node/src/node_stat_watcher.cc at master · lightwave/node · GitHub

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// 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_stat_watcher.h>

#include <assert.h>

#include <string.h>

#include <stdlib.h>

namespace node {

using namespace v8;

Persistent<FunctionTemplate> StatWatcher::constructor_template;

static Persistent<String> change_symbol;

static Persistent<String> stop_symbol;

void StatWatcher::Initialize(Handle<Object> target) {

HandleScope scope;

Local<FunctionTemplate> t = FunctionTemplate::New(StatWatcher::New);

constructor_template = Persistent<FunctionTemplate>::New(t);

constructor_template->Inherit(EventEmitter::constructor_template);

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

constructor_template->SetClassName(String::NewSymbol("StatWatcher"));

change_symbol = NODE_PSYMBOL("change");

stop_symbol = NODE_PSYMBOL("stop");

NODE_SET_PROTOTYPE_METHOD(constructor_template, "start", StatWatcher::Start);

NODE_SET_PROTOTYPE_METHOD(constructor_template, "stop", StatWatcher::Stop);

target->Set(String::NewSymbol("StatWatcher"), constructor_template->GetFunction());

}

void StatWatcher::Callback(EV_P_ ev_stat *watcher, int revents) {

assert(revents == EV_STAT);

StatWatcher *handler = static_cast<StatWatcher*>(watcher->data);

assert(watcher == &handler->watcher_);

HandleScope scope;

Handle<Value> argv[2];

argv[0] = Handle<Value>(BuildStatsObject(&watcher->attr));

argv[1] = Handle<Value>(BuildStatsObject(&watcher->prev));

handler->Emit(change_symbol, 2, argv);

}

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

if (!args.IsConstructCall()) {

return FromConstructorTemplate(constructor_template, args);

}

HandleScope scope;

StatWatcher *s = new StatWatcher();

s->Wrap(args.Holder());

return args.This();

}

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

HandleScope scope;

if (args.Length() < 1 || !args[0]->IsString()) {

return ThrowException(Exception::TypeError(String::New("Bad arguments")));

}

StatWatcher *handler = ObjectWrap::Unwrap<StatWatcher>(args.Holder());

String::Utf8Value path(args[0]->ToString());

assert(handler->path_ == NULL);

handler->path_ = strdup(*path);

ev_tstamp interval = 0.;

if (args[2]->IsInt32()) {

interval = NODE_V8_UNIXTIME(args[2]);

}

ev_stat_set(&handler->watcher_, handler->path_, interval);

ev_stat_start(EV_DEFAULT_UC_ &handler->watcher_);

handler->persistent_ = args[1]->IsTrue();

if (!handler->persistent_) {

ev_unref(EV_DEFAULT_UC);

}

handler->Ref();

return Undefined();

}

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

HandleScope scope;

StatWatcher *handler = ObjectWrap::Unwrap<StatWatcher>(args.Holder());

handler->Emit(stop_symbol, 0, NULL);

handler->Stop();

return Undefined();

}

void StatWatcher::Stop () {

if (watcher_.active) {

if (!persistent_) ev_ref(EV_DEFAULT_UC);

ev_stat_stop(EV_DEFAULT_UC_ &watcher_);

free(path_);

path_ = NULL;

Unref();

}

} // namespace node

node/src/node_stat_watcher.cc at master · lightwave/node · GitHub

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