GRPC C++  1.39.1
dynamic_thread_pool.h
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1 /*
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3  * Copyright 2015 gRPC authors.
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5  * Licensed under the Apache License, Version 2.0 (the "License");
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18 
19 #ifndef GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
20 #define GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
21 
22 #include <list>
23 #include <memory>
24 #include <queue>
25 
26 #include <grpcpp/support/config.h>
27 
29 #include "src/core/lib/gprpp/thd.h"
31 
32 namespace grpc {
33 
34 class DynamicThreadPool final : public ThreadPoolInterface {
35  public:
36  explicit DynamicThreadPool(int reserve_threads);
37  ~DynamicThreadPool() override;
38 
39  void Add(const std::function<void()>& callback) override;
40 
41  private:
42  class DynamicThread {
43  public:
44  explicit DynamicThread(DynamicThreadPool* pool);
45  ~DynamicThread();
46 
47  private:
48  DynamicThreadPool* pool_;
49  grpc_core::Thread thd_;
50  void ThreadFunc();
51  };
52  grpc_core::Mutex mu_;
54  grpc_core::CondVar shutdown_cv_;
55  bool shutdown_;
56  std::queue<std::function<void()>> callbacks_;
57  int reserve_threads_;
58  int nthreads_;
59  int threads_waiting_;
60  std::list<DynamicThread*> dead_threads_;
61 
62  void ThreadFunc();
63  static void ReapThreads(std::list<DynamicThread*>* tlist);
64 };
65 
66 } // namespace grpc
67 
68 #endif // GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
Definition: dynamic_thread_pool.h:34
~DynamicThreadPool() override
Definition: dynamic_thread_pool.cc:97
void Add(const std::function< void()> &callback) override
Definition: dynamic_thread_pool.cc:107
DynamicThreadPool(int reserve_threads)
Definition: dynamic_thread_pool.cc:79
Definition: thread_pool_interface.h:27
Definition: sync.h:123
Definition: sync.h:59
Definition: thd.h:46
An Alarm posts the user-provided tag to its associated completion queue or invokes the user-provided ...
Definition: alarm.h:33