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f54e066949
* Reduce memory footprint
* Improve connection handling in the RequestManager
* Reduce the number of locking calls
* Reduce the size of the VM pool
123 lines
3.1 KiB
C++
123 lines
3.1 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2018, OpenNebula Project, OpenNebula Systems */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------- */
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#ifndef REQUEST_MANAGER_CONNECTION_H_
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#define REQUEST_MANAGER_CONNECTION_H_
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#include "RequestManager.h"
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/**
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* The connection manager class synchronizes the connection and manager threads
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*/
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class ConnectionManager
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{
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public:
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ConnectionManager(RequestManager *_rm, int mc):rm(_rm), max_connections(mc)
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{
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pthread_mutex_init(&mutex,0);
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pthread_cond_init(&cond,0);
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};
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~ConnectionManager()
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{
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pthread_mutex_destroy(&mutex);
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pthread_cond_destroy(&cond);
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};
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/**
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* Increments number of active connections
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*/
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int add()
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{
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pthread_mutex_lock(&mutex);
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++connections;
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pthread_mutex_unlock(&mutex);
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return connections;
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};
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/**
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* Decrements number of active connections and signals management thread
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*/
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void del()
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{
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pthread_mutex_lock(&mutex);
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--connections;
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pthread_cond_signal(&cond);
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pthread_mutex_unlock(&mutex);
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};
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/**
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* Waits for active connections to be under the max_connection threshold
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*/
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void wait()
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{
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pthread_mutex_lock(&mutex);
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while ( connections >= max_connections )
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{
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pthread_cond_wait(&cond, &mutex);
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}
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pthread_mutex_unlock(&mutex);
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};
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/**
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* Run an xmlrpc connection
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* @param fd connected socket
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*/
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void run_connection(int fd)
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{
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xmlrpc_c::serverAbyss * as = rm->create_abyss();
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as->runConn(fd);
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delete as;
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};
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private:
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/**
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* Synchronization for connection threads and listener thread
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*/
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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/**
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* RequestManager to create an AbyssSever class to handle each request
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*/
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RequestManager * rm;
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/**
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* Number of active connections
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*/
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int connections;
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/**
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* Max number of active connections
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*/
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int max_connections;
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};
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#endif
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