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 <list>
  21
  22 #include <osl/mutex.hxx>
  23 #include <osl/thread.hxx>
  24 #include <osl/diagnose.h>
  25
  26 #include <rtl/process.h>
  27 #include <rtl/byteseq.hxx>
  28
  29 #include <uno/threadpool.h>
  30
  31 #include "current.hxx"
  32
  33
  34 using namespace ::std;
  35 using namespace ::osl;
  36 using namespace ::cppu;
  37
  38
  39 static inline void createLocalId( sal_Sequence **ppThreadId )
  40 {
  41     rtl_byte_sequence_constructNoDefault( ppThreadId , 4 + 16 );
  42     sal_uInt32 id = osl::Thread::getCurrentIdentifier();
  43     (*ppThreadId)->elements[0] = id & 0xFF;
  44     (*ppThreadId)->elements[1] = (id >> 8) & 0xFF;
  45     (*ppThreadId)->elements[2] = (id >> 16) & 0xFF;
  46     (*ppThreadId)->elements[3] = (id >> 24) & 0xFF;
  47     rtl_getGlobalProcessId( reinterpret_cast<sal_uInt8 *>(&(*ppThreadId)->elements[4]) );
  48 }
  49
  50
  51 extern "C" void SAL_CALL
  52 uno_getIdOfCurrentThread( sal_Sequence **ppThreadId )
  53     SAL_THROW_EXTERN_C()
  54 {
  55     IdContainer * p = getIdContainer();
  56     if( ! p->bInit )
  57     {
  58         // first time, that the thread enters the bridge
  59         createLocalId( ppThreadId );
  60
  61         // TODO
  62         // note : this is a leak !
  63         p->pLocalThreadId = *ppThreadId;
  64         p->pCurrentId = *ppThreadId;
  65         p->nRefCountOfCurrentId = 1;
  66         rtl_byte_sequence_acquire( p->pLocalThreadId );
  67         rtl_byte_sequence_acquire( p->pCurrentId );
  68         p->bInit = true;
  69     }
  70     else
  71     {
  72         p->nRefCountOfCurrentId ++;
  73         if( *ppThreadId )
  74         {
  75             rtl_byte_sequence_release( *ppThreadId );
  76         }
  77         *ppThreadId = p->pCurrentId;
  78         rtl_byte_sequence_acquire( *ppThreadId );
  79     }
  80 }
  81
  82
  83 extern "C" void SAL_CALL uno_releaseIdFromCurrentThread()
  84     SAL_THROW_EXTERN_C()
  85 {
  86     IdContainer *p = getIdContainer();
  87     OSL_ASSERT( p );
  88     OSL_ASSERT( p->nRefCountOfCurrentId );
  89
  90     p->nRefCountOfCurrentId --;
  91     if( ! p->nRefCountOfCurrentId && (p->pLocalThreadId != p->pCurrentId) )
  92     {
  93         rtl_byte_sequence_assign( &(p->pCurrentId) , p->pLocalThreadId );
  94     }
  95 }
  96
  97 extern "C" sal_Bool SAL_CALL uno_bindIdToCurrentThread( sal_Sequence *pThreadId )
  98     SAL_THROW_EXTERN_C()
  99 {
 100     IdContainer *p = getIdContainer();
 101     if( ! p->bInit )
 102     {
 103         p->pLocalThreadId = 0;
 104         createLocalId( &(p->pLocalThreadId) );
 105         p->nRefCountOfCurrentId = 1;
 106         p->pCurrentId = pThreadId;
 107         rtl_byte_sequence_acquire( p->pCurrentId );
 108         p->bInit = true;
 109     }
 110     else
 111     {
 112         OSL_ASSERT( 0 == p->nRefCountOfCurrentId );
 113         if( 0 == p->nRefCountOfCurrentId )
 114         {
 115             rtl_byte_sequence_assign(&( p->pCurrentId ), pThreadId );
 116             p->nRefCountOfCurrentId ++;
 117         }
 118         else
 119         {
 120             return sal_False;
 121         }
 122
 123     }
 124     return sal_True;
 125 }
 126
 127 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */