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1 /* |
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2 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include "Lock.h" |
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27 |
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28 |
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29 Lock::Lock(void) { |
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30 Initialize(); |
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31 } |
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32 |
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33 Lock::Lock(bool Value) { |
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34 Initialize(); |
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35 |
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36 if (Value == true) { |
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37 Enter(); |
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38 } |
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39 } |
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40 |
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41 void Lock::Initialize() { |
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42 #ifdef WINDOWS |
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43 InitializeCriticalSectionAndSpinCount(&FCriticalSection, 0x00000400); |
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44 #endif // WINDOWS |
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45 #ifdef MAC |
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46 // FMutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER; |
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47 #endif // MAC |
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48 #ifdef LINUX |
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49 // FMutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; |
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50 #endif // LINUX |
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51 } |
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52 |
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53 Lock::~Lock(void) { |
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54 #ifdef WINDOWS |
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55 DeleteCriticalSection(&FCriticalSection); |
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56 #endif // WINDOWS |
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57 #ifdef POSIX |
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58 pthread_mutex_unlock(&FMutex); |
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59 #endif // POSIX |
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60 } |
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61 |
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62 void Lock::Enter() { |
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63 #ifdef WINDOWS |
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64 EnterCriticalSection(&FCriticalSection); |
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65 #endif // WINDOWS |
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66 #ifdef POSIX |
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67 pthread_mutex_lock(&FMutex); |
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68 #endif // POSIX |
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69 } |
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70 |
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71 void Lock::Leave() { |
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72 #ifdef WINDOWS |
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73 LeaveCriticalSection(&FCriticalSection); |
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74 #endif // WINDOWS |
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75 #ifdef POSIX |
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76 pthread_mutex_unlock(&FMutex); |
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77 #endif // POSIX |
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78 } |
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79 |
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80 bool Lock::TryEnter() { |
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81 bool result = false; |
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82 #ifdef WINDOWS |
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83 if (TryEnterCriticalSection (&FCriticalSection) != 0) |
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84 result = true; |
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85 #endif // WINDOWS |
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86 #ifdef POSIX |
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87 if (pthread_mutex_lock(&FMutex) == 0) |
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88 result = true; |
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89 #endif // POSIX |
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90 return result; |
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91 } |