Update Files

v8/include/cppgc/default-platform.h

@@ -0,0 +1,67 @@
+// 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 "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:
+  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();
+  }
+
+  v8::Platform* GetV8Platform() const { return v8_platform_.get(); }
+
+ protected:
+  static constexpr v8::Isolate* kNoIsolate = nullptr;
+
+  std::unique_ptr<v8::Platform> v8_platform_;
+};
+
+}  // namespace cppgc
+
+#endif  // INCLUDE_CPPGC_DEFAULT_PLATFORM_H_