| 1 | /* $Id: RTThreadPreemptDisable-r0drv-linux.c 15801 2009-01-05 13:18:08Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTThreadPreemptDisable, Generic ring-0 driver implementation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009 Sun Microsystems, Inc.
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | *
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| 26 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 27 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 28 | * additional information or have any questions.
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| 29 | */
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| 30 |
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| 31 | /*******************************************************************************
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| 32 | * Header Files *
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| 33 | *******************************************************************************/
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| 34 | #include "the-linux-kernel.h"
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| 35 |
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| 36 | #include <iprt/thread.h>
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| 37 | #include <iprt/assert.h>
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| 38 |
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| 39 |
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| 40 | RTDECL(void) RTThreadPreemptDisable(PRTTHREADPREEMPTSTATE pState)
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| 41 | {
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| 42 | AssertPtr(pState);
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| 43 | Assert(pState->uchDummy != 42);
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| 44 | pState->uchDummy = 42;
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| 45 |
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| 46 | /*
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| 47 | * Note: This call is a NOP if CONFIG_PREEMPT is not enabled in the Linux kernel
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| 48 | * configuration. In that case, schedule() is only called need_resched() is set
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| 49 | * which is tested just before we return to R3 (not when returning from R0 to R0).
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| 50 | */
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| 51 | preempt_disable();
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| 52 | }
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| 53 |
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