This repository was archived by the owner on Nov 15, 2024. It is now read-only.
forked from nodejs/node
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathhandle_wrap.cc
More file actions
183 lines (145 loc) · 5.4 KB
/
handle_wrap.cc
File metadata and controls
183 lines (145 loc) · 5.4 KB
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
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "handle_wrap.h"
#include "async_wrap-inl.h"
#include "env-inl.h"
#include "node_external_reference.h"
#include "util-inl.h"
namespace node {
using v8::Context;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Local;
using v8::Object;
using v8::Value;
void HandleWrap::Ref(const FunctionCallbackInfo<Value>& args) {
HandleWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
if (IsAlive(wrap))
uv_ref(wrap->GetHandle());
}
void HandleWrap::Unref(const FunctionCallbackInfo<Value>& args) {
HandleWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
if (IsAlive(wrap))
uv_unref(wrap->GetHandle());
}
void HandleWrap::HasRef(const FunctionCallbackInfo<Value>& args) {
HandleWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
args.GetReturnValue().Set(HasRef(wrap));
}
void HandleWrap::Close(const FunctionCallbackInfo<Value>& args) {
HandleWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
wrap->Close(args[0]);
}
void HandleWrap::Close(Local<Value> close_callback) {
if (state_ != kInitialized)
return;
uv_close(handle_, OnClose);
state_ = kClosing;
if (!close_callback.IsEmpty() && close_callback->IsFunction() &&
!persistent().IsEmpty()) {
object()->Set(env()->context(),
env()->handle_onclose_symbol(),
close_callback).Check();
}
}
void HandleWrap::OnGCCollect() {
// When all references to a HandleWrap are lost and the object is supposed to
// be destroyed, we first call Close() to clean up the underlying libuv
// handle. The OnClose callback then acquires and destroys another reference
// to that object, and when that reference is lost, we perform the default
// action (i.e. destroying `this`).
if (state_ != kClosed) {
Close();
} else {
BaseObject::OnGCCollect();
}
}
bool HandleWrap::IsNotIndicativeOfMemoryLeakAtExit() const {
return IsWeakOrDetached() ||
!HandleWrap::HasRef(this) ||
!uv_is_active(GetHandle());
}
void HandleWrap::MarkAsInitialized() {
env()->handle_wrap_queue()->PushBack(this);
state_ = kInitialized;
}
void HandleWrap::MarkAsUninitialized() {
handle_wrap_queue_.Remove();
state_ = kClosed;
}
HandleWrap::HandleWrap(Environment* env,
Local<Object> object,
uv_handle_t* handle,
AsyncWrap::ProviderType provider)
: AsyncWrap(env, object, provider),
state_(kInitialized),
handle_(handle) {
handle_->data = this;
HandleScope scope(env->isolate());
CHECK(env->has_run_bootstrapping_code());
env->handle_wrap_queue()->PushBack(this);
}
void HandleWrap::OnClose(uv_handle_t* handle) {
CHECK_NOT_NULL(handle->data);
BaseObjectPtr<HandleWrap> wrap { static_cast<HandleWrap*>(handle->data) };
wrap->Detach();
Environment* env = wrap->env();
HandleScope scope(env->isolate());
Context::Scope context_scope(env->context());
CHECK_EQ(wrap->state_, kClosing);
wrap->state_ = kClosed;
wrap->OnClose();
wrap->handle_wrap_queue_.Remove();
if (!wrap->persistent().IsEmpty() &&
wrap->object()->Has(env->context(), env->handle_onclose_symbol())
.FromMaybe(false)) {
wrap->MakeCallback(env->handle_onclose_symbol(), 0, nullptr);
}
}
Local<FunctionTemplate> HandleWrap::GetConstructorTemplate(Environment* env) {
Local<FunctionTemplate> tmpl = env->handle_wrap_ctor_template();
if (tmpl.IsEmpty()) {
tmpl = env->NewFunctionTemplate(nullptr);
tmpl->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "HandleWrap"));
tmpl->Inherit(AsyncWrap::GetConstructorTemplate(env));
env->SetProtoMethod(tmpl, "close", HandleWrap::Close);
env->SetProtoMethodNoSideEffect(tmpl, "hasRef", HandleWrap::HasRef);
env->SetProtoMethod(tmpl, "ref", HandleWrap::Ref);
env->SetProtoMethod(tmpl, "unref", HandleWrap::Unref);
env->set_handle_wrap_ctor_template(tmpl);
}
return tmpl;
}
void HandleWrap::RegisterExternalReferences(
ExternalReferenceRegistry* registry) {
registry->Register(HandleWrap::Close);
registry->Register(HandleWrap::HasRef);
registry->Register(HandleWrap::Ref);
registry->Register(HandleWrap::Unref);
}
} // namespace node
NODE_MODULE_EXTERNAL_REFERENCE(handle_wrap,
node::HandleWrap::RegisterExternalReferences)