1 // Copyright 2020 the V8 project 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 #ifndef INCLUDE_CPPGC_DEFAULT_PLATFORM_H_ 6 #define INCLUDE_CPPGC_DEFAULT_PLATFORM_H_ 7 8 #include <memory> 9 10 #include "cppgc/platform.h" 11 #include "libplatform/libplatform.h" 12 #include "v8config.h" // NOLINT(build/include_directory) 13 14 namespace cppgc { 15 16 /** 17 * Platform provided by cppgc. Uses V8's DefaultPlatform provided by 18 * libplatform internally. Exception: `GetForegroundTaskRunner()`, see below. 19 */ 20 class V8_EXPORT DefaultPlatform : public Platform { 21 public: 22 using IdleTaskSupport = v8::platform::IdleTaskSupport; 23 explicit DefaultPlatform( 24 int thread_pool_size = 0, 25 IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled, 26 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)))27 : v8_platform_(v8::platform::NewDefaultPlatform( 28 thread_pool_size, idle_task_support, 29 v8::platform::InProcessStackDumping::kDisabled, 30 std::move(tracing_controller))) {} 31 GetPageAllocator()32 cppgc::PageAllocator* GetPageAllocator() override { 33 return v8_platform_->GetPageAllocator(); 34 } 35 MonotonicallyIncreasingTime()36 double MonotonicallyIncreasingTime() override { 37 return v8_platform_->MonotonicallyIncreasingTime(); 38 } 39 GetForegroundTaskRunner()40 std::shared_ptr<cppgc::TaskRunner> GetForegroundTaskRunner() override { 41 // V8's default platform creates a new task runner when passed the 42 // `v8::Isolate` pointer the first time. For non-default platforms this will 43 // require getting the appropriate task runner. 44 return v8_platform_->GetForegroundTaskRunner(kNoIsolate); 45 } 46 PostJob(cppgc::TaskPriority priority,std::unique_ptr<cppgc::JobTask> job_task)47 std::unique_ptr<cppgc::JobHandle> PostJob( 48 cppgc::TaskPriority priority, 49 std::unique_ptr<cppgc::JobTask> job_task) override { 50 return v8_platform_->PostJob(priority, std::move(job_task)); 51 } 52 GetTracingController()53 TracingController* GetTracingController() override { 54 return v8_platform_->GetTracingController(); 55 } 56 GetV8Platform()57 v8::Platform* GetV8Platform() const { return v8_platform_.get(); } 58 59 protected: 60 static constexpr v8::Isolate* kNoIsolate = nullptr; 61 62 std::unique_ptr<v8::Platform> v8_platform_; 63 }; 64 65 } // namespace cppgc 66 67 #endif // INCLUDE_CPPGC_DEFAULT_PLATFORM_H_ 68