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