| 1 | /* $Id: semfastmutex-r0drv-solaris.c 62477 2016-07-22 18:27:37Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Fast Mutex Semaphores, Ring-0 Driver, Solaris.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2016 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include "the-solaris-kernel.h"
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| 32 | #include "internal/iprt.h"
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| 33 | #include <iprt/semaphore.h>
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| 34 |
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| 35 | #include <iprt/asm.h>
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| 36 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 37 | # include <iprt/asm-amd64-x86.h>
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| 38 | #endif
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| 39 | #include <iprt/assert.h>
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| 40 | #include <iprt/err.h>
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| 41 | #include <iprt/mem.h>
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| 42 | #include <iprt/thread.h>
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| 43 | #include "internal/magics.h"
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| 44 |
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| 45 |
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| 46 | /*********************************************************************************************************************************
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| 47 | * Structures and Typedefs *
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| 48 | *********************************************************************************************************************************/
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| 49 | /**
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| 50 | * Wrapper for the Solaris mutex.
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| 51 | */
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| 52 | typedef struct RTSEMFASTMUTEXINTERNAL
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| 53 | {
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| 54 | /** Magic value (RTSEMFASTMUTEX_MAGIC). */
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| 55 | uint32_t u32Magic;
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| 56 | /** The Solaris mutex. */
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| 57 | krwlock_t Mtx;
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| 58 | } RTSEMFASTMUTEXINTERNAL, *PRTSEMFASTMUTEXINTERNAL;
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| 59 |
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| 60 |
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| 61 |
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| 62 | RTDECL(int) RTSemFastMutexCreate(PRTSEMFASTMUTEX phFastMtx)
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| 63 | {
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| 64 | AssertCompile(sizeof(RTSEMFASTMUTEXINTERNAL) > sizeof(void *));
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| 65 | AssertPtrReturn(phFastMtx, VERR_INVALID_POINTER);
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| 66 | RT_ASSERT_PREEMPTIBLE();
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| 67 |
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| 68 | PRTSEMFASTMUTEXINTERNAL pThis = (PRTSEMFASTMUTEXINTERNAL)RTMemAlloc(sizeof(*pThis));
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| 69 | if (pThis)
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| 70 | {
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| 71 | pThis->u32Magic = RTSEMFASTMUTEX_MAGIC;
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| 72 | rw_init (&pThis->Mtx, "RWLOCK", RW_DRIVER, NULL);
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| 73 |
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| 74 | *phFastMtx = pThis;
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| 75 | return VINF_SUCCESS;
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| 76 | }
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| 77 | return VERR_NO_MEMORY;
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| 78 | }
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| 79 |
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| 80 |
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| 81 | RTDECL(int) RTSemFastMutexDestroy(RTSEMFASTMUTEX hFastMtx)
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| 82 | {
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| 83 | PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
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| 84 | if (pThis == NIL_RTSEMFASTMUTEX)
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| 85 | return VINF_SUCCESS;
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| 86 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 87 | AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
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| 88 | RT_ASSERT_INTS_ON();
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| 89 |
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| 90 | ASMAtomicXchgU32(&pThis->u32Magic, RTSEMFASTMUTEX_MAGIC_DEAD);
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| 91 | rw_destroy(&pThis->Mtx);
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| 92 | RTMemFree(pThis);
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| 93 |
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| 94 | return VINF_SUCCESS;
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| 95 | }
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| 96 |
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| 97 |
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| 98 | RTDECL(int) RTSemFastMutexRequest(RTSEMFASTMUTEX hFastMtx)
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| 99 | {
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| 100 | PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
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| 101 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 102 | AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
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| 103 | RT_ASSERT_PREEMPTIBLE();
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| 104 |
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| 105 | rw_enter(&pThis->Mtx, RW_WRITER);
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| 106 | return VINF_SUCCESS;
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| 107 | }
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| 108 |
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| 109 |
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| 110 | RTDECL(int) RTSemFastMutexRelease(RTSEMFASTMUTEX hFastMtx)
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| 111 | {
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| 112 | PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
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| 113 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 114 | AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
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| 115 | RT_ASSERT_INTS_ON();
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| 116 |
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| 117 | rw_exit(&pThis->Mtx);
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| 118 | return VINF_SUCCESS;
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| 119 | }
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| 120 |
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