cppu/source/threadpool/threadident.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.
   4  *
   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
  22 #include <list>
  23
  24 #include <osl/mutex.hxx>
  25 #include <osl/thread.h>
  26 #include <osl/diagnose.h>
  27
  28 #include <rtl/process.h>
  29 #include <rtl/byteseq.hxx>
  30
  31 #include <uno/threadpool.h>
  32
  33 #include "current.hxx"
  34
  35
  36 using namespace ::std;
  37 using namespace ::osl;
  38 using namespace ::rtl;
  39 using namespace ::cppu;
  40
  41
  42 static inline void createLocalId( sal_Sequence **ppThreadId )
  43 {
  44     rtl_byte_sequence_constructNoDefault( ppThreadId , 4 + 16 );
  45     sal_uInt32 id = osl_getThreadIdentifier(0);
  46     (*ppThreadId)->elements[0] = id & 0xFF;
  47     (*ppThreadId)->elements[1] = (id >> 8) & 0xFF;
  48     (*ppThreadId)->elements[2] = (id >> 16) & 0xFF;
  49     (*ppThreadId)->elements[3] = (id >> 24) & 0xFF;
  50     rtl_getGlobalProcessId( (sal_uInt8 * ) &( (*ppThreadId)->elements[4]) );
  51 }
  52
  53
  54 extern "C" void SAL_CALL
  55 uno_getIdOfCurrentThread( sal_Sequence **ppThreadId )
  56     SAL_THROW_EXTERN_C()
  57 {
  58     IdContainer * p = getIdContainer();
  59     if( ! p->bInit )
  60     {
  61         // first time, that the thread enters the bridge
  62         createLocalId( ppThreadId );
  63
  64         // TODO
  65         // note : this is a leak !
  66         p->pLocalThreadId = *ppThreadId;
  67         p->pCurrentId = *ppThreadId;
  68         p->nRefCountOfCurrentId = 1;
  69         rtl_byte_sequence_acquire( p->pLocalThreadId );
  70         rtl_byte_sequence_acquire( p->pCurrentId );
  71         p->bInit = sal_True;
  72     }
  73     else
  74     {
  75         p->nRefCountOfCurrentId ++;
  76         if( *ppThreadId )
  77         {
  78             rtl_byte_sequence_release( *ppThreadId );
  79         }
  80         *ppThreadId = p->pCurrentId;
  81         rtl_byte_sequence_acquire( *ppThreadId );
  82     }
  83 }
  84
  85
  86 extern "C" void SAL_CALL uno_releaseIdFromCurrentThread()
  87     SAL_THROW_EXTERN_C()
  88 {
  89     IdContainer *p = getIdContainer();
  90     OSL_ASSERT( p );
  91     OSL_ASSERT( p->nRefCountOfCurrentId );
  92
  93     p->nRefCountOfCurrentId --;
  94     if( ! p->nRefCountOfCurrentId && (p->pLocalThreadId != p->pCurrentId) )
  95     {
  96         rtl_byte_sequence_assign( &(p->pCurrentId) , p->pLocalThreadId );
  97     }
  98 }
  99
 100 extern "C" sal_Bool SAL_CALL uno_bindIdToCurrentThread( sal_Sequence *pThreadId )
 101     SAL_THROW_EXTERN_C()
 102 {
 103     IdContainer *p = getIdContainer();
 104     if( ! p->bInit )
 105     {
 106         p->pLocalThreadId = 0;
 107         createLocalId( &(p->pLocalThreadId) );
 108         p->nRefCountOfCurrentId = 1;
 109         p->pCurrentId = pThreadId;
 110         rtl_byte_sequence_acquire( p->pCurrentId );
 111         p->bInit = sal_True;
 112     }
 113     else
 114     {
 115         OSL_ASSERT( 0 == p->nRefCountOfCurrentId );
 116         if( 0 == p->nRefCountOfCurrentId )
 117         {
 118             rtl_byte_sequence_assign(&( p->pCurrentId ), pThreadId );
 119             p->nRefCountOfCurrentId ++;
 120         }
 121         else
 122         {
 123             return sal_False;
 124         }
 125
 126     }
 127     return sal_True;
 128 }
 129
 130 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */