node/src/timer_wrap.cc at master · bts/node · GitHub

History

219 lines (160 loc) · 6.02 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

// 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 "handle_wrap.h"

#define UNWRAP \

assert(!args.Holder().IsEmpty()); \

assert(args.Holder()->InternalFieldCount() > 0); \

TimerWrap* wrap = \

static_cast<TimerWrap*>(args.Holder()->GetPointerFromInternalField(0)); \

if (!wrap) { \

uv_err_t err; \

err.code = UV_EBADF; \

SetErrno(err); \

return scope.Close(Integer::New(-1)); \

}

namespace node {

using v8::Object;

using v8::Handle;

using v8::Local;

using v8::Persistent;

using v8::Value;

using v8::HandleScope;

using v8::FunctionTemplate;

using v8::String;

using v8::Function;

using v8::TryCatch;

using v8::Context;

using v8::Arguments;

using v8::Integer;

static Persistent<String> ontimeout_sym;

class TimerWrap : public HandleWrap {

public:

static void Initialize(Handle<Object> target) {

HandleScope scope;

HandleWrap::Initialize(target);

Local<FunctionTemplate> constructor = FunctionTemplate::New(New);

constructor->InstanceTemplate()->SetInternalFieldCount(1);

constructor->SetClassName(String::NewSymbol("Timer"));

NODE_SET_PROTOTYPE_METHOD(constructor, "close", HandleWrap::Close);

NODE_SET_PROTOTYPE_METHOD(constructor, "start", Start);

NODE_SET_PROTOTYPE_METHOD(constructor, "stop", Stop);

NODE_SET_PROTOTYPE_METHOD(constructor, "setRepeat", SetRepeat);

NODE_SET_PROTOTYPE_METHOD(constructor, "getRepeat", GetRepeat);

NODE_SET_PROTOTYPE_METHOD(constructor, "again", Again);

ontimeout_sym = NODE_PSYMBOL("ontimeout");

target->Set(String::NewSymbol("Timer"), constructor->GetFunction());

}

private:

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

// This constructor should not be exposed to public javascript.

// Therefore we assert that we are not trying to call this as a

// normal function.

assert(args.IsConstructCall());

HandleScope scope;

TimerWrap *wrap = new TimerWrap(args.This());

assert(wrap);

return scope.Close(args.This());

}

TimerWrap(Handle<Object> object)

: HandleWrap(object, (uv_handle_t*) &handle_) {

active_ = false;

int r = uv_timer_init(uv_default_loop(), &handle_);

assert(r == 0);

handle_.data = this;

// uv_timer_init adds a loop reference. (That is, it calls uv_ref.) This

// is not the behavior we want in Node. Timers should not increase the

// ref count of the loop except when active.

uv_unref(uv_default_loop());

}

~TimerWrap() {

if (!active_) uv_ref(uv_default_loop());

}

void StateChange() {

bool was_active = active_;

active_ = uv_is_active((uv_handle_t*) &handle_);

if (!was_active && active_) {

// If our state is changing from inactive to active, we

// increase the loop's reference count.

uv_ref(uv_default_loop());

} else if (was_active && !active_) {

// If our state is changing from active to inactive, we

// decrease the loop's reference count.

uv_unref(uv_default_loop());

}

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

HandleScope scope;

UNWRAP

int64_t timeout = args[0]->IntegerValue();

int64_t repeat = args[1]->IntegerValue();

int r = uv_timer_start(&wrap->handle_, OnTimeout, timeout, repeat);

// Error starting the timer.

if (r) SetErrno(uv_last_error(uv_default_loop()));

wrap->StateChange();

return scope.Close(Integer::New(r));

}

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

HandleScope scope;

UNWRAP

int r = uv_timer_stop(&wrap->handle_);

if (r) SetErrno(uv_last_error(uv_default_loop()));

wrap->StateChange();

return scope.Close(Integer::New(r));

}

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

HandleScope scope;

UNWRAP

int r = uv_timer_again(&wrap->handle_);

if (r) SetErrno(uv_last_error(uv_default_loop()));

wrap->StateChange();

return scope.Close(Integer::New(r));

}

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

HandleScope scope;

UNWRAP

int64_t repeat = args[0]->IntegerValue();

uv_timer_set_repeat(&wrap->handle_, repeat);

return scope.Close(Integer::New(0));

}

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

HandleScope scope;

UNWRAP

int64_t repeat = uv_timer_get_repeat(&wrap->handle_);

if (repeat < 0) SetErrno(uv_last_error(uv_default_loop()));

return scope.Close(Integer::New(repeat));

}

static void OnTimeout(uv_timer_t* handle, int status) {

HandleScope scope;

TimerWrap* wrap = static_cast<TimerWrap*>(handle->data);

assert(wrap);

wrap->StateChange();

Local<Value> argv[1] = { Integer::New(status) };

MakeCallback(wrap->object_, ontimeout_sym, ARRAY_SIZE(argv), argv);

}

uv_timer_t handle_;

// This member is set false initially. When the timer is turned

// on uv_ref is called. When the timer is turned off uv_unref is

// called. Used to mirror libev semantics.

bool active_;

};

} // namespace node

NODE_MODULE(node_timer_wrap, node::TimerWrap::Initialize)

node/src/timer_wrap.cc at master · bts/node · GitHub

Expand file tree

Breadcrumbs

timer_wrap.cc

Latest commit

History

Breadcrumbs

timer_wrap.cc

File metadata and controls