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annotate src/os/aix/vm/threadCritical_aix.cpp @ 21947:9f70fc90169d

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Truffle: remove expensive assertion
author Andreas Woess <andreas.woess@oracle.com>
date Wed, 17 Jun 2015 04:09:30 +0200
parents 71a71b0bc844
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2012, 2014 SAP AG. All rights reserved.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #include "precompiled.hpp"
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27 #include "runtime/threadCritical.hpp"
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28 #include "runtime/thread.inline.hpp"
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29
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30 // put OS-includes here
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31 # include <pthread.h>
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32
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33 //
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34 // See threadCritical.hpp for details of this class.
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35 //
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36
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37 static pthread_t tc_owner = 0;
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38 static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
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39 static int tc_count = 0;
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40
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41 void ThreadCritical::initialize() {
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42 }
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43
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44 void ThreadCritical::release() {
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45 }
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46
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47 ThreadCritical::ThreadCritical() {
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48 pthread_t self = pthread_self();
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49 if (self != tc_owner) {
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50 int ret = pthread_mutex_lock(&tc_mutex);
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51 guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
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52 assert(tc_count == 0, "Lock acquired with illegal reentry count.");
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53 tc_owner = self;
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54 }
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55 tc_count++;
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56 }
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57
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58 ThreadCritical::~ThreadCritical() {
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59 assert(tc_owner == pthread_self(), "must have correct owner");
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60 assert(tc_count > 0, "must have correct count");
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61
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62 tc_count--;
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63 if (tc_count == 0) {
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64 tc_owner = 0;
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65 int ret = pthread_mutex_unlock(&tc_mutex);
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66 guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
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67 }
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68 }