electron/common/api/atom_api_idle_gc.cc
2013-04-25 19:41:23 +08:00

80 lines
2 KiB
C++

// Copyright (c) 2013 GitHub, Inc. All rights reserved.
// Copyright (c) 2012, Ben Noordhuis <info@bnoordhuis.nl>.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "vendor/node/src/node.h"
namespace {
using v8::Arguments;
using v8::FunctionTemplate;
using v8::Handle;
using v8::HandleScope;
using v8::Object;
using v8::String;
using v8::Undefined;
using v8::V8;
using v8::Value;
typedef enum { STOP, RUN, PAUSE } gc_state_t;
int64_t interval;
gc_state_t state;
gc_state_t prev_state;
uv_timer_t timer_handle;
uv_check_t check_handle;
uv_prepare_t prepare_handle;
void Timer(uv_timer_t*, int) {
if (V8::IdleNotification()) state = PAUSE;
}
void Check(uv_check_t*, int) {
prev_state = state;
}
void Prepare(uv_prepare_t*, int) {
if (state == PAUSE && prev_state == PAUSE) state = RUN;
if (state == RUN) uv_timer_start(&timer_handle, Timer, interval, 0);
}
Handle<Value> Stop(const Arguments& args) {
state = STOP;
uv_timer_stop(&timer_handle);
uv_check_stop(&check_handle);
uv_prepare_stop(&prepare_handle);
return Undefined();
}
Handle<Value> Start(const Arguments& args) {
HandleScope scope;
Stop(args);
interval = args[0]->IsNumber() ? args[0]->IntegerValue() : 0;
if (interval <= 0) interval = 5000; // Default to 5 seconds.
state = RUN;
uv_check_start(&check_handle, Check);
uv_prepare_start(&prepare_handle, Prepare);
return Undefined();
}
void Init(Handle<Object> obj) {
HandleScope scope;
uv_timer_init(uv_default_loop(), &timer_handle);
uv_check_init(uv_default_loop(), &check_handle);
uv_prepare_init(uv_default_loop(), &prepare_handle);
uv_unref(reinterpret_cast<uv_handle_t*>(&timer_handle));
uv_unref(reinterpret_cast<uv_handle_t*>(&check_handle));
uv_unref(reinterpret_cast<uv_handle_t*>(&prepare_handle));
obj->Set(String::New("stop"), FunctionTemplate::New(Stop)->GetFunction());
obj->Set(String::New("start"), FunctionTemplate::New(Start)->GetFunction());
}
NODE_MODULE(atom_common_idle_gc, Init)
} // namespace