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/** @file
* IPRT - Runtime Init/Term.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* 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.
*/
#ifndef IPRT_INCLUDED_initterm_h
#define IPRT_INCLUDED_initterm_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/cdefs.h>
#include <iprt/types.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_rt IPRT C/C++ APIs
* @{
*/
/** @defgroup grp_rt_initterm RTInit/RTTerm - Initialization and Termination
*
* APIs for initializing and terminating the IPRT, optionally it can also
* convert input arguments to UTF-8 (in ring-3).
*
* @sa RTOnce, RTOnceEx.
*
* @{
*/
#ifdef IN_RING3
/** @name RTR3Init flags (RTR3INIT_XXX).
* @{ */
/** Try initialize SUPLib. */
#define RTR3INIT_FLAGS_SUPLIB RT_BIT(0)
/** Initializing IPRT from a DLL. */
#define RTR3INIT_FLAGS_DLL RT_BIT(1)
/** We are sharing a process space, so we need to behave. */
#define RTR3INIT_FLAGS_UNOBTRUSIVE RT_BIT(2)
/** The caller ensures that the argument bector is UTF-8. */
#define RTR3INIT_FLAGS_UTF8_ARGV RT_BIT(3)
/** Indicates that this is a standalone application without any additional
* shared libraries in the application directory. Mainly windows loader mess. */
#define RTR3INIT_FLAGS_STANDALONE_APP RT_BIT(4)
/** @} */
/** @name RTR3InitEx version
* @{ */
/** Version 1. */
#define RTR3INIT_VER_1 UINT32_C(1)
/** The current version. */
#define RTR3INIT_VER_CUR RTR3INIT_VER_1
/** @} */
/**
* Initializes the runtime library.
*
* @returns iprt status code.
* @param fFlags Flags, see RTR3INIT_XXX.
*/
RTR3DECL(int) RTR3InitExeNoArguments(uint32_t fFlags);
/**
* Initializes the runtime library.
*
* @returns iprt status code.
* @param cArgs Pointer to the argument count.
* @param ppapszArgs Pointer to the argument vector pointer.
* @param fFlags Flags, see RTR3INIT_XXX.
*/
RTR3DECL(int) RTR3InitExe(int cArgs, char ***ppapszArgs, uint32_t fFlags);
/**
* Initializes the runtime library.
*
* @returns iprt status code.
* @param fFlags Flags, see RTR3INIT_XXX.
*/
RTR3DECL(int) RTR3InitDll(uint32_t fFlags);
/**
* Initializes the runtime library and possibly also SUPLib too.
*
* Avoid this interface, it's not considered stable.
*
* @returns IPRT status code.
* @param iVersion The interface version. Must be 0 atm.
* @param fFlags Flags, see RTR3INIT_XXX.
* @param cArgs Pointer to the argument count.
* @param ppapszArgs Pointer to the argument vector pointer. NULL
* allowed if @a cArgs is 0.
* @param pszProgramPath The program path. Pass NULL if we're to figure it
* out ourselves.
*/
RTR3DECL(int) RTR3InitEx(uint32_t iVersion, uint32_t fFlags, int cArgs, char ***ppapszArgs, const char *pszProgramPath);
/**
* Terminates the runtime library.
*/
RTR3DECL(void) RTR3Term(void);
/**
* Is IPRT succesfully initialized?
*
* @returns true/false.
*/
RTR3DECL(bool) RTR3InitIsInitialized(void);
/**
* Are we running in unobtrusive mode?
* @returns true/false.
*/
RTR3DECL(bool) RTR3InitIsUnobtrusive(void);
#endif /* IN_RING3 */
#ifdef IN_RING0
/**
* Initializes the ring-0 driver runtime library.
*
* @returns iprt status code.
* @param fReserved Flags reserved for the future.
*/
RTR0DECL(int) RTR0Init(unsigned fReserved);
/**
* Terminates the ring-0 driver runtime library.
*/
RTR0DECL(void) RTR0Term(void);
/**
* Forcibily terminates the ring-0 driver runtime library.
*
* This should be used when statically linking the IPRT. Module using dynamic
* linking shall use RTR0Term. If you're not sure, use RTR0Term!
*/
RTR0DECL(void) RTR0TermForced(void);
#endif
#ifdef IN_RC
/**
* Initializes the raw-mode context runtime library.
*
* @returns iprt status code.
*
* @param u64ProgramStartNanoTS The startup timestamp.
*/
RTRCDECL(int) RTRCInit(uint64_t u64ProgramStartNanoTS);
/**
* Terminates the raw-mode context runtime library.
*/
RTRCDECL(void) RTRCTerm(void);
#endif
/**
* Termination reason.
*/
typedef enum RTTERMREASON
{
/** Normal exit. iStatus contains the exit code. */
RTTERMREASON_EXIT = 1,
/** Any abnormal exit. iStatus is 0 and has no meaning. */
RTTERMREASON_ABEND,
/** Killed by a signal. The iStatus contains the signal number. */
RTTERMREASON_SIGNAL,
/** The IPRT module is being unloaded. iStatus is 0 and has no meaning. */
RTTERMREASON_UNLOAD
} RTTERMREASON;
/** Whether lazy clean up is Okay or not.
* When the process is exiting, it is a waste of time to for instance free heap
* memory or close open files. OTOH, when the runtime is unloaded from the
* process, it is important to release absolutely all resources to prevent
* resource leaks. */
#define RTTERMREASON_IS_LAZY_CLEANUP_OK(enmReason) ((enmReason) != RTTERMREASON_UNLOAD)
/**
* IPRT termination callback function.
*
* @param enmReason The cause of the termination.
* @param iStatus The meaning of this depends on enmReason.
* @param pvUser User argument passed to RTTermRegisterCallback.
*/
typedef DECLCALLBACK(void) FNRTTERMCALLBACK(RTTERMREASON enmReason, int32_t iStatus, void *pvUser);
/** Pointer to an IPRT termination callback function. */
typedef FNRTTERMCALLBACK *PFNRTTERMCALLBACK;
/**
* Registers a termination callback.
*
* This is intended for performing clean up during IPRT termination. Frequently
* paired with lazy initialization thru RTOnce.
*
* The callbacks are called in LIFO order.
*
* @returns IPRT status code.
*
* @param pfnCallback The callback function.
* @param pvUser The user argument for the callback.
*
* @remarks May need to acquire a fast mutex or critical section, so use with
* some care in ring-0 context.
*
* @remarks Be very careful using this from code that may be unloaded before
* IPRT terminates. Unlike some atexit and on_exit implementations,
* IPRT will not automatically unregister callbacks when a module gets
* unloaded.
*/
RTDECL(int) RTTermRegisterCallback(PFNRTTERMCALLBACK pfnCallback, void *pvUser);
/**
* Deregister a termination callback.
*
* @returns VINF_SUCCESS if found, VERR_NOT_FOUND if the callback/pvUser pair
* wasn't found.
*
* @param pfnCallback The callback function.
* @param pvUser The user argument for the callback.
*/
RTDECL(int) RTTermDeregisterCallback(PFNRTTERMCALLBACK pfnCallback, void *pvUser);
/**
* Runs the termination callback queue.
*
* Normally called by an internal IPRT termination function, but may also be
* called by external code immediately prior to terminating IPRT if it is in a
* better position to state the termination reason and/or status.
*
* @param enmReason The reason why it's called.
* @param iStatus The associated exit status or signal number.
*/
RTDECL(void) RTTermRunCallbacks(RTTERMREASON enmReason, int32_t iStatus);
/** @} */
/** @} */
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_initterm_h */
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