Quelle threadident.cxx Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
*   Licensed to the Apache Software Foundation (ASF) under one or more
*   contributor license agreements. See the NOTICE file distributed
*   with this work for additional information regarding copyright
*   ownership. The ASF licenses this file to you under the Apache
*   License, Version 2.0 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/

#include <osl/thread.hxx>
#include <osl/diagnose.h>

#include <rtl/process.h>
#include <rtl/byteseq.hxx>

#include <uno/threadpool.h>

#include "current.hxx"

using namespace ::osl;
using namespace ::cppu;

static void createLocalId( sal_Sequence **ppThreadId )
{
    rtl_byte_sequence_constructNoDefault( ppThreadId , 4 + 16 );
    sal_uInt32 id = osl::Thread::getCurrentIdentifier();
    (*ppThreadId)->elements[0] = id & 0xFF;
    (*ppThreadId)->elements[1] = (id >> 8) & 0xFF;
    (*ppThreadId)->elements[2] = (id >> 16) & 0xFF;
    (*ppThreadId)->elements[3] = (id >> 24) & 0xFF;
    rtl_getGlobalProcessId( reinterpret_cast<sal_uInt8 *>(&(*ppThreadId)->elements[4]) );
}

extern "C" void SAL_CALL
uno_getIdOfCurrentThread( sal_Sequence **ppThreadId ) noexcept
{
    IdContainer& id = getIdContainer();
    if (!id.bInit)
    {
        // first time, that the thread enters the bridge
        createLocalId( ppThreadId );

        // TODO
        // note : this is a leak !
        id.pLocalThreadId = *ppThreadId;
        id.pCurrentId = *ppThreadId;
        id.nRefCountOfCurrentId = 1;
        rtl_byte_sequence_acquire( id.pLocalThreadId );
        rtl_byte_sequence_acquire( id.pCurrentId );
        id.bInit = true;
    }
    else
    {
        id.nRefCountOfCurrentId ++;
        if( *ppThreadId )
        {
            rtl_byte_sequence_release( *ppThreadId );
        }
        *ppThreadId = id.pCurrentId;
        rtl_byte_sequence_acquire( *ppThreadId );
    }
}

extern "C" void SAL_CALL uno_releaseIdFromCurrentThread() noexcept
{
    IdContainer& id = getIdContainer();
    OSL_ASSERT( id.bInit );
    OSL_ASSERT( id.nRefCountOfCurrentId );

    id.nRefCountOfCurrentId --;
    if( ! id.nRefCountOfCurrentId && (id.pLocalThreadId != id.pCurrentId) )
    {
        rtl_byte_sequence_assign( &(id.pCurrentId) , id.pLocalThreadId );
    }
}

extern "C" sal_Bool SAL_CALL uno_bindIdToCurrentThread( sal_Sequence *pThreadId ) noexcept
{
    IdContainer& id = getIdContainer();
    if (!id.bInit)
    {
        id.pLocalThreadId = nullptr;
        createLocalId( &(id.pLocalThreadId) );
        id.nRefCountOfCurrentId = 1;
        id.pCurrentId = pThreadId;
        rtl_byte_sequence_acquire(id.pCurrentId);
        id.bInit = true;
    }
    else
    {
        OSL_ASSERT( 0 == id.nRefCountOfCurrentId );
        if( 0 == id.nRefCountOfCurrentId )
        {
            rtl_byte_sequence_assign(&( id.pCurrentId ), pThreadId );
            id.nRefCountOfCurrentId ++;
        }
        else
        {
            return false;
        }

    }
    return true;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

quality100%

¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.