| 1 | /** @file
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| 2 | *
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| 3 | * AutoWriteLock/AutoReadLock: smart R/W semaphore wrappers
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2008 Sun Microsystems, Inc.
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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 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 18 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 19 | * additional information or have any questions.
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| 20 | */
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| 21 |
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| 22 | #include "AutoLock.h"
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| 23 |
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| 24 | #include "Logging.h"
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| 25 |
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| 26 | #include <iprt/string.h>
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| 27 |
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| 28 |
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| 29 | namespace util
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| 30 | {
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| 31 |
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| 32 | ////////////////////////////////////////////////////////////////////////////////
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| 33 | //
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| 34 | // RWLockHandle
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| 35 | //
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| 36 | ////////////////////////////////////////////////////////////////////////////////
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| 37 |
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| 38 | RWLockHandle::RWLockHandle()
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| 39 | {
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| 40 | int vrc = RTSemRWCreate (&mSemRW);
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| 41 | AssertRC (vrc);
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| 42 | }
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| 43 |
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| 44 |
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| 45 | RWLockHandle::~RWLockHandle()
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| 46 | {
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| 47 | RTSemRWDestroy (mSemRW);
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| 48 | }
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| 49 |
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| 50 |
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| 51 | bool RWLockHandle::isWriteLockOnCurrentThread() const
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| 52 | {
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| 53 | return RTSemRWIsWriteOwner (mSemRW);
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| 54 | }
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| 55 |
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| 56 |
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| 57 | void RWLockHandle::lockWrite()
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| 58 | {
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| 59 | int vrc = RTSemRWRequestWrite (mSemRW, RT_INDEFINITE_WAIT);
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| 60 | AssertRC (vrc);
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| 61 | }
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| 62 |
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| 63 |
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| 64 | void RWLockHandle::unlockWrite()
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| 65 | {
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| 66 | int vrc = RTSemRWReleaseWrite (mSemRW);
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| 67 | AssertRC (vrc);
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| 68 | }
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| 69 |
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| 70 |
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| 71 | void RWLockHandle::lockRead()
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| 72 | {
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| 73 | int vrc = RTSemRWRequestRead (mSemRW, RT_INDEFINITE_WAIT);
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| 74 | AssertRC (vrc);
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| 75 | }
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| 76 |
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| 77 |
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| 78 | void RWLockHandle::unlockRead()
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| 79 | {
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| 80 | int vrc = RTSemRWReleaseRead (mSemRW);
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| 81 | AssertRC (vrc);
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| 82 | }
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| 83 |
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| 84 |
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| 85 | uint32_t RWLockHandle::writeLockLevel() const
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| 86 | {
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| 87 | return RTSemRWGetWriteRecursion (mSemRW);
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| 88 | }
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| 89 |
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| 90 | } /* namespace util */
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| 91 | /* vi: set tabstop=4 shiftwidth=4 expandtab: */
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