thread-r0drv-linux.c revision 4589067b02bb33c477d399abc0f999e5d3a8c146
/* $Id$ */
/** @file
* IPRT - Threads, Ring-0 Driver, Linux.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "the-linux-kernel.h"
/*******************************************************************************
* Global Variables *
*******************************************************************************/
#ifndef CONFIG_PREEMPT
/** Per-cpu preemption counters. */
#endif
{
return (RTNATIVETHREAD)current;
}
{
if (!cJiffies)
return VINF_SUCCESS;
return VERR_INTERRUPTED;
}
RTDECL(bool) RTThreadYield(void)
{
yield();
#else
schedule();
#endif
return true;
}
{
#ifdef CONFIG_PREEMPT
# ifdef preemptible
return preemptible();
# else
# endif
#else
int32_t c;
c = g_acPreemptDisabled[smp_processor_id()];
if (c != 0)
return false;
if (in_atomic())
return false;
# endif
if (irqs_disabled())
return false;
# else
if (!ASMIntAreEnabled())
return false;
# endif
return true;
#endif
}
{
return !!need_resched();
return current->need_resched != 0;
#else
return need_resched != 0;
#endif
}
RTDECL(bool) RTThreadPreemptIsPendingTrusty(void)
{
/* yes, RTThreadPreemptIsPending is reliable. */
return true;
}
RTDECL(bool) RTThreadPreemptIsPossible(void)
{
#ifdef CONFIG_PREEMPT
return true; /* yes, kernel preemption is possible. */
#else
return false; /* no kernel preemption */
#endif
}
{
#ifdef CONFIG_PREEMPT
#else /* !CONFIG_PREEMPT */
int32_t c;
/* Do our own accounting. */
pState->u32Reserved = c;
#endif
}
{
#ifdef CONFIG_PREEMPT
#else
/* Do our own accounting. */
AssertMsg(pState->u32Reserved == (uint32_t)*pc, ("u32Reserved=%d *pc=%d \n", pState->u32Reserved, *pc));
#endif
pState->u32Reserved = 0;
}
{
return in_interrupt() != 0;
}