrary->setFileNameAndVersion(QStringLiteral("udev"), 1);
80 if (!udevLibrary->load()) {
81 udevLibrary->setFileNameAndVersion(QStringLiteral("udev"), 0);
82 if (!udevLibrary->load()) {
83 qWarning("Failed to load the library: %s, supported version(s): %i and %i", qPrintable(udevLibrary->fileName()), 1, 0);
84 return false;
85 }
86 }
87 }
88
89 RESOLVE_SYMBOL(udev_new)
90 RESOLVE_SYMBOL(udev_enumerate_new)
91 RESOLVE_SYMBOL(udev_enumerate_add_match_subsystem)
92 RESOLVE_SYMBOL(udev_enumerate_scan_devices)
93 RESOLVE_SYMBOL(udev_enumerate_get_list_entry)
94 RESOLVE_SYMBOL(udev_list_entry_get_next)
95 RESOLVE_SYMBOL(udev_device_new_from_syspath)
96 RESOLVE_SYMBOL(udev_list_entry_get_name)
97 RESOLVE_SYMBOL(udev_device_get_devnode)
98 RESOLVE_SYMBOL(udev_device_get_sysname)
99 RESOLVE_SYMBOL(udev_device_get_driver)
100 RESOLVE_SYMBOL(udev_device_get_parent)
101 RESOLVE_SYMBOL(udev_device_get_subsystem)
102 RESOLVE_SYMBOL(udev_device_get_property_value)
103 RESOLVE_SYMBOL(udev_device_unref)
104 RESOLVE_SYMBOL(udev_enumerate_unref)
105 RESOLVE_SYMBOL(udev_unref)
106
107 return true;
108}
109
110#endif
111
112#endif
113

source code of qtserialport/src/serialport/qtudev_p.h