summaryrefslogtreecommitdiffstats
path: root/xpcom/components/ModuleUtils.h
blob: 1e4c5218d943485d95812b8596ddc5aa888590a5 (plain)
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
/* -*- 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_GenericModule_h
#define mozilla_GenericModule_h

#include "mozilla/Attributes.h"
#include "mozilla/Module.h"

#define NS_GENERIC_FACTORY_CONSTRUCTOR(_InstanceClass)                        \
static nsresult                                                               \
_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID,               \
                            void **aResult)                                   \
{                                                                             \
  RefPtr<_InstanceClass> inst;                                                \
                                                                              \
  *aResult = nullptr;                                                         \
  if (nullptr != aOuter) {                                                    \
    return NS_ERROR_NO_AGGREGATION;                                           \
  }                                                                           \
                                                                              \
  inst = new _InstanceClass();                                                \
  return inst->QueryInterface(aIID, aResult);                                 \
}

#define NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(_InstanceClass, _InitMethod)      \
static nsresult                                                               \
_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID,               \
                            void **aResult)                                   \
{                                                                             \
  nsresult rv;                                                                \
                                                                              \
  RefPtr<_InstanceClass> inst;                                                \
                                                                              \
  *aResult = nullptr;                                                         \
  if (nullptr != aOuter) {                                                    \
    return NS_ERROR_NO_AGGREGATION;                                           \
  }                                                                           \
                                                                              \
  inst = new _InstanceClass();                                                \
  rv = inst->_InitMethod();                                                   \
  if (NS_SUCCEEDED(rv)) {                                                     \
    rv = inst->QueryInterface(aIID, aResult);                                 \
  }                                                                           \
                                                                              \
  return rv;                                                                  \
}

// 'Constructor' that uses an existing getter function that gets a singleton.
// NOTE: assumes that getter does an AddRef - so additional AddRef is not done.
#define NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR(_InstanceClass, _GetterProc) \
static nsresult                                                               \
_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID,               \
                            void **aResult)                                   \
{                                                                             \
  RefPtr<_InstanceClass> inst;                                                \
                                                                              \
  *aResult = nullptr;                                                         \
  if (nullptr != aOuter) {                                                    \
    return NS_ERROR_NO_AGGREGATION;                                           \
  }                                                                           \
                                                                              \
  inst = already_AddRefed<_InstanceClass>(_GetterProc());                     \
  if (nullptr == inst) {                                                      \
    return NS_ERROR_OUT_OF_MEMORY;                                            \
  }                                                                           \
  return inst->QueryInterface(aIID, aResult);                                 \
}

#ifndef MOZILLA_INTERNAL_API

#include "nsIModule.h"
#include "nsISupportsUtils.h"

namespace mozilla {

class GenericModule final : public nsIModule
{
  ~GenericModule() {}

public:
  explicit GenericModule(const mozilla::Module* aData) : mData(aData) {}

  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIMODULE

private:
  const mozilla::Module* mData;
};

} // namespace mozilla

#endif

#endif // mozilla_GenericModule_h