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| -rw-r--r-- | include/iprt/system.h | 293 |
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diff --git a/include/iprt/system.h b/include/iprt/system.h new file mode 100644 index 00000000..2932fde9 --- /dev/null +++ b/include/iprt/system.h @@ -0,0 +1,293 @@ +/** @file + * IPRT - System Information. + */ + +/* + * 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_system_h +#define IPRT_INCLUDED_system_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/cdefs.h> +#include <iprt/types.h> + + +RT_C_DECLS_BEGIN + +/** @defgroup grp_rt_system RTSystem - System Information + * @ingroup grp_rt + * @{ + */ + +/** + * Info level for RTSystemGetOSInfo(). + */ +typedef enum RTSYSOSINFO +{ + RTSYSOSINFO_INVALID = 0, /**< The usual invalid entry. */ + RTSYSOSINFO_PRODUCT, /**< OS product name. (uname -o) */ + RTSYSOSINFO_RELEASE, /**< OS release. (uname -r) */ + RTSYSOSINFO_VERSION, /**< OS version, optional. (uname -v) */ + RTSYSOSINFO_SERVICE_PACK, /**< Service/fix pack level, optional. */ + RTSYSOSINFO_END /**< End of the valid info levels. */ +} RTSYSOSINFO; + + +/** + * Queries information about the OS. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VERR_INVALID_PARAMETER if enmInfo is invalid. + * @retval VERR_INVALID_POINTER if pszInfoStr is invalid. + * @retval VERR_BUFFER_OVERFLOW if the buffer is too small. The buffer will + * contain the chopped off result in this case, provided cchInfo isn't 0. + * @retval VERR_NOT_SUPPORTED if the info level isn't implemented. The buffer will + * contain an empty string. + * + * @param enmInfo The OS info level. + * @param pszInfo Where to store the result. + * @param cchInfo The size of the output buffer. + */ +RTDECL(int) RTSystemQueryOSInfo(RTSYSOSINFO enmInfo, char *pszInfo, size_t cchInfo); + +/** + * Queries the total amount of RAM in the system. + * + * This figure does not given any information about how much memory is + * currently available. Use RTSystemQueryAvailableRam instead. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS and *pcb on sucess. + * @retval VERR_ACCESS_DENIED if the information isn't accessible to the + * caller. + * + * @param pcb Where to store the result (in bytes). + */ +RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb); + +/** + * Queries the total amount of RAM accessible to the system. + * + * This figure should not include memory that is installed but not used, + * nor memory that will be slow to bring online. The definition of 'slow' + * here is slower than swapping out a MB of pages to disk. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS and *pcb on success. + * @retval VERR_ACCESS_DENIED if the information isn't accessible to the + * caller. + * + * @param pcb Where to store the result (in bytes). + */ +RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb); + +/** + * Queries the amount of RAM that is currently locked down or in some other + * way made impossible to virtualize within reasonably short time. + * + * The purposes of this API is, when combined with RTSystemQueryTotalRam, to + * be able to determine an absolute max limit for how much fixed memory it is + * (theoretically) possible to allocate (or lock down). + * + * The kind memory covered by this function includes: + * - locked (wired) memory - like for instance RTR0MemObjLockUser + * and RTR0MemObjLockKernel makes, + * - kernel pools and heaps - like for instance the ring-0 variant + * of RTMemAlloc taps into, + * - fixed (not pageable) kernel allocations - like for instance + * all the RTR0MemObjAlloc* functions makes, + * - any similar memory that isn't easily swapped out, discarded, + * or flushed to disk. + * + * This works against the value returned by RTSystemQueryTotalRam, and + * the value reported by this function can never be larger than what a + * call to RTSystemQueryTotalRam returns. + * + * The short time term here is relative to swapping to disk like in + * RTSystemQueryTotalRam. This could mean that (part of) the dirty buffers + * in the dynamic I/O cache could be included in the total. If the dynamic + * I/O cache isn't likely to either flush buffers when the load increases + * and put them back into normal circulation, they should be included in + * the memory accounted for here. + * + * @retval VINF_SUCCESS and *pcb on success. + * @retval VERR_NOT_SUPPORTED if the information isn't available on the + * system in general. The caller must handle this scenario. + * @retval VERR_ACCESS_DENIED if the information isn't accessible to the + * caller. + * + * @param pcb Where to store the result (in bytes). + * + * @remarks This function could've been inverted and called + * RTSystemQueryAvailableRam, but that might give impression that + * it would be possible to allocate the amount of memory it + * indicates for a single purpose, something which would be very + * improbable on most systems. + * + * @remarks We might have to add another output parameter to this function + * that indicates if some of the memory kinds listed above cannot + * be accounted for on the system and therefore is not include in + * the returned amount. + */ +RTDECL(int) RTSystemQueryUnavailableRam(uint64_t *pcb); + + +/** + * The DMI strings. + */ +typedef enum RTSYSDMISTR +{ + /** Invalid zero entry. */ + RTSYSDMISTR_INVALID = 0, + /** The product name. */ + RTSYSDMISTR_PRODUCT_NAME, + /** The product version. */ + RTSYSDMISTR_PRODUCT_VERSION, + /** The product UUID. */ + RTSYSDMISTR_PRODUCT_UUID, + /** The product serial. */ + RTSYSDMISTR_PRODUCT_SERIAL, + /** The system manufacturer. */ + RTSYSDMISTR_MANUFACTURER, + /** The end of the valid strings. */ + RTSYSDMISTR_END, + /** The usual 32-bit hack. */ + RTSYSDMISTR_32_BIT_HACK = 0x7fffffff +} RTSYSDMISTR; + +/** + * Queries a DMI string. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VERR_BUFFER_OVERFLOW if the buffer is too small. The buffer will + * contain the chopped off result in this case, provided cbBuf isn't 0. + * @retval VERR_ACCESS_DENIED if the information isn't accessible to the + * caller. + * @retval VERR_NOT_SUPPORTED if the information isn't available on the system + * in general. The caller must expect this status code and deal with + * it. + * + * @param enmString Which string to query. + * @param pszBuf Where to store the string. This is always + * terminated, even on error. + * @param cbBuf The buffer size. + */ +RTDECL(int) RTSystemQueryDmiString(RTSYSDMISTR enmString, char *pszBuf, size_t cbBuf); + +/** @name Flags for RTSystemReboot and RTSystemShutdown. + * @{ */ +/** Reboot the system after shutdown. */ +#define RTSYSTEM_SHUTDOWN_REBOOT UINT32_C(0) +/** Reboot the system after shutdown. + * The call may return VINF_SYS_MAY_POWER_OFF if the OS / + * hardware combination may power off instead of halting. */ +#define RTSYSTEM_SHUTDOWN_HALT UINT32_C(1) +/** Power off the system after shutdown. + * This may be equvivalent to a RTSYSTEM_SHUTDOWN_HALT on systems where we + * cannot figure out whether the hardware/OS implements the actual powering + * off. If we can figure out that it's not supported, an + * VERR_SYS_CANNOT_POWER_OFF error is raised. */ +#define RTSYSTEM_SHUTDOWN_POWER_OFF UINT32_C(2) +/** Power off the system after shutdown, or halt it if that's not possible. */ +#define RTSYSTEM_SHUTDOWN_POWER_OFF_HALT UINT32_C(3) +/** The shutdown action mask. */ +#define RTSYSTEM_SHUTDOWN_ACTION_MASK UINT32_C(3) +/** Unplanned shutdown/reboot. */ +#define RTSYSTEM_SHUTDOWN_UNPLANNED UINT32_C(0) +/** Planned shutdown/reboot. */ +#define RTSYSTEM_SHUTDOWN_PLANNED RT_BIT_32(2) +/** Force the system to shutdown/reboot regardless of objecting application + * or other stuff. This flag might not be realized on all systems. */ +#define RTSYSTEM_SHUTDOWN_FORCE RT_BIT_32(3) +/** Parameter validation mask. */ +#define RTSYSTEM_SHUTDOWN_VALID_MASK UINT32_C(0x0000000f) +/** @} */ + +/** + * Shuts down the system. + * + * @returns IPRT status code on failure, on success it may or may not return + * depending on the OS. + * @retval VINF_SUCCESS + * @retval VINF_SYS_MAY_POWER_OFF + * @retval VERR_SYS_SHUTDOWN_FAILED + * @retval VERR_SYS_CANNOT_POWER_OFF + * + * @param cMsDelay The delay before the actual reboot. If this is + * not supported by the OS, an immediate reboot + * will be performed. + * @param fFlags Shutdown flags, see RTSYSTEM_SHUTDOWN_XXX. + * @param pszLogMsg Message for the log and users about why we're + * shutting down. + */ +RTDECL(int) RTSystemShutdown(RTMSINTERVAL cMsDelay, uint32_t fFlags, const char *pszLogMsg); + +/** + * Checks if we're executing inside a virtual machine (VM). + * + * The current implemention is very simplistic and won't try to detect the + * presence of a virtual machine monitor (VMM) unless it openly tells us it is + * there. + * + * @returns true if inside a VM, false if on real hardware. + * + * @todo If more information is needed, like which VMM it is and which + * version and such, add one or two new APIs. + */ +RTDECL(bool) RTSystemIsInsideVM(void); + +#ifdef RT_OS_WINDOWS + +/** + * Get the Windows NT build number. + * + * @returns NT build number. + * + * @remarks Windows NT only. Requires IPRT to be initialized. + */ +RTDECL(uint32_t) RTSystemGetNtBuildNo(void); + +/** Makes an NT version for comparison with RTSystemGetNtVersion(). */ +# define RTSYSTEM_MAKE_NT_VERSION(a_uMajor, a_uMinor, a_uBuild) \ + ( ((uint64_t)(a_uMajor) << 52) | ((uint64_t)((a_uMinor) & 0xfffU) << 40) | ((uint32_t)(a_uBuild)) ) + +/** + * Get the Windows NT version number. + * + * @returns Version formatted using RTSYSTEM_MAKE_NT_VERSION(). + * + * @remarks Windows NT only. Requires IPRT to be initialized. + */ +RTDECL(uint64_t) RTSystemGetNtVersion(void); + +#endif /* RT_OS_WINDOWS */ + +/** @} */ + +RT_C_DECLS_END + +#endif /* !IPRT_INCLUDED_system_h */ + |