/** @file * innotek Portable Runtime - Multiprocessor. */ /* * Copyright (C) 2008 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; * 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. * * 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. */ #ifndef ___iprt_mp_h #define ___iprt_mp_h #include #include __BEGIN_DECLS /** @defgroup grp_rt_mp RTMp - Multiprocessor * @ingroup grp_rt * @{ */ /** * Gets the identifier of the CPU executing the call. * * When called from a system mode where scheduling is active, like ring-3 or * kernel mode with interrupts enabled on some systems, no assumptions should * be made about the current CPU when the call returns. * * @returns CPU Id. */ RTDECL(RTCPUID) RTMpCpuId(void); /** * Converts a CPU identifier to a CPU set index. * * This may or may not validate the precense of the CPU. * * @returns The CPU set index on success, -1 on failure. * @param idCpu The identifier of the CPU. */ RTDECL(int) RTMpCpuIdToSetIndex(RTCPUID idCpu); /** * Converts a CPU set index to a a CPU identifier. * * This may or may not validate the precense of the CPU, so, use * RTMpDoesCpuExist for that. * * @returns The corresponding CPU identifier, NIL_RTCPUID on failure. * @param iCpu The CPU set index. */ RTDECL(RTCPUID) RTMpCpuIdFromSetIndex(int iCpu); /** * Gets the max CPU identifier (inclusive). * * Inteded for brute force enumerations, but use with * care as it may be expensive. * * @returns The current higest CPU identifier value. */ RTDECL(RTCPUID) RTMpGetMaxCpuId(void); /** * Checks if a CPU is online or not. * * @returns true/false accordingly. * @param idCpu The identifier of the CPU. */ RTDECL(bool) RTMpIsCpuOnline(RTCPUID idCpu); /** * Checks if a CPU exist or not / validates a CPU id. * * @returns true/false accordingly. * @param idCpu The identifier of the CPU. */ RTDECL(bool) RTMpDoesCpuExist(RTCPUID idCpu); /** * Gets set of the CPUs present in the system. * * This may or may not validate the precense of the CPU, so, use * RTMpDoesCpuExist for that. * * @returns pSet. * @param pSet Where to put the set. */ RTDECL(PRTCPUSET) RTMpGetSet(PRTCPUSET pSet); /** * Get the count of CPUs presetn in the system. * * @return The count. */ RTDECL(RTCPUID) RTMpGetCount(void); /** * Gets set of the CPUs present that are currently online. * * @returns pSet. * @param pSet Where to put the set. */ RTDECL(PRTCPUSET) RTMpGetOnlineSet(PRTCPUSET pSet); /** * Get the count of CPUs that are currently online. * * @return The count. */ RTDECL(RTCPUID) RTMpGetOnlineCount(void); #ifdef IN_RING0 /** * Worker function passed to RTMpOnAll, RTMpOnOthers and RTMpOnSpecific that * is to be called on the target cpus. * * @param idCpu The identifier for the CPU the function is called on. * @param pvUser1 The 1st user argument. * @param pvUser2 The 2nd user argument. */ typedef DECLCALLBACK(void) FNRTMPWORKER(RTCPUID idCpu, void *pvUser1, void *pvUser2); /** Pointer to a FNRTMPWORKER. */ typedef FNRTMPWORKER *PFNRTMPWORKER; /** * Executes a function on each (online) CPU in the system. * * @returns IPRT status code. * @retval VINF_SUCCESS on success. * @retval VERR_NOT_SUPPORTED if this kind of operation isn't supported by the system. * * @param pfnWorker The worker function. * @param pvUser1 The first user argument for the worker. * @param pvUser2 The second user argument for the worker. * * @remarks The execution isn't in any way guaranteed to be simultaneous, * it might even be serial (cpu by cpu). */ RTDECL(int) RTMpOnAll(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2); /** * Executes a function on a all other (online) CPUs in the system. * * @returns IPRT status code. * @retval VINF_SUCCESS on success. * @retval VERR_NOT_SUPPORTED if this kind of operation isn't supported by the system. * * @param pfnWorker The worker function. * @param pvUser1 The first user argument for the worker. * @param pvUser2 The second user argument for the worker. * * @remarks The execution isn't in any way guaranteed to be simultaneous, * it might even be serial (cpu by cpu). */ RTDECL(int) RTMpOnOthers(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2); /** * Executes a function on a specific CPU in the system. * * @returns IPRT status code. * @retval VINF_SUCCESS on success. * @retval VERR_NOT_SUPPORTED if this kind of operation isn't supported by the system. * @retval VERR_CPU_OFFLINE if the CPU is offline. * @retval VERR_CPU_NOT_FOUND if the CPU wasn't found. * * @param idCpu The id of the CPU. * @param pfnWorker The worker function. * @param pvUser1 The first user argument for the worker. * @param pvUser2 The second user argument for the worker. */ RTDECL(int) RTMpOnSpecific(RTCPUID idCpu, PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2); #endif /* IN_RING0 */ /** @} */ __END_DECLS #endif