63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
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* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2014 SAP SE. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "runtime/threadCritical.hpp"
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#include "runtime/thread.inline.hpp"
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// put OS-includes here
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# include <pthread.h>
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//
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// See threadCritical.hpp for details of this class.
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//
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static pthread_t tc_owner = 0;
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static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
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static int tc_count = 0;
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ThreadCritical::ThreadCritical() {
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pthread_t self = pthread_self();
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if (self != tc_owner) {
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int ret = pthread_mutex_lock(&tc_mutex);
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guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
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assert(tc_count == 0, "Lock acquired with illegal reentry count.");
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tc_owner = self;
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}
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tc_count++;
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}
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ThreadCritical::~ThreadCritical() {
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assert(tc_owner == pthread_self(), "must have correct owner");
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assert(tc_count > 0, "must have correct count");
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tc_count--;
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if (tc_count == 0) {
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tc_owner = 0;
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int ret = pthread_mutex_unlock(&tc_mutex);
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guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
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}
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}
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