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// 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/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:
V8Platform(const V8Platform&) = delete;
V8Platform& operator=(const V8Platform&) = delete;
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;
int NumberOfWorkerThreads() override;
void CallOnWorkerThread(std::unique_ptr<v8::Task> task) override;
void CallBlockingTaskOnWorkerThread(std::unique_ptr<v8::Task> task) override;
void CallLowPriorityTaskOnWorkerThread(
std::unique_ptr<v8::Task> task) override;
void CallDelayedOnWorkerThread(std::unique_ptr<v8::Task> task,
double delay_in_seconds) override;
std::unique_ptr<v8::JobHandle> PostJob(
v8::TaskPriority priority,
std::unique_ptr<v8::JobTask> job_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_;
};
} // namespace gin
#endif // GIN_PUBLIC_V8_PLATFORM_H_
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