cppu/source/threadpool/thread.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   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
  28 #include "thread.hxx"
  29 #include "jobqueue.hxx"
  30 #include "threadpool.hxx"
  31
  32 using namespace osl;
  33 using namespace rtl;
  34
  35 namespace cppu_threadpool {
  36
  37
  38     ThreadAdmin::ThreadAdmin(): m_disposed(false) {}
  39
  40     ThreadAdmin::~ThreadAdmin()
  41     {
  42         SAL_WARN_IF(m_deque.size(), "cppu.threadpool", m_deque.size() << "Threads left");
  43     }
  44
  45     bool ThreadAdmin::add_locked( rtl::Reference< ORequestThread > const & p )
  46     {
  47         if( m_disposed )
  48         {
  49             return false;
  50         }
  51         m_deque.push_back( p );
  52         return true;
  53     }
  54
  55     void ThreadAdmin::remove_locked( rtl::Reference< ORequestThread > const & p )
  56     {
  57         m_deque.erase(std::find( m_deque.begin(), m_deque.end(), p ), m_deque.end());
  58     }
  59
  60     void ThreadAdmin::remove( rtl::Reference< ORequestThread > const & p )
  61     {
  62         std::scoped_lock aGuard( m_mutex );
  63         remove_locked( p );
  64     }
  65
  66     void ThreadAdmin::join()
  67     {
  68         {
  69             std::scoped_lock aGuard( m_mutex );
  70             m_disposed = true;
  71         }
  72         for (;;)
  73         {
  74             rtl::Reference< ORequestThread > pCurrent;
  75             {
  76                 std::scoped_lock aGuard( m_mutex );
  77                 if( m_deque.empty() )
  78                 {
  79                     break;
  80                 }
  81                 pCurrent = m_deque.front();
  82                 m_deque.pop_front();
  83             }
  84             if (pCurrent->getIdentifier()
  85                 != osl::Thread::getCurrentIdentifier())
  86             {
  87                 pCurrent->join();
  88             }
  89         }
  90     }
  91
  92
  93     ORequestThread::ORequestThread( ThreadPoolHolder const &aThreadPool,
  94                                     JobQueue *pQueue,
  95                                     const ByteSequence &aThreadId,
  96                                     bool bAsynchron )
  97         : m_aThreadPool( aThreadPool )
  98         , m_pQueue( pQueue )
  99         , m_aThreadId( aThreadId )
 100         , m_bAsynchron( bAsynchron )
 101     {}
 102
 103     ORequestThread::~ORequestThread() {}
 104
 105     void ORequestThread::setTask( JobQueue *pQueue,
 106                                   const ByteSequence &aThreadId,
 107                                   bool bAsynchron )
 108     {
 109         m_pQueue = pQueue;
 110         m_aThreadId = aThreadId;
 111         m_bAsynchron = bAsynchron;
 112     }
 113
 114     bool ORequestThread::launch()
 115     {
 116         // Assumption is that osl::Thread::create returns normally with a true
 117         // return value iff it causes osl::Thread::run to start executing:
 118         acquire();
 119         ThreadAdmin & rThreadAdmin = m_aThreadPool->getThreadAdmin();
 120         std::unique_lock g(rThreadAdmin.m_mutex);
 121         if (!rThreadAdmin.add_locked( this )) {
 122             return false;
 123         }
 124         try {
 125             if (!create()) {
 126                 std::abort();
 127             }
 128         } catch (...) {
 129             rThreadAdmin.remove_locked( this );
 130             g.release();
 131             release();
 132             throw;
 133         }
 134         return true;
 135     }
 136
 137     void ORequestThread::onTerminated()
 138     {
 139         m_aThreadPool->getThreadAdmin().remove( this );
 140         release();
 141     }
 142
 143     void ORequestThread::run()
 144     {
 145         osl_setThreadName("cppu_threadpool::ORequestThread");
 146
 147         try
 148         {
 149             while ( m_pQueue )
 150             {
 151                 if( ! m_bAsynchron )
 152                 {
 153                     if ( !uno_bindIdToCurrentThread( m_aThreadId.getHandle() ) )
 154                     {
 155                         OSL_ASSERT( false );
 156                     }
 157                 }
 158
 159                 while( ! m_pQueue->isEmpty() )
 160                 {
 161                     // Note : Oneways should not get a disposable disposeid,
 162                     //        It does not make sense to dispose a call in this state.
 163                     //        That's way we put it a disposeid, that can't be used otherwise.
 164                     m_pQueue->enter(
 165                         this,
 166                         true );
 167
 168                     if( m_pQueue->isEmpty() )
 169                     {
 170                         m_aThreadPool->revokeQueue( m_aThreadId , m_bAsynchron );
 171                         // Note : revokeQueue might have failed because m_pQueue.isEmpty()
 172                         //        may be false (race).
 173                     }
 174                 }
 175
 176                 delete m_pQueue;
 177                 m_pQueue = nullptr;
 178
 179                 if( ! m_bAsynchron )
 180                 {
 181                     uno_releaseIdFromCurrentThread();
 182                 }
 183
 184                 m_aThreadPool->waitInPool( this );
 185             }
 186         }
 187         catch (...)
 188         {
 189             // Work around the problem that onTerminated is not called if run
 190             // throws an exception:
 191             onTerminated();
 192             throw;
 193         }
 194     }
 195 }
 196
 197 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */