1 // Copyright 2018 The Chromium Authors 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 BASE_ANDROID_TASK_SCHEDULER_TASK_RUNNER_ANDROID_H_ 6 #define BASE_ANDROID_TASK_SCHEDULER_TASK_RUNNER_ANDROID_H_ 7 8 #include <memory> 9 10 #include "base/android/jni_weak_ref.h" 11 #include "base/android/task_scheduler/task_traits_android.h" 12 #include "base/base_export.h" 13 #include "base/functional/callback_forward.h" 14 #include "base/task/single_thread_task_runner.h" 15 16 namespace base { 17 18 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.base.task 19 enum class TaskRunnerType { BASE, SEQUENCED, SINGLE_THREAD }; 20 21 // Native implementation backing TaskRunnerImpl.java which posts java tasks onto 22 // a C++ TaskRunner. 23 class BASE_EXPORT TaskRunnerAndroid { 24 public: 25 explicit TaskRunnerAndroid(scoped_refptr<TaskRunner> task_runner, 26 TaskRunnerType type); 27 28 TaskRunnerAndroid(const TaskRunnerAndroid&) = delete; 29 TaskRunnerAndroid& operator=(const TaskRunnerAndroid&) = delete; 30 31 ~TaskRunnerAndroid(); 32 33 void Destroy(JNIEnv* env); 34 35 void PostDelayedTask(JNIEnv* env, 36 const base::android::JavaRef<jobject>& task, 37 jlong delay, 38 std::string& runnable_class_name); 39 40 bool BelongsToCurrentThread(JNIEnv* env); 41 42 static std::unique_ptr<TaskRunnerAndroid> Create(jint task_runner_type, 43 jint j_task_traits); 44 45 using UiThreadTaskRunnerCallback = 46 RepeatingCallback<scoped_refptr<base::SingleThreadTaskRunner>( 47 ::TaskTraits)>; 48 49 static void SetUiThreadTaskRunnerCallback( 50 UiThreadTaskRunnerCallback callback); 51 52 private: 53 const scoped_refptr<TaskRunner> task_runner_; 54 const TaskRunnerType type_; 55 }; 56 57 } // namespace base 58 59 #endif // BASE_ANDROID_TASK_SCHEDULER_TASK_RUNNER_ANDROID_H_ 60