This repository was archived by the owner on Oct 12, 2021. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 3
/
Copy pathTypes.h
134 lines (121 loc) · 4.08 KB
/
Types.h
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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* mfbt foundational types and macros. */
#ifndef mozilla_Types_h
#define mozilla_Types_h
/*
* This header must be valid C and C++, includable by code embedding either
* SpiderMonkey or Gecko.
*/
/* Expose all <stdint.h> types and size_t. */
#include <stddef.h>
#include <stdint.h>
/* Implement compiler and linker macros needed for APIs. */
/*
* MOZ_EXPORT is used to declare and define a symbol or type which is externally
* visible to users of the current library. It encapsulates various decorations
* needed to properly export the method's symbol.
*
* api.h:
* extern MOZ_EXPORT int MeaningOfLife(void);
* extern MOZ_EXPORT int LuggageCombination;
*
* api.c:
* int MeaningOfLife(void) { return 42; }
* int LuggageCombination = 12345;
*
* If you are merely sharing a method across files, just use plain |extern|.
* These macros are designed for use by library interfaces -- not for normal
* methods or data used cross-file.
*/
#if defined(WIN32)
# define MOZ_EXPORT __declspec(dllexport)
#else /* Unix */
# ifdef HAVE_VISIBILITY_ATTRIBUTE
# define MOZ_EXPORT __attribute__((visibility("default")))
# elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
# define MOZ_EXPORT __global
# else
# define MOZ_EXPORT /* nothing */
# endif
#endif
/*
* Whereas implementers use MOZ_EXPORT to declare and define library symbols,
* users use MOZ_IMPORT_API and MOZ_IMPORT_DATA to access them. Most often the
* implementer of the library will expose an API macro which expands to either
* the export or import version of the macro, depending upon the compilation
* mode.
*/
#ifdef _WIN32
# if defined(__MWERKS__)
# define MOZ_IMPORT_API /* nothing */
# else
# define MOZ_IMPORT_API __declspec(dllimport)
# endif
#else
# define MOZ_IMPORT_API MOZ_EXPORT
#endif
#if defined(_WIN32) && !defined(__MWERKS__)
# define MOZ_IMPORT_DATA __declspec(dllimport)
#else
# define MOZ_IMPORT_DATA MOZ_EXPORT
#endif
/*
* Consistent with the above comment, the MFBT_API and MFBT_DATA macros expose
* export mfbt declarations when building mfbt, and they expose import mfbt
* declarations when using mfbt.
*/
#if defined(IMPL_MFBT)
# define MFBT_API MOZ_EXPORT
# define MFBT_DATA MOZ_EXPORT
#else
/*
* On linux mozglue is linked in the program and we link libxul.so with
* -z,defs. Normally that causes the linker to reject undefined references in
* libxul.so, but as a loophole it allows undefined references to weak
* symbols. We add the weak attribute to the import version of the MFBT API
* macros to exploit this.
*/
# if defined(MOZ_GLUE_IN_PROGRAM)
# define MFBT_API __attribute__((weak)) MOZ_IMPORT_API
# define MFBT_DATA __attribute__((weak)) MOZ_IMPORT_DATA
# else
# define MFBT_API MOZ_IMPORT_API
# define MFBT_DATA MOZ_IMPORT_DATA
# endif
#endif
/*
* C symbols in C++ code must be declared immediately within |extern "C"|
* blocks. However, in C code, they need not be declared specially. This
* difference is abstracted behind the MOZ_BEGIN_EXTERN_C and MOZ_END_EXTERN_C
* macros, so that the user need not know whether he is being used in C or C++
* code.
*
* MOZ_BEGIN_EXTERN_C
*
* extern MOZ_EXPORT int MostRandomNumber(void);
* ...other declarations...
*
* MOZ_END_EXTERN_C
*
* This said, it is preferable to just use |extern "C"| in C++ header files for
* its greater clarity.
*/
#ifdef __cplusplus
# define MOZ_BEGIN_EXTERN_C extern "C" {
# define MOZ_END_EXTERN_C }
#else
# define MOZ_BEGIN_EXTERN_C
# define MOZ_END_EXTERN_C
#endif
/*
* GCC's typeof is available when decltype is not.
*/
#if defined(__GNUC__) && defined(__cplusplus) && \
!defined(__GXX_EXPERIMENTAL_CXX0X__) && __cplusplus < 201103L
# define decltype __typeof__
#endif
#endif /* mozilla_Types_h */