blob: 0429d028b6a300116a67235e8b8b11dca129133e [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GIN_PUBLIC_V8_PLATFORM_H_
#define GIN_PUBLIC_V8_PLATFORM_H_
#include "base/compiler_specific.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/partition_alloc_buildflags.h"
#include "gin/gin_export.h"
#include "v8/include/v8-platform.h"
namespace gin {
// A v8::Platform implementation to use with gin.
class GIN_EXPORT V8Platform : public v8::Platform {
public:
static V8Platform* Get();
// v8::Platform implementation.
// Some configurations do not use page_allocator.
#if BUILDFLAG(USE_PARTITION_ALLOC)
v8::PageAllocator* GetPageAllocator() override;
void OnCriticalMemoryPressure() override;
#endif
std::shared_ptr<v8::TaskRunner> GetForegroundTaskRunner(
v8::Isolate*) override;
std::shared_ptr<v8::TaskRunner> GetBackgroundTaskRunner(
v8::Isolate*) override;
size_t NumberOfAvailableBackgroundThreads() override;
void CallOnBackgroundThread(
v8::Task* task,
v8::Platform::ExpectedRuntime expected_runtime) override;
void CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) override;
void CallDelayedOnForegroundThread(v8::Isolate* isolate,
v8::Task* task,
double delay_in_seconds) override;
void CallIdleOnForegroundThread(v8::Isolate* isolate,
v8::IdleTask* task) override;
bool IdleTasksEnabled(v8::Isolate* isolate) override;
double MonotonicallyIncreasingTime() override;
double CurrentClockTimeMillis() override;
StackTracePrinter GetStackTracePrinter() override;
v8::TracingController* GetTracingController() override;
private:
friend struct base::LazyInstanceTraitsBase<V8Platform>;
V8Platform();
~V8Platform() override;
class TracingControllerImpl;
std::unique_ptr<TracingControllerImpl> tracing_controller_;
DISALLOW_COPY_AND_ASSIGN(V8Platform);
};
} // namespace gin
#endif // GIN_PUBLIC_V8_PLATFORM_H_