tls-generic.cpp revision 1c94c0a63ba68be1a7b2c640e70d7a06464e4fca
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * innotek Portable Runtime - Thread Local Storage (TSL), Generic Implementation.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * Copyright (C) 2008 Sun Microsystems, Inc.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * available from http://www.virtualbox.org. This file is free software;
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * you can redistribute it and/or modify it under the terms of the GNU
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * General Public License (GPL) as published by the Free Software
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * The contents of this file may alternatively be used under the terms
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * of the Common Development and Distribution License Version 1.0
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * VirtualBox OSE distribution, in which case the provisions of the
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * CDDL are applicable instead of those of the GPL.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * You may elect to license modified versions of this file under the
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * terms and conditions of either the GPL or the CDDL or both.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * additional information or have any questions.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync/*******************************************************************************
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync* Header Files *
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync*******************************************************************************/
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync/*******************************************************************************
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync* Global Variables *
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync*******************************************************************************/
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync/** Allocation bitmap. Set bits indicates allocated entries. */
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsyncstatic uint32_t volatile g_au32AllocatedBitmap[(RTTHREAD_TLS_ENTRIES + 31) / 32];
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync/** Destructors for each of the TLS entries. */
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsyncstatic PFNRTTLSDTOR g_apfnDestructors[RTTHREAD_TLS_ENTRIES];
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsyncRTR3DECL(int) RTTlsAllocEx(PRTTLS piTls, PFNRTTLSDTOR pfnDestructor)
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync for (unsigned i = 0; i < 128; i++)
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync int iTls = ASMBitFirstClear(&g_au32AllocatedBitmap[0], RTTHREAD_TLS_ENTRIES);
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync if (!ASMAtomicBitTestAndSet(&g_au32AllocatedBitmap[0], iTls))
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync ASMAtomicWritePtr((void * volatile *)&g_apfnDestructors[iTls], NULL);
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync ASMAtomicBitClear(&g_au32AllocatedBitmap[0], iTls);
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsyncRTR3DECL(int) RTTlsGetEx(RTTLS iTls, void **ppvValue)
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync PRTTHREADINT pThread = rtThreadGet(RTThreadSelf());
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync PRTTHREADINT pThread = rtThreadGet(RTThreadSelf());
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * Called at thread termination to invoke TLS destructors.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync * @param pThread The current thread.
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync for (RTTLS iTls = 0; iTls < RTTHREAD_TLS_ENTRIES; iTls++)
2748ec9a37a53b7f444e11e02e7b1a538558d557vboxsync PFNRTTLSDTOR pfnDestructor = (PFNRTTLSDTOR)(uintptr_t)ASMAtomicUoReadPtr((void * volatile *)(uintptr_t)&g_apfnDestructors[iTls]);