threaded_server.cpp
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- /*
- * ===========================================================================
- * PRODUCTION $Log: threaded_server.cpp,v $
- * PRODUCTION Revision 1000.1 2004/06/01 18:45:32 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R6.11
- * PRODUCTION
- * ===========================================================================
- */
- /* $Id: threaded_server.cpp,v 1000.1 2004/06/01 18:45:32 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Author: Aaron Ucko
- *
- * File Description:
- * Framework for a multithreaded network server
- */
- #include <ncbi_pch.hpp>
- #include <connect/threaded_server.hpp>
- #include <connect/ncbi_socket.hpp>
- #include <util/thread_pool.hpp>
- BEGIN_NCBI_SCOPE
- class CSocketRequest : public CStdRequest
- {
- public:
- CSocketRequest(CThreadedServer& server, SOCK sock)
- : m_Server(server), m_Sock(sock) {}
- virtual void Process(void)
- { m_Server.Process(m_Sock); }
- private:
- CThreadedServer& m_Server;
- SOCK m_Sock;
- };
- void CThreadedServer::Run(void)
- {
- SetParams();
- if (m_InitThreads <= 0 || m_MaxThreads < m_InitThreads
- || m_MaxThreads > 1000 || m_Port > 65535) {
- NCBI_THROW(CThreadedServerException, eBadParameters,
- "CThreadedServer::Run: Bad parameters");
- }
- CStdPoolOfThreads pool(m_MaxThreads, m_QueueSize, m_SpawnThreshold);
- pool.Spawn(m_InitThreads);
- CListeningSocket lsock(m_Port);
- if (lsock.GetStatus() != eIO_Success) {
- NCBI_THROW(CThreadedServerException, eCouldntListen,
- "CThreadedServer::Run: Unable to create listening socket: "
- + string(strerror(errno)));
- }
- for (;;) {
- CSocket sock;
- EIO_Status status = lsock.Accept(sock);
- sock.SetOwnership(eNoOwnership); // Process[Overflow] will close it
- if (status == eIO_Success) {
- try {
- pool.AcceptRequest
- (CRef<ncbi::CStdRequest>
- (new CSocketRequest(*this, sock.GetSOCK())));
- if (pool.IsFull() && m_TemporarilyStopListening) {
- lsock.Close();
- pool.WaitForRoom();
- lsock.Listen(m_Port);
- }
- } catch (CBlockingQueueException) {
- _ASSERT(!m_TemporarilyStopListening);
- ProcessOverflow(sock.GetSOCK());
- }
- } else {
- ERR_POST("accept failed: " << IO_StatusStr(status));
- }
- }
- }
- END_NCBI_SCOPE
- /*
- * ===========================================================================
- *
- * $Log: threaded_server.cpp,v $
- * Revision 1000.1 2004/06/01 18:45:32 gouriano
- * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R6.11
- *
- * Revision 6.11 2004/05/17 20:58:13 gorelenk
- * Added include of PCH ncbi_pch.hpp
- *
- * Revision 6.10 2003/08/12 19:28:11 ucko
- * Throw CThreadedServerException for abnormal exits.
- *
- * Revision 6.9 2002/11/04 21:29:02 grichenk
- * Fixed usage of const CRef<> and CRef<> constructor
- *
- * Revision 6.8 2002/09/17 18:42:30 ucko
- * Use CSocket now that SetOwnership exists.
- *
- * Revision 6.7 2002/09/13 17:13:27 ucko
- * Use CListeningSocket instead of LSOCK, but stick with SOCK to avoid
- * double closes.
- *
- * Revision 6.6 2002/09/13 15:16:25 ucko
- * Update for new CBlockingQueue exception setup.
- *
- * Revision 6.5 2002/08/20 19:23:44 ucko
- * Check return status from LSOCK_Create() in CThreadedServer::Run().
- * Move CVS log to end of file.
- *
- * Revision 6.4 2002/01/25 15:39:29 ucko
- * Completely reorganized threaded servers.
- *
- * Revision 6.3 2002/01/24 20:19:18 ucko
- * Add magic TemporarilyStopListening overflow processor
- * More cleanups
- *
- * Revision 6.2 2002/01/24 18:35:56 ucko
- * Allow custom queue-overflow handling.
- * Clean up SOCKs and CONNs when done with them.
- *
- * Revision 6.1 2001/12/11 19:55:22 ucko
- * Introduce thread-pool-based servers.
- *
- * ===========================================================================
- */