gin/v8_platform.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gin/public/v8_platform.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/threading/worker_pool.h"
  10 #include "gin/per_isolate_data.h"
  11
  12 namespace gin {
  13
  14 namespace {
  15
  16 base::LazyInstance<V8Platform>::Leaky g_v8_platform = LAZY_INSTANCE_INITIALIZER;
  17
  18 }  // namespace
  19
  20 // static
  21 V8Platform* V8Platform::Get() { return g_v8_platform.Pointer(); }
  22
  23 V8Platform::V8Platform() {}
  24
  25 V8Platform::~V8Platform() {}
  26
  27 void V8Platform::CallOnBackgroundThread(
  28     v8::Task* task,
  29     v8::Platform::ExpectedRuntime expected_runtime) {
  30   base::WorkerPool::PostTask(
  31       FROM_HERE,
  32       base::Bind(&v8::Task::Run, base::Owned(task)),
  33       expected_runtime == v8::Platform::kLongRunningTask);
  34 }
  35
  36 void V8Platform::CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) {
  37   PerIsolateData::From(isolate)->task_runner()->PostTask(
  38       FROM_HERE, base::Bind(&v8::Task::Run, base::Owned(task)));
  39 }
  40
  41 void V8Platform::CallDelayedOnForegroundThread(v8::Isolate* isolate,
  42                                                v8::Task* task,
  43                                                double delay_in_seconds) {
  44   PerIsolateData::From(isolate)->task_runner()->PostDelayedTask(
  45       FROM_HERE, base::Bind(&v8::Task::Run, base::Owned(task)),
  46       base::TimeDelta::FromSecondsD(delay_in_seconds));
  47 }
  48
  49 void V8Platform::CallIdleOnForegroundThread(v8::Isolate* isolate,
  50                                             v8::IdleTask* task) {
  51   DCHECK(PerIsolateData::From(isolate)->idle_task_runner());
  52   PerIsolateData::From(isolate)->idle_task_runner()->PostIdleTask(task);
  53 }
  54
  55 bool V8Platform::IdleTasksEnabled(v8::Isolate* isolate) {
  56   return PerIsolateData::From(isolate)->idle_task_runner() != nullptr;
  57 }
  58
  59 double V8Platform::MonotonicallyIncreasingTime() {
  60   return base::TimeTicks::Now().ToInternalValue() /
  61       static_cast<double>(base::Time::kMicrosecondsPerSecond);
  62 }
  63
  64 }  // namespace gin