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default-platform.h
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75 lines (60 loc) · 2.49 KB
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// Copyright 2020 the V8 project 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 INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
#define INCLUDE_CPPGC_DEFAULT_PLATFORM_H_
#include <memory>
#include <vector>
#include "cppgc/platform.h"
#include "libplatform/libplatform.h"
#include "v8config.h" // NOLINT(build/include_directory)
namespace cppgc {
/**
* Platform provided by cppgc. Uses V8's DefaultPlatform provided by
* libplatform internally. Exception: `GetForegroundTaskRunner()`, see below.
*/
class V8_EXPORT DefaultPlatform : public Platform {
public:
/**
* Use this method instead of 'cppgc::InitializeProcess' when using
* 'cppgc::DefaultPlatform'. 'cppgc::DefaultPlatform::InitializeProcess'
* will initialize cppgc and v8 if needed (for non-standalone builds).
*
* \param platform DefaultPlatform instance used to initialize cppgc/v8.
*/
static void InitializeProcess(DefaultPlatform* platform);
using IdleTaskSupport = v8::platform::IdleTaskSupport;
explicit DefaultPlatform(
int thread_pool_size = 0,
IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled,
std::unique_ptr<TracingController> tracing_controller = {})
: v8_platform_(v8::platform::NewDefaultPlatform(
thread_pool_size, idle_task_support,
v8::platform::InProcessStackDumping::kDisabled,
std::move(tracing_controller))) {}
cppgc::PageAllocator* GetPageAllocator() override {
return v8_platform_->GetPageAllocator();
}
double MonotonicallyIncreasingTime() override {
return v8_platform_->MonotonicallyIncreasingTime();
}
std::shared_ptr<cppgc::TaskRunner> GetForegroundTaskRunner() override {
// V8's default platform creates a new task runner when passed the
// `v8::Isolate` pointer the first time. For non-default platforms this will
// require getting the appropriate task runner.
return v8_platform_->GetForegroundTaskRunner(kNoIsolate);
}
std::unique_ptr<cppgc::JobHandle> PostJob(
cppgc::TaskPriority priority,
std::unique_ptr<cppgc::JobTask> job_task) override {
return v8_platform_->PostJob(priority, std::move(job_task));
}
TracingController* GetTracingController() override {
return v8_platform_->GetTracingController();
}
protected:
static constexpr v8::Isolate* kNoIsolate = nullptr;
std::unique_ptr<v8::Platform> v8_platform_;
};
} // namespace cppgc
#endif // INCLUDE_CPPGC_DEFAULT_PLATFORM_H_