thread-r0drv-freebsd.c revision e64031e20c39650a7bc902a3e1aba613b9415dee
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync/* $Id$ */
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync/** @file
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * IPRT - Threads (Part 1), Ring-0 Driver, FreeBSD.
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync */
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync/*
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * Copyright (C) 2007-2009 Oracle Corporation
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync *
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * available from http://www.virtualbox.org. This file is free software;
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * you can redistribute it and/or modify it under the terms of the GNU
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * General Public License (GPL) as published by the Free Software
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync *
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * The contents of this file may alternatively be used under the terms
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync * of the Common Development and Distribution License Version 1.0
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync * VirtualBox OSE distribution, in which case the provisions of the
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync * CDDL are applicable instead of those of the GPL.
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync *
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync * You may elect to license modified versions of this file under the
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync * terms and conditions of either the GPL or the CDDL or both.
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync */
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync
930b5f872e89407f445d4000d4e4aaecaa6a0998vboxsync/*******************************************************************************
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync* Header Files *
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync*******************************************************************************/
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include "the-freebsd-kernel.h"
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include "internal/iprt.h"
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include <iprt/thread.h>
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include <iprt/asm.h>
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include <iprt/assert.h>
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include <iprt/err.h>
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include <iprt/mp.h>
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync#include "internal/thread.h"
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsyncRTDECL(RTNATIVETHREAD) RTThreadNativeSelf(void)
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync{
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync return (RTNATIVETHREAD)curthread;
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync}
3194da424708abdd288b28d96892b3a5f3f7df0bvboxsync
RTDECL(int) RTThreadSleep(RTMSINTERVAL cMillies)
{
int rc;
int cTicks;
/*
* 0 ms sleep -> yield.
*/
if (!cMillies)
{
RTThreadYield();
return VINF_SUCCESS;
}
/*
* Translate milliseconds into ticks and go to sleep.
*/
if (cMillies != RT_INDEFINITE_WAIT)
{
if (hz == 1000)
cTicks = cMillies;
else if (hz == 100)
cTicks = cMillies / 10;
else
{
int64_t cTicks64 = ((uint64_t)cMillies * hz) / 1000;
cTicks = (int)cTicks64;
if (cTicks != cTicks64)
cTicks = INT_MAX;
}
}
else
cTicks = 0; /* requires giant lock! */
rc = tsleep((void *)RTThreadSleep,
PZERO | PCATCH,
"iprtsl", /* max 6 chars */
cTicks);
switch (rc)
{
case 0:
return VINF_SUCCESS;
case EWOULDBLOCK:
return VERR_TIMEOUT;
case EINTR:
case ERESTART:
return VERR_INTERRUPTED;
default:
AssertMsgFailed(("%d\n", rc));
return VERR_NO_TRANSLATION;
}
}
RTDECL(bool) RTThreadYield(void)
{
uio_yield();
return false; /** @todo figure this one ... */
}
RTDECL(bool) RTThreadPreemptIsEnabled(RTTHREAD hThread)
{
Assert(hThread == NIL_RTTHREAD);
return curthread->td_critnest == 0
&& ASMIntAreEnabled(); /** @todo is there a native freebsd function/macro for this? */
}
RTDECL(bool) RTThreadPreemptIsPending(RTTHREAD hThread)
{
Assert(hThread == NIL_RTTHREAD);
return curthread->td_owepreempt == 1;
}
RTDECL(bool) RTThreadPreemptIsPendingTrusty(void)
{
/* yes, RTThreadPreemptIsPending is reliable. */
return true;
}
RTDECL(bool) RTThreadPreemptIsPossible(void)
{
/* yes, kernel preemption is possible. */
return true;
}
RTDECL(void) RTThreadPreemptDisable(PRTTHREADPREEMPTSTATE pState)
{
AssertPtr(pState);
Assert(pState->u32Reserved == 0);
pState->u32Reserved = 42;
critical_enter();
RT_ASSERT_PREEMPT_CPUID_DISABLE(pState);
}
RTDECL(void) RTThreadPreemptRestore(PRTTHREADPREEMPTSTATE pState)
{
AssertPtr(pState);
Assert(pState->u32Reserved == 42);
pState->u32Reserved = 0;
RT_ASSERT_PREEMPT_CPUID_RESTORE(pState);
critical_exit();
}
RTDECL(bool) RTThreadIsInInterrupt(RTTHREAD hThread)
{
Assert(hThread == NIL_RTTHREAD); NOREF(hThread);
/** @todo FreeBSD: Implement RTThreadIsInInterrupt. Required for guest
* additions! */
return !ASMIntAreEnabled();
}