cppu/source/threadpool/jobqueue.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_cppu.hxx"
  33 #include "jobqueue.hxx"
  34 #include "threadpool.hxx"
  35
  36 #include <osl/diagnose.h>
  37
  38 using namespace ::osl;
  39
  40 namespace cppu_threadpool {
  41
  42     JobQueue::JobQueue() :
  43         m_nToDo( 0 ),
  44         m_bSuspended( sal_False ),
  45         m_cndWait( osl_createCondition() )
  46     {
  47         osl_resetCondition( m_cndWait );
  48     }
  49
  50     JobQueue::~JobQueue()
  51     {
  52         osl_destroyCondition( m_cndWait );
  53     }
  54
  55
  56     void JobQueue::add( void *pThreadSpecificData, RequestFun * doRequest )
  57     {
  58         MutexGuard guard( m_mutex );
  59         Job job = { pThreadSpecificData , doRequest };
  60         m_lstJob.push_back( job );
  61         if( ! m_bSuspended )
  62         {
  63             osl_setCondition( m_cndWait );
  64         }
  65         m_nToDo ++;
  66     }
  67
  68     void *JobQueue::enter( sal_Int64 nDisposeId , sal_Bool bReturnWhenNoJob )
  69     {
  70         void *pReturn = 0;
  71         {
  72             // synchronize with the dispose calls
  73             MutexGuard guard( m_mutex );
  74             if( DisposedCallerAdmin::getInstance()->isDisposed( nDisposeId ) )
  75             {
  76                 return 0;
  77             }
  78             m_lstCallstack.push_front( nDisposeId );
  79         }
  80
  81
  82         while( sal_True )
  83         {
  84             if( bReturnWhenNoJob )
  85             {
  86                 MutexGuard guard( m_mutex );
  87                 if( m_lstJob.empty() )
  88                 {
  89                     break;
  90                 }
  91             }
  92
  93             osl_waitCondition( m_cndWait , 0 );
  94
  95             struct Job job={0,0};
  96             {
  97                 // synchronize with add and dispose calls
  98                 MutexGuard guard( m_mutex );
  99
 100                 if( 0 == m_lstCallstack.front() )
 101                 {
 102                     // disposed !
 103                     break;
 104                 }
 105
 106                 OSL_ASSERT( ! m_lstJob.empty() );
 107                 if( ! m_lstJob.empty() )
 108                 {
 109                     job = m_lstJob.front();
 110                     m_lstJob.pop_front();
 111                 }
 112                 if( m_lstJob.empty() )
 113                 {
 114                     osl_resetCondition( m_cndWait );
 115                 }
 116             }
 117
 118             if( job.doRequest )
 119             {
 120                 job.doRequest( job.pThreadSpecificData );
 121                 m_nToDo --;
 122             }
 123             else
 124             {
 125                 m_nToDo --;
 126                 pReturn = job.pThreadSpecificData;
 127                 break;
 128             }
 129         }
 130
 131         {
 132             // synchronize with the dispose calls
 133             MutexGuard guard( m_mutex );
 134             m_lstCallstack.pop_front();
 135         }
 136
 137         return pReturn;
 138     }
 139
 140     void JobQueue::dispose( sal_Int64 nDisposeId )
 141     {
 142         MutexGuard guard( m_mutex );
 143         for( CallStackList::iterator ii = m_lstCallstack.begin() ;
 144              ii != m_lstCallstack.end() ;
 145              ++ii )
 146         {
 147             if( (*ii) == nDisposeId )
 148             {
 149                 (*ii) = 0;
 150             }
 151         }
 152
 153         if( !m_lstCallstack.empty()  && ! m_lstCallstack.front() )
 154         {
 155             // The thread is waiting for a disposed pCallerId, let it go
 156             osl_setCondition( m_cndWait );
 157         }
 158     }
 159
 160     void JobQueue::suspend()
 161     {
 162         MutexGuard guard( m_mutex );
 163         m_bSuspended = sal_True;
 164     }
 165
 166     void JobQueue::resume()
 167     {
 168         MutexGuard guard( m_mutex );
 169         m_bSuspended = sal_False;
 170         if( ! m_lstJob.empty() )
 171         {
 172             osl_setCondition( m_cndWait );
 173         }
 174     }
 175
 176     sal_Bool JobQueue::isEmpty()
 177     {
 178         MutexGuard guard( m_mutex );
 179         return m_lstJob.empty();
 180     }
 181
 182     sal_Bool JobQueue::isCallstackEmpty()
 183     {
 184         MutexGuard guard( m_mutex );
 185         return m_lstCallstack.empty();
 186     }
 187
 188     sal_Bool JobQueue::isBusy()
 189     {
 190         return m_nToDo > 0;
 191     }
 192
 193
 194 }