Current File : //usr/src/vboxhost-7.0.26/vboxdrv/include/internal/iprt.h
/* $Id: iprt.h 155244 2023-01-17 14:15:46Z bird $ */
/** @file
* IPRT - Internal header for miscellaneous global defs and types.
*/
/*
* Copyright (C) 2009-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_INTERNAL_iprt_h
#define IPRT_INCLUDED_INTERNAL_iprt_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/cdefs.h>
#include <iprt/types.h>
/** @def RT_EXPORT_SYMBOL
* This define is really here just for the linux kernel.
* @param Name The symbol name.
*/
#if defined(RT_OS_LINUX) \
&& defined(IN_RING0) \
&& defined(MODULE) \
&& !defined(RT_NO_EXPORT_SYMBOL)
# define bool linux_bool /* see r0drv/linux/the-linux-kernel.h */
# include <linux/version.h>
# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
# include <generated/autoconf.h>
# else
# ifndef AUTOCONF_INCLUDED
# include <linux/autoconf.h>
# endif
# endif
# if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
# define MODVERSIONS
# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 71)
# include <linux/modversions.h>
# endif
# endif
# include <linux/module.h>
# undef bool
# define RT_EXPORT_SYMBOL(Name) EXPORT_SYMBOL(Name)
#else
# define RT_EXPORT_SYMBOL(Name) extern int g_rtExportSymbolDummyVariable
#endif
/** @def RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL
* Creates symbol alias and export a RT_NOCRT symbol.
*
* For targets using ELF this macro generates weak symbol aliases, for the other
* object formats the makefile scans source files for this macro and produces
* separate object files with the aliases.
*
* @param a_Name The CRT function or variable name.
*
* @todo Does not support ELF targets using underscore prefixed symbols.
*/
#if defined(__ELF__) && defined(RT_WITH_NOCRT_ALIASES) && !defined(RT_WITHOUT_NOCRT_ALIASES)
# ifdef RT_WITH_NOCRT_UNDERSCORE_ALIASES
# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(a_Name) RT_EXPORT_SYMBOL(a_Name) \
__asm__(".weak " #a_Name "\n\t" \
".set " #a_Name "," RT_NOCRT_STR(a_Name) "\n\t" \
".weak _" #a_Name "\n\t" \
".set _" #a_Name "," RT_NOCRT_STR(a_Name) "\n\t")
# else
# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(a_Name) RT_EXPORT_SYMBOL(a_Name) \
__asm__(".weak " #a_Name "\n\t" \
".set " #a_Name "," RT_NOCRT_STR(a_Name) "\n\t")
# endif
#else
# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(a_Name) RT_EXPORT_SYMBOL(a_Name)
#endif
/** @def RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE
* Variant of RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL that omits the
* underscore-prefixed variant of the symbol.
*
* @param a_Name The CRT function or variable name.
*/
#if defined(__ELF__) && defined(RT_WITH_NOCRT_ALIASES) && !defined(RT_WITHOUT_NOCRT_ALIASES)
# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE(a_Name) RT_EXPORT_SYMBOL(a_Name) \
__asm__(".weak " #a_Name "\n\t" \
".set " #a_Name "," RT_NOCRT_STR(a_Name) "\n\t")
#else
# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE(a_Name) RT_EXPORT_SYMBOL(a_Name)
#endif
/** @def RT_MORE_STRICT
* Enables more assertions in IPRT. */
#if !defined(RT_MORE_STRICT) && (defined(DEBUG) || defined(RT_STRICT) || defined(DOXYGEN_RUNNING)) && !defined(RT_OS_WINDOWS) /** @todo enable on windows after testing */
# define RT_MORE_STRICT
#endif
/** @def RT_ASSERT_PREEMPT_CPUID_VAR
* Partner to RT_ASSERT_PREEMPT_CPUID_VAR. Declares and initializes a variable
* idAssertCpu to NIL_RTCPUID if preemption is enabled and to RTMpCpuId if
* disabled. When RT_MORE_STRICT isn't defined it declares an uninitialized
* dummy variable.
*
* Requires iprt/mp.h and iprt/asm.h.
*/
/** @def RT_ASSERT_PREEMPT_CPUID
* Asserts that we didn't change CPU since RT_ASSERT_PREEMPT_CPUID_VAR if
* preemption is disabled. Will also detect changes in preemption
* disable/enable status. This is a noop when RT_MORE_STRICT isn't defined. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPT_CPUID_VAR() \
RTCPUID const idAssertCpu = RTThreadPreemptIsEnabled(NIL_RTTHREAD) ? NIL_RTCPUID : RTMpCpuId()
# define RT_ASSERT_PREEMPT_CPUID() \
do \
{ \
RTCPUID const idAssertCpuNow = RTThreadPreemptIsEnabled(NIL_RTTHREAD) ? NIL_RTCPUID : RTMpCpuId(); \
AssertMsg(idAssertCpu == idAssertCpuNow, ("%#x, %#x\n", idAssertCpu, idAssertCpuNow)); \
} while (0)
#else
# define RT_ASSERT_PREEMPT_CPUID_VAR() RTCPUID idAssertCpuDummy
# define RT_ASSERT_PREEMPT_CPUID() NOREF(idAssertCpuDummy)
#endif
/** @def RT_ASSERT_PREEMPT_CPUID_SPIN_ACQUIRED
* Extended version of RT_ASSERT_PREEMPT_CPUID for use before
* RTSpinlockAcquired* returns. This macro works the idCpuOwner and idAssertCpu
* members of the spinlock instance data. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPT_CPUID_SPIN_ACQUIRED(pThis) \
do \
{ \
RTCPUID const idAssertCpuNow = RTMpCpuId(); \
AssertMsg(idAssertCpu == idAssertCpuNow || idAssertCpu == NIL_RTCPUID, ("%#x, %#x\n", idAssertCpu, idAssertCpuNow)); \
(pThis)->idAssertCpu = idAssertCpu; \
(pThis)->idCpuOwner = idAssertCpuNow; \
} while (0)
#else
# define RT_ASSERT_PREEMPT_CPUID_SPIN_ACQUIRED(pThis) NOREF(idAssertCpuDummy)
#endif
/** @def RT_ASSERT_PREEMPT_CPUID_SPIN_RELEASE_VARS
* Extended version of RT_ASSERT_PREEMPT_CPUID_VAR for use with
* RTSpinlockRelease* returns. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPT_CPUID_SPIN_RELEASE_VARS() RTCPUID idAssertCpu
#else
# define RT_ASSERT_PREEMPT_CPUID_SPIN_RELEASE_VARS() RTCPUID idAssertCpuDummy
#endif
/** @def RT_ASSERT_PREEMPT_CPUID_SPIN_RELEASE
* Extended version of RT_ASSERT_PREEMPT_CPUID for use in RTSpinlockRelease*
* before calling the native API for releasing the spinlock. It must be
* teamed up with RT_ASSERT_PREEMPT_CPUID_SPIN_ACQUIRED. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPT_CPUID_SPIN_RELEASE(pThis) \
do \
{ \
RTCPUID const idCpuOwner = (pThis)->idCpuOwner; \
RTCPUID const idAssertCpuNow = RTMpCpuId(); \
AssertMsg(idCpuOwner == idAssertCpuNow, ("%#x, %#x\n", idCpuOwner, idAssertCpuNow)); \
(pThis)->idCpuOwner = NIL_RTCPUID; \
idAssertCpu = (pThis)->idAssertCpu; \
(pThis)->idAssertCpu = NIL_RTCPUID; \
} while (0)
#else
# define RT_ASSERT_PREEMPT_CPUID_SPIN_RELEASE(pThis) NOREF(idAssertCpuDummy)
#endif
/** @def RT_ASSERT_PREEMPT_CPUID_DISABLE
* For use in RTThreadPreemptDisable implementations after having disabled
* preemption. Requires iprt/mp.h. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPT_CPUID_DISABLE(pStat) \
do \
{ \
Assert((pStat)->idCpu == NIL_RTCPUID); \
(pStat)->idCpu = RTMpCpuId(); \
} while (0)
#else
# define RT_ASSERT_PREEMPT_CPUID_DISABLE(pStat) \
Assert((pStat)->idCpu == NIL_RTCPUID)
#endif
/** @def RT_ASSERT_PREEMPT_CPUID_RESTORE
* For use in RTThreadPreemptRestore implementations before restoring
* preemption. Requires iprt/mp.h. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPT_CPUID_RESTORE(pStat) \
do \
{ \
RTCPUID const idAssertCpuNow = RTMpCpuId(); \
AssertMsg((pStat)->idCpu == idAssertCpuNow, ("%#x, %#x\n", (pStat)->idCpu, idAssertCpuNow)); \
(pStat)->idCpu = NIL_RTCPUID; \
} while (0)
#else
# define RT_ASSERT_PREEMPT_CPUID_RESTORE(pStat) do { } while (0)
#endif
/** @def RT_ASSERT_INTS_ON
* Asserts that interrupts are disabled when RT_MORE_STRICT is defined. */
#ifdef RT_MORE_STRICT
# if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# define RT_ASSERT_INTS_ON() Assert(ASMIntAreEnabled())
# else /* PORTME: Add architecture/platform specific test. */
# define RT_ASSERT_INTS_ON() Assert(RTThreadPreemptIsEnabled(NIL_RTTHREAD))
# endif
#else
# define RT_ASSERT_INTS_ON() do { } while (0)
#endif
/** @def RT_ASSERT_PREEMPTIBLE
* Asserts that preemption hasn't been disabled (using
* RTThreadPreemptDisable) when RT_MORE_STRICT is defined. */
#ifdef RT_MORE_STRICT
# define RT_ASSERT_PREEMPTIBLE() Assert(RTThreadPreemptIsEnabled(NIL_RTTHREAD))
#else
# define RT_ASSERT_PREEMPTIBLE() do { } while (0)
#endif
RT_C_DECLS_BEGIN
#ifdef RT_OS_OS2
uint32_t rtR0SemWaitOs2ConvertTimeout(uint32_t fFlags, uint64_t uTimeout);
#endif
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_INTERNAL_iprt_h */
Mini Shell