• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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