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1 /*
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2 * Copyright 2001-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_threadCritical_linux.cpp.incl"
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27
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28 // put OS-includes here
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29 # include <pthread.h>
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30
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31 //
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32 // See threadCritical.hpp for details of this class.
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33 //
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34
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35 static pthread_t tc_owner = 0;
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36 static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
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37 static int tc_count = 0;
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38
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39 void ThreadCritical::initialize() {
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40 }
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41
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42 void ThreadCritical::release() {
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43 }
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44
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45 ThreadCritical::ThreadCritical() {
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46 pthread_t self = pthread_self();
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47 if (self != tc_owner) {
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48 int ret = pthread_mutex_lock(&tc_mutex);
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49 guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
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50 assert(tc_count == 0, "Lock acquired with illegal reentry count.");
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51 tc_owner = self;
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52 }
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53 tc_count++;
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54 }
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55
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56 ThreadCritical::~ThreadCritical() {
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57 assert(tc_owner == pthread_self(), "must have correct owner");
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58 assert(tc_count > 0, "must have correct count");
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59
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60 tc_count--;
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61 if (tc_count == 0) {
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62 tc_owner = 0;
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63 int ret = pthread_mutex_unlock(&tc_mutex);
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64 guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
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65 }
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66 }
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