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