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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/**
* @file llpreprocessor.h
* @brief This file should be included in all Linden Lab files and
* should only contain special preprocessor directives
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LLPREPROCESSOR_H
#define LLPREPROCESSOR_H
// Figure out endianness of platform
#ifdef LL_LINUX
#define __ENABLE_WSTRING
#include <endian.h>
#elif defined(__FreeBSD__)
#include <sys/endian.h>
#endif // LL_LINUX
#if (defined(LL_WINDOWS) || (defined(LL_LINUX) && (__BYTE_ORDER == __LITTLE_ENDIAN)) || (defined(LL_DARWIN) && defined(__LITTLE_ENDIAN__)) || (defined(__FreeBSD__) && (_BYTE_ORDER == _LITTLE_ENDIAN)))
#define LL_LITTLE_ENDIAN 1
#else
#define LL_BIG_ENDIAN 1
#endif
// Per-compiler switches
#ifdef __GNUC__
#define LL_FORCE_INLINE inline __attribute__((always_inline))
#else
#define LL_FORCE_INLINE __forceinline
#endif
// Mark-up expressions with branch prediction hints. Do NOT use
// this with reckless abandon - it's an obfuscating micro-optimization
// outside of inner loops or other places where you are OVERWHELMINGLY
// sure which way an expression almost-always evaluates.
#if __GNUC__ >= 3
# define LL_LIKELY(EXPR) __builtin_expect (!!(EXPR), true)
# define LL_UNLIKELY(EXPR) __builtin_expect (!!(EXPR), false)
#else
# define LL_LIKELY(EXPR) (EXPR)
# define LL_UNLIKELY(EXPR) (EXPR)
#endif
// Figure out differences between compilers
#if defined(__GNUC__)
#define GCC_VERSION (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100 \
+ __GNUC_PATCHLEVEL__)
#ifndef LL_GNUC
#define LL_GNUC 1
#endif
#elif defined(__MSVC_VER__) || defined(_MSC_VER)
#ifndef LL_MSVC
#define LL_MSVC 1
#endif
#endif
// Deal with minor differences on Unixy OSes.
#if LL_DARWIN || LL_LINUX || __FreeBSD__
// Different name, same functionality.
#define stricmp strcasecmp
#define strnicmp strncasecmp
// Not sure why this is different, but...
#ifndef MAX_PATH
#define MAX_PATH PATH_MAX
#endif // not MAX_PATH
#endif
// Although thread_local is now a standard storage class, we can't just
// #define LL_THREAD_LOCAL as thread_local because the *usage* is different.
// We'll have to take the time to change LL_THREAD_LOCAL declarations by hand.
#if LL_WINDOWS
# define LL_THREAD_LOCAL __declspec(thread)
#else
# define LL_THREAD_LOCAL __thread
#endif
#if defined(LL_WINDOWS)
#define BOOST_REGEX_NO_LIB 1
#define CURL_STATICLIB 1
#ifndef XML_STATIC
#define XML_STATIC
#endif
#endif // LL_WINDOWS
// Deal with VC++ problems
#if LL_MSVC
// level 4 warnings that we need to disable:
#pragma warning (disable : 4251) // member needs to have dll-interface to be used by clients of class
#pragma warning (disable : 4275) // non dll-interface class used as base for dll-interface class
#endif // LL_MSVC
#if LL_WINDOWS
#define LL_DLLEXPORT __declspec(dllexport)
#define LL_DLLIMPORT __declspec(dllimport)
#elif LL_LINUX
#define LL_DLLEXPORT __attribute__ ((visibility("default")))
#define LL_DLLIMPORT
#else
#define LL_DLLEXPORT
#define LL_DLLIMPORT
#endif // LL_WINDOWS
#if __clang__ || ! defined(LL_WINDOWS)
// Only on Windows, and only with the Microsoft compiler (vs. clang) is
// wchar_t potentially not a distinct type.
#define LL_WCHAR_T_NATIVE 1
#else // LL_WINDOWS
// https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
// _WCHAR_T_DEFINED is defined if wchar_t is provided at all.
// Specifically, it has value 1 if wchar_t is an intrinsic type, else empty.
// _NATIVE_WCHAR_T_DEFINED has value 1 if wchar_t is intrinsic, else undefined.
// For years we have compiled with /Zc:wchar_t-, meaning that wchar_t is a
// typedef for unsigned short (in stddef.h). Lore has it that one of our
// proprietary binary-only libraries has traditionally been built that way and
// therefore EVERYTHING ELSE requires it. Therefore, in a typical Linden
// Windows build, _WCHAR_T_DEFINED is defined but empty, while
// _NATIVE_WCHAR_T_DEFINED is undefined.
# if defined(_NATIVE_WCHAR_T_DEFINED)
# define LL_WCHAR_T_NATIVE 1
# endif // _NATIVE_WCHAR_T_DEFINED
#endif // LL_WINDOWS
#if LL_COMMON_LINK_SHARED
// CMake automagically defines llcommon_EXPORTS only when building llcommon
// sources, and only when llcommon is a shared library (i.e. when
// LL_COMMON_LINK_SHARED). We must still test LL_COMMON_LINK_SHARED because
// otherwise we can't distinguish between (non-llcommon source) and (llcommon
// not shared).
# if defined(llcommon_EXPORTS)
# define LL_COMMON_API LL_DLLEXPORT
# else //llcommon_EXPORTS
# define LL_COMMON_API LL_DLLIMPORT
# endif //llcommon_EXPORTS
#else // LL_COMMON_LINK_SHARED
# define LL_COMMON_API
#endif // LL_COMMON_LINK_SHARED
// With C++11, decltype() is standard. We no longer need a platform-dependent
// macro to get the type of an expression.
#define LL_TYPEOF(expr) decltype(expr)
#define LL_TO_STRING_HELPER(x) #x
#define LL_TO_STRING(x) LL_TO_STRING_HELPER(x)
#define LL_TO_WSTRING_HELPER(x) L#x
#define LL_TO_WSTRING(x) LL_TO_WSTRING_HELPER(x)
#define LL_FILE_LINENO_MSG(msg) __FILE__ "(" LL_TO_STRING(__LINE__) ") : " msg
#define LL_GLUE_IMPL(x, y) x##y
#define LL_GLUE_TOKENS(x, y) LL_GLUE_IMPL(x, y)
#if LL_WINDOWS
#define LL_COMPILE_TIME_MESSAGE(msg) __pragma(message(LL_FILE_LINENO_MSG(msg)))
#else
// no way to get gcc 4.2 to print a user-defined diagnostic message only when a macro is used
#define LL_COMPILE_TIME_MESSAGE(msg)
#endif
// __FUNCTION__ works on all the platforms we care about, but...
#if LL_WINDOWS
#define LL_PRETTY_FUNCTION __FUNCSIG__
#else
#define LL_PRETTY_FUNCTION __PRETTY_FUNCTION__
#endif
#endif // not LL_LINDEN_PREPROCESSOR_H
|
