vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2015, Google Inc. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Vijay Pai | e8a7e30 | 2015-08-24 10:52:33 -0700 | [diff] [blame] | 34 | #ifndef GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H |
| 35 | #define GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 36 | |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 37 | #include <list> |
Nicolas "Pixel" Noble | b3d69c3 | 2015-07-29 06:12:51 +0200 | [diff] [blame] | 38 | #include <memory> |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 39 | #include <queue> |
| 40 | |
yang-g | 9d1f0c4 | 2015-08-24 16:08:36 -0700 | [diff] [blame] | 41 | #include <grpc++/impl/sync.h> |
| 42 | #include <grpc++/impl/thd.h> |
| 43 | #include <grpc++/support/config.h> |
| 44 | |
Vijay Pai | e8a7e30 | 2015-08-24 10:52:33 -0700 | [diff] [blame] | 45 | #include "src/cpp/server/thread_pool_interface.h" |
| 46 | |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 47 | namespace grpc { |
| 48 | |
| 49 | class DynamicThreadPool GRPC_FINAL : public ThreadPoolInterface { |
| 50 | public: |
| 51 | explicit DynamicThreadPool(int reserve_threads); |
| 52 | ~DynamicThreadPool(); |
| 53 | |
| 54 | void Add(const std::function<void()>& callback) GRPC_OVERRIDE; |
| 55 | |
| 56 | private: |
| 57 | class DynamicThread { |
Craig Tiller | d6c98df | 2015-08-18 09:33:44 -0700 | [diff] [blame] | 58 | public: |
| 59 | DynamicThread(DynamicThreadPool* pool); |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 60 | ~DynamicThread(); |
Craig Tiller | d6c98df | 2015-08-18 09:33:44 -0700 | [diff] [blame] | 61 | |
| 62 | private: |
| 63 | DynamicThreadPool* pool_; |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 64 | std::unique_ptr<grpc::thread> thd_; |
| 65 | void ThreadFunc(); |
| 66 | }; |
| 67 | grpc::mutex mu_; |
| 68 | grpc::condition_variable cv_; |
vjpai | b76f3ad | 2015-07-23 14:41:23 -0700 | [diff] [blame] | 69 | grpc::condition_variable shutdown_cv_; |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 70 | bool shutdown_; |
| 71 | std::queue<std::function<void()>> callbacks_; |
| 72 | int reserve_threads_; |
| 73 | int nthreads_; |
| 74 | int threads_waiting_; |
vjpai | b28456b | 2015-07-23 14:17:10 -0700 | [diff] [blame] | 75 | std::list<DynamicThread*> dead_threads_; |
| 76 | |
| 77 | void ThreadFunc(); |
| 78 | static void ReapThreads(std::list<DynamicThread*>* tlist); |
| 79 | }; |
| 80 | |
| 81 | } // namespace grpc |
| 82 | |
Vijay Pai | e8a7e30 | 2015-08-24 10:52:33 -0700 | [diff] [blame] | 83 | #endif // GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H |