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 <stdio.h>
  21 #include <osl/diagnose.h>
  22 #include <uno/threadpool.h>
  23
  24 #include <com/sun/star/lang/DisposedException.hpp>
  25 #include <com/sun/star/uno/Reference.hxx>
  26 #include <com/sun/star/uno/XInterface.hpp>
  27 #include <rtl/ustring.h>
  28 #include <rtl/ustring.hxx>
  29
  30 #include "thread.hxx"
  31 #include "jobqueue.hxx"
  32 #include "threadpool.hxx"
  33
  34 using namespace osl;
  35
  36 namespace cppu_threadpool {
  37
  38 // ----------------------------------------------------------------------------------
  39     ThreadAdmin::ThreadAdmin(): m_disposed(false) {}
  40
  41     ThreadAdmin::~ThreadAdmin()
  42     {
  43 #if OSL_DEBUG_LEVEL > 1
  44         if( m_lst.size() )
  45         {
  46             fprintf( stderr, "%lu Threads left\n" , static_cast<unsigned long>(m_lst.size()) );
  47         }
  48 #endif
  49     }
  50
  51     void ThreadAdmin::add( rtl::Reference< ORequestThread > const & p )
  52     {
  53         MutexGuard aGuard( m_mutex );
  54         if( m_disposed )
  55         {
  56             throw css::lang::DisposedException(
  57                 rtl::OUString(
  58                         "cppu_threadpool::ORequestThread created after"
  59                         " cppu_threadpool::ThreadAdmin has been disposed"),
  60                 css::uno::Reference< css::uno::XInterface >());
  61         }
  62         m_lst.push_back( p );
  63     }
  64
  65     void ThreadAdmin::remove_locked( rtl::Reference< ORequestThread > const & p )
  66     {
  67         ::std::list< rtl::Reference< ORequestThread > >::iterator ii = ::std::find( m_lst.begin(), m_lst.end(), p );
  68         if( ii != m_lst.end() )
  69         {
  70             m_lst.erase( ii );
  71         }
  72     }
  73
  74     void ThreadAdmin::remove( rtl::Reference< ORequestThread > const & p )
  75     {
  76         MutexGuard aGuard( m_mutex );
  77         remove_locked( p );
  78     }
  79
  80     void ThreadAdmin::join()
  81     {
  82         {
  83             MutexGuard aGuard( m_mutex );
  84             m_disposed = true;
  85         }
  86         for (;;)
  87         {
  88             rtl::Reference< ORequestThread > pCurrent;
  89             {
  90                 MutexGuard aGuard( m_mutex );
  91                 if( m_lst.empty() )
  92                 {
  93                     break;
  94                 }
  95                 pCurrent = m_lst.front();
  96                 m_lst.pop_front();
  97             }
  98             pCurrent->join();
  99         }
 100     }
 101
 102 // ----------------------------------------------------------------------------------
 103     ORequestThread::ORequestThread( ThreadPoolHolder const &aThreadPool,
 104                                     JobQueue *pQueue,
 105                                     const ByteSequence &aThreadId,
 106                                     sal_Bool bAsynchron )
 107         : m_aThreadPool( aThreadPool )
 108         , m_pQueue( pQueue )
 109         , m_aThreadId( aThreadId )
 110         , m_bAsynchron( bAsynchron )
 111     {}
 112
 113     ORequestThread::~ORequestThread() {}
 114
 115     void ORequestThread::setTask( JobQueue *pQueue,
 116                                   const ByteSequence &aThreadId,
 117                                   sal_Bool bAsynchron )
 118     {
 119         m_pQueue = pQueue;
 120         m_aThreadId = aThreadId;
 121         m_bAsynchron = bAsynchron;
 122     }
 123
 124     void ORequestThread::launch()
 125     {
 126         // Assumption is that osl::Thread::create returns normally with a true
 127         // return value iff it causes osl::Thread::run to start executing:
 128         acquire();
 129         ThreadAdmin & rThreadAdmin = m_aThreadPool->getThreadAdmin();
 130         osl::ClearableMutexGuard g(rThreadAdmin.m_mutex);
 131         rThreadAdmin.add( this );
 132         try {
 133             if (!create()) {
 134                 throw std::runtime_error("osl::Thread::create failed");
 135             }
 136         } catch (...) {
 137             rThreadAdmin.remove_locked( this );
 138             g.clear();
 139             release();
 140             throw;
 141         }
 142     }
 143
 144     void ORequestThread::onTerminated()
 145     {
 146         m_aThreadPool->getThreadAdmin().remove( this );
 147         release();
 148     }
 149
 150     void ORequestThread::run()
 151     {
 152         try
 153         {
 154             while ( m_pQueue )
 155             {
 156                 if( ! m_bAsynchron )
 157                 {
 158                     if ( !uno_bindIdToCurrentThread( m_aThreadId.getHandle() ) )
 159                     {
 160                         OSL_ASSERT( false );
 161                     }
 162                 }
 163
 164                 while( ! m_pQueue->isEmpty() )
 165                 {
 166                     // Note : Oneways should not get a disposable disposeid,
 167                     //        It does not make sense to dispose a call in this state.
 168                     //        That's way we put it an disposeid, that can't be used otherwise.
 169                     m_pQueue->enter(
 170                         sal::static_int_cast< sal_Int64 >(
 171                             reinterpret_cast< sal_IntPtr >(this)),
 172                         sal_True );
 173
 174                     if( m_pQueue->isEmpty() )
 175                     {
 176                         m_aThreadPool->revokeQueue( m_aThreadId , m_bAsynchron );
 177                         // Note : revokeQueue might have failed because m_pQueue.isEmpty()
 178                         //        may be false (race).
 179                     }
 180                 }
 181
 182                 delete m_pQueue;
 183                 m_pQueue = 0;
 184
 185                 if( ! m_bAsynchron )
 186                 {
 187                     uno_releaseIdFromCurrentThread();
 188                 }
 189
 190                 m_aThreadPool->waitInPool( this );
 191             }
 192         }
 193         catch (...)
 194         {
 195             // Work around the problem that onTerminated is not called if run
 196             // throws an exception:
 197             onTerminated();
 198             throw;
 199         }
 200     }
 201 }
 202
 203 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */