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authorGravatar Julien Boeuf <jboeuf@google.com>2015-08-26 11:19:10 -0700
committerGravatar Julien Boeuf <jboeuf@google.com>2015-08-26 11:19:10 -0700
commit5b3516e2c5c3c6878d28cd19db73d5572851e6b9 (patch)
treea34bde8ab374f35f5a6a6a4cdbdf741076dbd3fa /src/cpp/server/dynamic_thread_pool.h
parent9a8d0d3eaf8ccd1c3a6e27f1f8bbeeee85e64345 (diff)
parent1f1919c8cfc61cd9af288cd1585b38b9c3511e1f (diff)
Merge branch 'master' of github.com:grpc/grpc into cpp_auth_md_processor
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+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
+#define GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
+
+#include <list>
+#include <memory>
+#include <queue>
+
+#include <grpc++/impl/sync.h>
+#include <grpc++/impl/thd.h>
+#include <grpc++/support/config.h>
+
+#include "src/cpp/server/thread_pool_interface.h"
+
+namespace grpc {
+
+class DynamicThreadPool GRPC_FINAL : public ThreadPoolInterface {
+ public:
+ explicit DynamicThreadPool(int reserve_threads);
+ ~DynamicThreadPool();
+
+ void Add(const std::function<void()>& callback) GRPC_OVERRIDE;
+
+ private:
+ class DynamicThread {
+ public:
+ DynamicThread(DynamicThreadPool* pool);
+ ~DynamicThread();
+
+ private:
+ DynamicThreadPool* pool_;
+ std::unique_ptr<grpc::thread> thd_;
+ void ThreadFunc();
+ };
+ grpc::mutex mu_;
+ grpc::condition_variable cv_;
+ grpc::condition_variable shutdown_cv_;
+ bool shutdown_;
+ std::queue<std::function<void()>> callbacks_;
+ int reserve_threads_;
+ int nthreads_;
+ int threads_waiting_;
+ std::list<DynamicThread*> dead_threads_;
+
+ void ThreadFunc();
+ static void ReapThreads(std::list<DynamicThread*>* tlist);
+};
+
+} // namespace grpc
+
+#endif // GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H