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/*
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "runtime/threadCritical.hpp"
#include "thread_linux.inline.hpp"
// put OS-includes here
# include <pthread.h>
//
// See threadCritical.hpp for details of this class.
//
static pthread_t tc_owner = 0;
static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
static int tc_count = 0;
void ThreadCritical::initialize() {
}
void ThreadCritical::release() {
}
ThreadCritical::ThreadCritical() {
pthread_t self = pthread_self();
if (self != tc_owner) {
int ret = pthread_mutex_lock(&tc_mutex);
guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
assert(tc_count == 0, "Lock acquired with illegal reentry count.");
tc_owner = self;
}
tc_count++;
}
ThreadCritical::~ThreadCritical() {
assert(tc_owner == pthread_self(), "must have correct owner");
assert(tc_count > 0, "must have correct count");
tc_count--;
if (tc_count == 0) {
tc_owner = 0;
int ret = pthread_mutex_unlock(&tc_mutex);
guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
}
}
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