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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef mozilla_Module_h
#define mozilla_Module_h
#include "nscore.h"
#include "nsID.h"
#include "nsIFactory.h"
#include "nsCOMPtr.h" // for already_AddRefed
namespace mozilla {
/**
* A module implements one or more XPCOM components. This structure is used
* for both binary and script modules, but the registration members
* (cids/contractids/categoryentries) are unused for modules which are loaded
* via a module loader.
*/
struct Module
{
static const unsigned int kVersion = 52;
struct CIDEntry;
typedef already_AddRefed<nsIFactory> (*GetFactoryProcPtr)(
const Module& module, const CIDEntry& entry);
typedef nsresult (*ConstructorProcPtr)(nsISupports* aOuter,
const nsIID& aIID,
void** aResult);
typedef nsresult (*LoadFuncPtr)();
typedef void (*UnloadFuncPtr)();
/**
* This selector allows CIDEntrys to be marked so that they're only loaded
* into certain kinds of processes. Selectors can be combined.
*/
enum ProcessSelector
{
ANY_PROCESS = 0x0,
MAIN_PROCESS_ONLY = 0x1,
CONTENT_PROCESS_ONLY = 0x2,
/**
* By default, modules are not loaded in the GPU process, even if
* ANY_PROCESS is specified. This flag enables a module in the
* GPU process.
*/
ALLOW_IN_GPU_PROCESS = 0x4
};
/**
* The constructor callback is an implementation detail of the default binary
* loader and may be null.
*/
struct CIDEntry
{
const nsCID* cid;
bool service;
GetFactoryProcPtr getFactoryProc;
ConstructorProcPtr constructorProc;
ProcessSelector processSelector;
};
struct ContractIDEntry
{
const char* contractid;
nsID const* cid;
ProcessSelector processSelector;
};
struct CategoryEntry
{
const char* category;
const char* entry;
const char* value;
};
/**
* Binary compatibility check, should be kModuleVersion.
*/
unsigned int mVersion;
/**
* An array of CIDs (class IDs) implemented by this module. The final entry
* should be { nullptr }.
*/
const CIDEntry* mCIDs;
/**
* An array of mappings from contractid to CID. The final entry should
* be { nullptr }.
*/
const ContractIDEntry* mContractIDs;
/**
* An array of category manager entries. The final entry should be
* { nullptr }.
*/
const CategoryEntry* mCategoryEntries;
/**
* When the component manager tries to get the factory for a CID, it first
* checks for this module-level getfactory callback. If this function is
* not implemented, it checks the CIDEntry getfactory callback. If that is
* also nullptr, a generic factory is generated using the CIDEntry
* constructor callback which must be non-nullptr.
*/
GetFactoryProcPtr getFactoryProc;
/**
* Optional Function which are called when this module is loaded and
* at shutdown. These are not C++ constructor/destructors to avoid
* calling them too early in startup or too late in shutdown.
*/
LoadFuncPtr loadProc;
UnloadFuncPtr unloadProc;
/**
* Optional flags which control whether the module loads on a process-type
* basis.
*/
ProcessSelector selector;
};
} // namespace mozilla
#if defined(MOZILLA_INTERNAL_API)
# define NSMODULE_NAME(_name) _name##_NSModule
# if defined(_MSC_VER)
# pragma section(".kPStaticModules$M", read)
# pragma comment(linker, "/merge:.kPStaticModules=.rdata")
# define NSMODULE_SECTION __declspec(allocate(".kPStaticModules$M"), dllexport)
# elif defined(__GNUC__)
# if defined(__ELF__)
# define NSMODULE_SECTION __attribute__((section(".kPStaticModules"), visibility("default")))
# elif defined(__MACH__)
# define NSMODULE_SECTION __attribute__((section("__DATA, .kPStaticModules"), visibility("default")))
# elif defined (_WIN32)
# define NSMODULE_SECTION __attribute__((section(".kPStaticModules"), dllexport))
# endif
# endif
# if !defined(NSMODULE_SECTION)
# error Do not know how to define sections.
# endif
# define NSMODULE_DEFN(_name) extern NSMODULE_SECTION mozilla::Module const *const NSMODULE_NAME(_name)
#else
# define NSMODULE_NAME(_name) NSModule
# define NSMODULE_DEFN(_name) extern "C" NS_EXPORT mozilla::Module const *const NSModule
#endif
#endif // mozilla_Module_h
|
