node/src/node_isolate.cc at master · cortfr/node · GitHub

History

278 lines (199 loc) · 6.56 KB

Raw

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

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

// 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 <node.h>

#include <node_isolate.h>

#include <node_internals.h>

#include <v8.h>

#include <stdlib.h>

#include <string.h>

#include <assert.h>

namespace node {

using v8::Arguments;

using v8::Array;

using v8::False;

using v8::Handle;

using v8::HandleScope;

using v8::Integer;

using v8::Local;

using v8::Null;

using v8::Object;

using v8::ObjectTemplate;

using v8::String;

using v8::True;

using v8::Value;

static char magic_isolate_cookie_[] = "magic isolate cookie";

static volatile bool initialized;

static volatile int id;

static volatile int isolate_count;

static uv_mutex_t list_lock;

static ngx_queue_t list_head;

void Isolate::Initialize() {

if (!initialized) {

initialized = true;

if (uv_mutex_init(&list_lock)) abort();

ngx_queue_init(&list_head);

}

int Isolate::Count() {

return isolate_count;

}

void Isolate::JoinAll() {

uv_mutex_lock(&list_lock);

while (ngx_queue_empty(&list_head) == false) {

ngx_queue_t* q = ngx_queue_head(&list_head);

assert(q);

Isolate* isolate = ngx_queue_data(q, Isolate, list_member_);

assert(isolate);

// Unlock the list while we join the thread.

uv_mutex_unlock(&list_lock);

uv_thread_join(&isolate->tid_);

// Relock to check the next element in the list.

uv_mutex_lock(&list_lock);

}

// Unlock the list finally.

uv_mutex_unlock(&list_lock);

}

Isolate::Isolate() {

uv_mutex_lock(&list_lock);

assert(initialized && "node::Isolate::Initialize() hasn't been called");

id_ = ++id;

if (id_ == 1) {

loop_ = uv_default_loop();

} else {

loop_ = uv_loop_new();

}

ngx_queue_init(&at_exit_callbacks_);

ngx_queue_init(&list_member_);

// Add this isolate into the list of all isolates.

ngx_queue_insert_tail(&list_head, &list_member_);

isolate_count++;

uv_mutex_unlock(&list_lock);

v8_isolate_ = v8::Isolate::New();

assert(v8_isolate_->GetData() == NULL);

v8_isolate_->SetData(this);

globals_init_ = false;

}

struct globals* Isolate::Globals() {

return &globals_;

}

void Isolate::AtExit(AtExitCallback callback, void* arg) {

struct AtExitCallbackInfo* it = new AtExitCallbackInfo;

NODE_ISOLATE_CHECK(this);

it->callback_ = callback;

it->arg_ = arg;

ngx_queue_insert_head(&at_exit_callbacks_, &it->at_exit_callbacks_);

}

void Isolate::Enter() {

v8_isolate_->Enter();

if (v8_context_.IsEmpty()) {

v8_context_ = v8::Context::New();

}

v8_context_->Enter();

if (!globals_init_) {

globals_init_ = true;

globals_init(&globals_);

}

NODE_ISOLATE_CHECK(this);

}

void Isolate::Dispose() {

uv_mutex_lock(&list_lock);

NODE_ISOLATE_CHECK(this);

struct AtExitCallbackInfo* it;

ngx_queue_t* q;

assert(v8_context_->InContext());

v8_context_->Exit();

v8_context_.Clear();

v8_context_.Dispose();

v8_isolate_->Exit();

v8_isolate_->Dispose();

v8_isolate_ = NULL;

ngx_queue_remove(&list_member_);

isolate_count--;

assert(isolate_count >= 0);

assert(isolate_count > 0 || ngx_queue_empty(&list_head));

uv_mutex_unlock(&list_lock);

}

static void RunIsolate(void* arg) {

node::Isolate* isolate = reinterpret_cast<node::Isolate*>(arg);

isolate->Enter();

// TODO in the future when v0.6 is dead, move StartThread and related

// handles into node_isolate.cc. It is currently organized like this to

// minimize diff (and thus merge conflicts) between the legacy v0.6

// branch.

StartThread(isolate, isolate->argc_, isolate->argv_);

isolate->Dispose();

delete isolate;

}

static Handle<Value> CreateIsolate(const Arguments& args) {

HandleScope scope;

assert(args[0]->IsArray());

Local<Array> argv = args[0].As<Array>();

assert(argv->Length() >= 2);

// Note that isolate lock is aquired in the constructor here. It will not

// be unlocked until RunIsolate starts and calls isolate->Enter().

Isolate* isolate = new node::Isolate();

// Copy over arguments into isolate

isolate->argc_ = argv->Length();

isolate->argv_ = new char*[isolate->argc_ + 1];

for (int i = 0; i < isolate->argc_; ++i) {

String::Utf8Value str(argv->Get(i));

size_t size = 1 + strlen(*str);

isolate->argv_[i] = new char[size];

memcpy(isolate->argv_[i], *str, size);

}

isolate->argv_[isolate->argc_] = NULL;

if (uv_thread_create(&isolate->tid_, RunIsolate, isolate)) {

delete isolate;

return Null();

}

// TODO instead of ObjectTemplate - have a special wrapper.

Local<ObjectTemplate> tpl = ObjectTemplate::New();

tpl->SetInternalFieldCount(2);

Local<Object> obj = tpl->NewInstance();

obj->SetPointerInInternalField(0, magic_isolate_cookie_);

obj->SetPointerInInternalField(1, isolate);

return scope.Close(obj);

}

static Handle<Value> CountIsolate(const Arguments& args) {

HandleScope scope;

return scope.Close(Integer::New(Isolate::Count()));

}

static Handle<Value> JoinIsolate(const Arguments& args) {

HandleScope scope;

assert(args[0]->IsObject());

Local<Object> obj = args[0]->ToObject();

assert(obj->InternalFieldCount() == 2);

assert(obj->GetPointerFromInternalField(0) == magic_isolate_cookie_);

Isolate* ti = reinterpret_cast<Isolate*>(

obj->GetPointerFromInternalField(1));

if (uv_thread_join(&ti->tid_))

return False(); // error

else

return True(); // ok

}

void InitIsolates(Handle<Object> target) {

HandleScope scope;

NODE_SET_METHOD(target, "create", CreateIsolate);

NODE_SET_METHOD(target, "count", CountIsolate);

NODE_SET_METHOD(target, "join", JoinIsolate);

}

} // namespace node

NODE_MODULE(node_isolates, node::InitIsolates)

node/src/node_isolate.cc at master · cortfr/node · GitHub

Expand file tree

Breadcrumbs

node_isolate.cc

Latest commit

History

Breadcrumbs

node_isolate.cc

File metadata and controls