1 | /* $Id: semspinmutex-r3-generic.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Spinning Mutex Semaphores, Ring-3, Generic.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2015 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 <iprt/semaphore.h>
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32 | #include "internal/iprt.h"
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33 |
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34 | #include <iprt/alloc.h>
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35 | #include <iprt/err.h>
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36 | #include <iprt/assert.h>
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37 | #include <iprt/critsect.h>
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38 |
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39 |
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40 |
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41 | RTDECL(int) RTSemSpinMutexCreate(PRTSEMSPINMUTEX phSpinMtx, uint32_t fFlags)
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42 | {
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43 | AssertReturn(!(fFlags & ~RTSEMSPINMUTEX_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
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44 | AssertPtr(phSpinMtx);
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45 |
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46 | PRTCRITSECT pCritSect = (PRTCRITSECT)RTMemAlloc(sizeof(RTCRITSECT));
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47 | if (!pCritSect)
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48 | return VERR_NO_MEMORY;
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49 | int rc = RTCritSectInitEx(pCritSect, RTCRITSECT_FLAGS_NO_NESTING | RTCRITSECT_FLAGS_NO_LOCK_VAL,
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50 | NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, "RTSemSpinMutex");
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51 | if (RT_SUCCESS(rc))
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52 | *phSpinMtx = (RTSEMSPINMUTEX)pCritSect;
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53 | else
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54 | RTMemFree(pCritSect);
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55 | return rc;
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56 | }
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57 | RT_EXPORT_SYMBOL(RTSemSpinMutexCreate);
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58 |
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59 |
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60 | RTDECL(int) RTSemSpinMutexDestroy(RTSEMSPINMUTEX hSpinMtx)
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61 | {
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62 | if (hSpinMtx == NIL_RTSEMSPINMUTEX)
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63 | return VERR_INVALID_PARAMETER;
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64 | PRTCRITSECT pCritSect = (PRTCRITSECT)hSpinMtx;
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65 | int rc = RTCritSectDelete(pCritSect);
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66 | if (RT_SUCCESS(rc))
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67 | RTMemFree(pCritSect);
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68 | return rc;
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69 | }
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70 | RT_EXPORT_SYMBOL(RTSemSpinMutexDestroy);
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71 |
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72 |
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73 | RTDECL(int) RTSemSpinMutexTryRequest(RTSEMSPINMUTEX hSpinMtx)
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74 | {
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75 | return RTCritSectTryEnter((PRTCRITSECT)hSpinMtx);
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76 |
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77 | }
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78 | RT_EXPORT_SYMBOL(RTSemSpinMutexTryRequest);
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79 |
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80 |
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81 | RTDECL(int) RTSemSpinMutexRequest(RTSEMSPINMUTEX hSpinMtx)
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82 | {
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83 | return RTCritSectEnter((PRTCRITSECT)hSpinMtx);
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84 | }
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85 | RT_EXPORT_SYMBOL(RTSemSpinMutexRequest);
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86 |
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87 |
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88 | RTDECL(int) RTSemSpinMutexRelease(RTSEMSPINMUTEX hSpinMtx)
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89 | {
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90 | return RTCritSectLeave((PRTCRITSECT)hSpinMtx);
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91 | }
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92 | RT_EXPORT_SYMBOL(RTSemSpinMutexRelease);
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93 |
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