1 /* |
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2 * Copyright (c) 2001, 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. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef _MONITOR_ |
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26 #define _MONITOR_ |
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27 |
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28 #include <windows.h> |
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29 |
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30 class Monitor { |
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31 public: |
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32 Monitor(); |
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33 ~Monitor(); |
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34 |
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35 void lock(); |
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36 void unlock(); |
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37 // Default time is forever (i.e, zero). Returns true if it times-out, otherwise |
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38 // false. |
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39 bool wait(long timeout = 0); |
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40 bool notify(); |
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41 bool notifyAll(); |
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42 |
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43 private: |
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44 HANDLE owner(); |
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45 void setOwner(HANDLE owner); |
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46 bool ownedBySelf(); |
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47 |
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48 HANDLE _owner; |
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49 long _lock_count; |
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50 HANDLE _lock_event; // Auto-reset event for blocking in lock() |
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51 HANDLE _wait_event; // Manual-reset event for notifications |
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52 long _counter; // Current number of notifications |
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53 long _waiters; // Number of threads waiting for notification |
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54 long _tickets; // Number of waiters to be notified |
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55 }; |
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56 |
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57 |
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58 #endif // #defined _MONITOR_ |
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