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- /*
- * Copyright 2015-present Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #pragma once
- #include <cstdint>
- namespace folly {
- /**
- * Observes the execution of a task.
- */
- class ExecutionObserver {
- public:
- virtual ~ExecutionObserver() {}
- /**
- * Called when a task is about to start executing.
- *
- * @param id Unique id for the task which is starting.
- */
- virtual void starting(uintptr_t id) noexcept = 0;
- /**
- * Called when a task is ready to run.
- *
- * @param id Unique id for the task which is ready to run.
- */
- virtual void runnable(uintptr_t id) noexcept = 0;
- /**
- * Called just after a task stops executing.
- *
- * @param id Unique id for the task which stopped.
- */
- virtual void stopped(uintptr_t id) noexcept = 0;
- };
- } // namespace folly
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