cppu/source/threadpool/thread.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <algorithm>
  23 #include <cstdlib>
  24 #include <osl/diagnose.h>
  25 #include <uno/threadpool.h>
  26 #include <sal/log.hxx>
  27 #include <utility>
  28
  29 #include "thread.hxx"
  30 #include "jobqueue.hxx"
  31 #include "threadpool.hxx"
  32
  33 using namespace osl;
  34 using namespace rtl;
  35
  36 namespace cppu_threadpool {
  37
  38
  39     ThreadAdmin::ThreadAdmin(): m_disposed(false) {}
  40
  41     ThreadAdmin::~ThreadAdmin()
  42     {
  43         SAL_WARN_IF(m_deque.size(), "cppu.threadpool", m_deque.size() << "Threads left");
  44     }
  45
  46     bool ThreadAdmin::add_locked( rtl::Reference< ORequestThread > const & p )
  47     {
  48         if( m_disposed )
  49         {
  50             return false;
  51         }
  52         m_deque.push_back( p );
  53         return true;
  54     }
  55
  56     void ThreadAdmin::remove_locked( rtl::Reference< ORequestThread > const & p )
  57     {
  58         m_deque.erase(std::find( m_deque.begin(), m_deque.end(), p ), m_deque.end());
  59     }
  60
  61     void ThreadAdmin::remove( rtl::Reference< ORequestThread > const & p )
  62     {
  63         std::scoped_lock aGuard( m_mutex );
  64         remove_locked( p );
  65     }
  66
  67     void ThreadAdmin::join()
  68     {
  69         {
  70             std::scoped_lock aGuard( m_mutex );
  71             m_disposed = true;
  72         }
  73         for (;;)
  74         {
  75             rtl::Reference< ORequestThread > pCurrent;
  76             {
  77                 std::scoped_lock aGuard( m_mutex );
  78                 if( m_deque.empty() )
  79                 {
  80                     break;
  81                 }
  82                 pCurrent = m_deque.front();
  83                 m_deque.pop_front();
  84             }
  85             if (pCurrent->getIdentifier()
  86                 != osl::Thread::getCurrentIdentifier())
  87             {
  88                 pCurrent->join();
  89             }
  90         }
  91     }
  92
  93
  94     ORequestThread::ORequestThread( ThreadPoolHolder aThreadPool,
  95                                     JobQueue *pQueue,
  96                                     ByteSequence aThreadId,
  97                                     bool bAsynchron )
  98         : m_aThreadPool(std::move( aThreadPool ))
  99         , m_pQueue( pQueue )
 100         , m_aThreadId(std::move( aThreadId ))
 101         , m_bAsynchron( bAsynchron )
 102     {}
 103
 104     ORequestThread::~ORequestThread() {}
 105
 106     void ORequestThread::setTask( JobQueue *pQueue,
 107                                   const ByteSequence &aThreadId,
 108                                   bool bAsynchron )
 109     {
 110         m_pQueue = pQueue;
 111         m_aThreadId = aThreadId;
 112         m_bAsynchron = bAsynchron;
 113     }
 114
 115     bool ORequestThread::launch()
 116     {
 117         // Assumption is that osl::Thread::create returns normally with a true
 118         // return value iff it causes osl::Thread::run to start executing:
 119         acquire();
 120         ThreadAdmin & rThreadAdmin = m_aThreadPool->getThreadAdmin();
 121         std::unique_lock g(rThreadAdmin.m_mutex);
 122         if (!rThreadAdmin.add_locked( this )) {
 123             return false;
 124         }
 125         try {
 126             if (!create()) {
 127                 std::abort();
 128             }
 129         } catch (...) {
 130             rThreadAdmin.remove_locked( this );
 131             g.release();
 132             release();
 133             throw;
 134         }
 135         return true;
 136     }
 137
 138     void ORequestThread::onTerminated()
 139     {
 140         m_aThreadPool->getThreadAdmin().remove( this );
 141         release();
 142     }
 143
 144     void ORequestThread::run()
 145     {
 146         osl_setThreadName("cppu_threadpool::ORequestThread");
 147
 148         try
 149         {
 150             while ( m_pQueue )
 151             {
 152                 if( ! m_bAsynchron )
 153                 {
 154                     if ( !uno_bindIdToCurrentThread( m_aThreadId.getHandle() ) )
 155                     {
 156                         OSL_ASSERT( false );
 157                     }
 158                 }
 159
 160                 while( ! m_pQueue->isEmpty() )
 161                 {
 162                     // Note : Oneways should not get a disposable disposeid,
 163                     //        It does not make sense to dispose a call in this state.
 164                     //        That's way we put it a disposeid, that can't be used otherwise.
 165                     m_pQueue->enter(
 166                         this,
 167                         true );
 168
 169                     if( m_pQueue->isEmpty() )
 170                     {
 171                         m_aThreadPool->revokeQueue( m_aThreadId , m_bAsynchron );
 172                         // Note : revokeQueue might have failed because m_pQueue.isEmpty()
 173                         //        may be false (race).
 174                     }
 175                 }
 176
 177                 delete m_pQueue;
 178                 m_pQueue = nullptr;
 179
 180                 if( ! m_bAsynchron )
 181                 {
 182                     uno_releaseIdFromCurrentThread();
 183                 }
 184
 185                 m_aThreadPool->waitInPool( this );
 186             }
 187         }
 188         catch (...)
 189         {
 190             // Work around the problem that onTerminated is not called if run
 191             // throws an exception:
 192             onTerminated();
 193             throw;
 194         }
 195     }
 196 }
 197
 198 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */