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
|
/* 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/. */
#include "DiskSpaceWatcher.h"
#include "nsIObserverService.h"
#include "nsXULAppAPI.h"
#include "mozilla/Hal.h"
#include "mozilla/ModuleUtils.h"
#include "mozilla/Preferences.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Services.h"
#define NS_DISKSPACEWATCHER_CID \
{ 0xab218518, 0xf197, 0x4fb4, { 0x8b, 0x0f, 0x8b, 0xb3, 0x4d, 0xf2, 0x4b, 0xf4 } }
using namespace mozilla;
StaticRefPtr<DiskSpaceWatcher> gDiskSpaceWatcher;
NS_IMPL_ISUPPORTS(DiskSpaceWatcher, nsIDiskSpaceWatcher, nsIObserver)
uint64_t DiskSpaceWatcher::sFreeSpace = 0;
bool DiskSpaceWatcher::sIsDiskFull = false;
DiskSpaceWatcher::DiskSpaceWatcher()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!gDiskSpaceWatcher);
}
DiskSpaceWatcher::~DiskSpaceWatcher()
{
MOZ_ASSERT(!gDiskSpaceWatcher);
}
already_AddRefed<DiskSpaceWatcher>
DiskSpaceWatcher::FactoryCreate()
{
if (!XRE_IsParentProcess()) {
return nullptr;
}
MOZ_ASSERT(NS_IsMainThread());
if (!Preferences::GetBool("disk_space_watcher.enabled", false)) {
return nullptr;
}
if (!gDiskSpaceWatcher) {
gDiskSpaceWatcher = new DiskSpaceWatcher();
ClearOnShutdown(&gDiskSpaceWatcher);
}
RefPtr<DiskSpaceWatcher> service = gDiskSpaceWatcher.get();
return service.forget();
}
NS_IMETHODIMP
DiskSpaceWatcher::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData)
{
MOZ_ASSERT(NS_IsMainThread());
if (!strcmp(aTopic, "profile-after-change")) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
observerService->AddObserver(this, "profile-before-change", false);
mozilla::hal::StartDiskSpaceWatcher();
return NS_OK;
}
if (!strcmp(aTopic, "profile-before-change")) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
observerService->RemoveObserver(this, "profile-before-change");
mozilla::hal::StopDiskSpaceWatcher();
return NS_OK;
}
MOZ_ASSERT(false, "DiskSpaceWatcher got unexpected topic!");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP DiskSpaceWatcher::GetIsDiskFull(bool* aIsDiskFull)
{
*aIsDiskFull = sIsDiskFull;
return NS_OK;
}
// GetFreeSpace is a macro on windows, and that messes up with the c++
// compiler.
#ifdef XP_WIN
#undef GetFreeSpace
#endif
NS_IMETHODIMP DiskSpaceWatcher::GetFreeSpace(uint64_t* aFreeSpace)
{
*aFreeSpace = sFreeSpace;
return NS_OK;
}
// static
void DiskSpaceWatcher::UpdateState(bool aIsDiskFull, uint64_t aFreeSpace)
{
MOZ_ASSERT(NS_IsMainThread());
if (!gDiskSpaceWatcher) {
return;
}
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
sIsDiskFull = aIsDiskFull;
sFreeSpace = aFreeSpace;
if (!observerService) {
return;
}
const char16_t stateFull[] = { 'f', 'u', 'l', 'l', 0 };
const char16_t stateFree[] = { 'f', 'r', 'e', 'e', 0 };
nsCOMPtr<nsISupports> subject;
CallQueryInterface(gDiskSpaceWatcher.get(), getter_AddRefs(subject));
MOZ_ASSERT(subject);
observerService->NotifyObservers(subject,
DISKSPACEWATCHER_OBSERVER_TOPIC,
sIsDiskFull ? stateFull : stateFree);
return;
}
NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR(DiskSpaceWatcher,
DiskSpaceWatcher::FactoryCreate)
NS_DEFINE_NAMED_CID(NS_DISKSPACEWATCHER_CID);
static const mozilla::Module::CIDEntry kDiskSpaceWatcherCIDs[] = {
{ &kNS_DISKSPACEWATCHER_CID, false, nullptr, DiskSpaceWatcherConstructor },
{ nullptr }
};
static const mozilla::Module::ContractIDEntry kDiskSpaceWatcherContracts[] = {
{ "@mozilla.org/toolkit/disk-space-watcher;1", &kNS_DISKSPACEWATCHER_CID },
{ nullptr }
};
static const mozilla::Module::CategoryEntry kDiskSpaceWatcherCategories[] = {
{ nullptr }
};
static const mozilla::Module kDiskSpaceWatcherModule = {
mozilla::Module::kVersion,
kDiskSpaceWatcherCIDs,
kDiskSpaceWatcherContracts,
kDiskSpaceWatcherCategories
};
NSMODULE_DEFN(DiskSpaceWatcherModule) = &kDiskSpaceWatcherModule;
|
