| 1 | /** @file
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| 2 | * innotek Portable Runtime - Multiprocessor.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2008 innotek GmbH
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | #ifndef ___iprt_mp_h
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| 27 | #define ___iprt_mp_h
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| 28 |
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| 29 | #include <iprt/cdefs.h>
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| 30 | #include <iprt/types.h>
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| 31 |
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| 32 |
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| 33 | __BEGIN_DECLS
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| 34 |
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| 35 | /** @defgroup grp_rt_mp RTMp - Multiprocessor
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| 36 | * @ingroup grp_rt
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| 37 | * @{
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| 38 | */
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| 39 |
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| 40 | /** Maximum number of CPUs we support in one system.
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| 41 | * @remarks The current limit in Windows (affinity mask)
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| 42 | *
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| 43 | */
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| 44 | #define RT_MP_MAX_CPU 64
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| 45 |
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| 46 |
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| 47 | /** A CPU identifier.
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| 48 | * @remarks This doesn't have to correspond to the APIC ID (intel/amd). Nor
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| 49 | * does it have to correspond to the bits in the affinity mask, at
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| 50 | * least not until we've sorted out Windows NT. */
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| 51 | typedef RTHCUINTPTR RTCPUID;
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| 52 | /** Pointer to a CPU identifier. */
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| 53 | typedef RTCPUID *PRTCPUID;
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| 54 | /** Pointer to a const CPU identifier. */
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| 55 | typedef RTCPUID const *PCRTCPUID;
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| 56 | /** Nil CPU Id. */
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| 57 | #define NIL_RTCPUID ( (RTCPUID)~0 )
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| 58 |
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| 59 | /**
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| 60 | * Gets the identifier of the CPU executing the call.
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| 61 | *
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| 62 | * When called from a system mode where scheduling is active, like ring-3 or
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| 63 | * kernel mode with interrupts enabled on some systems, no assumptions should
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| 64 | * be made about the current CPU when the call returns.
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| 65 | *
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| 66 | * @returns CPU Id.
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| 67 | */
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| 68 | RTDECL(RTCPUID) RTMpCpuId(void);
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| 69 |
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| 70 | #ifdef IN_RING0
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| 71 |
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| 72 | /**
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| 73 | * Worker function passed to RTMpOnAll, RTMpOnOthers and RTMpOnSpecific that
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| 74 | * is to be called on the target cpus.
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| 75 | *
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| 76 | * @param idCpu The identifier for the CPU the function is called on.
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| 77 | * @param pvUser1 The 1st user argument.
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| 78 | * @param pvUser2 The 2nd user argument.
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| 79 | */
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| 80 | typedef DECLCALLBACK(void) FNRTMPWORKER(RTCPUID idCpu, void *pvUser1, void *pvUser2);
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| 81 | /** Pointer to a FNRTMPWORKER. */
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| 82 | typedef FNRTMPWORKER *PFNRTMPWORKER;
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| 83 |
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| 84 | /**
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| 85 | * Executes a function on each (online) CPU in the system.
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| 86 | *
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| 87 | * @returns IPRT status code.
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| 88 | * @retval VINF_SUCCESS on success.
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| 89 | * @retval VERR_NOT_SUPPORTED if this kind of operation isn't supported by the system.
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| 90 | *
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| 91 | * @param pfnWorker The worker function.
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| 92 | * @param pvUser1 The first user argument for the worker.
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| 93 | * @param pvUser2 The second user argument for the worker.
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| 94 | *
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| 95 | * @remarks The execution isn't in any way guaranteed to be simultaneous,
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| 96 | * it might even be serial (cpu by cpu).
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| 97 | */
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| 98 | RTDECL(int) RTMpOnAll(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2);
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| 99 |
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| 100 | /**
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| 101 | * Executes a function on a all other (online) CPUs in the system.
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| 102 | *
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| 103 | * @returns IPRT status code.
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| 104 | * @retval VINF_SUCCESS on success.
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| 105 | * @retval VERR_NOT_SUPPORTED if this kind of operation isn't supported by the system.
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| 106 | *
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| 107 | * @param pfnWorker The worker function.
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| 108 | * @param pvUser1 The first user argument for the worker.
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| 109 | * @param pvUser2 The second user argument for the worker.
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| 110 | *
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| 111 | * @remarks The execution isn't in any way guaranteed to be simultaneous,
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| 112 | * it might even be serial (cpu by cpu).
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| 113 | */
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| 114 | RTDECL(int) RTMpOnOthers(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2);
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| 115 |
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| 116 | /**
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| 117 | * Executes a function on a specific CPU in the system.
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| 118 | *
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| 119 | * @returns IPRT status code.
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| 120 | * @retval VINF_SUCCESS on success.
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| 121 | * @retval VERR_NOT_SUPPORTED if this kind of operation isn't supported by the system.
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| 122 | * @retval VERR_CPU_OFFLINE if the CPU is offline.
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| 123 | * @retval VERR_CPU_NOT_FOUND if the CPU wasn't found.
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| 124 | *
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| 125 | * @param idCpu The id of the CPU.
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| 126 | * @param pfnWorker The worker function.
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| 127 | * @param pvUser1 The first user argument for the worker.
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| 128 | * @param pvUser2 The second user argument for the worker.
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| 129 | */
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| 130 | RTDECL(int) RTMpOnSpecific(RTCPUID idCpu, PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2);
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| 131 |
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| 132 | #endif /* IN_RING0 */
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| 133 |
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| 134 | /** @} */
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| 135 |
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| 136 | __END_DECLS
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| 137 |
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| 138 | #endif
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| 139 |
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