1 | /* $Id: semfastmutex-r0drv-solaris.c 76553 2019-01-01 01:45:53Z 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) 2006-2019 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/errcore.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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