simonis@6465: /*
simonis@6465:  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
goetz@6515:  * Copyright 2012, 2014 SAP AG. All rights reserved.
simonis@6465:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
simonis@6465:  *
simonis@6465:  * This code is free software; you can redistribute it and/or modify it
simonis@6465:  * under the terms of the GNU General Public License version 2 only, as
simonis@6465:  * published by the Free Software Foundation.
simonis@6465:  *
simonis@6465:  * This code is distributed in the hope that it will be useful, but WITHOUT
simonis@6465:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
simonis@6465:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
simonis@6465:  * version 2 for more details (a copy is included in the LICENSE file that
simonis@6465:  * accompanied this code).
simonis@6465:  *
simonis@6465:  * You should have received a copy of the GNU General Public License version
simonis@6465:  * 2 along with this work; if not, write to the Free Software Foundation,
simonis@6465:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
simonis@6465:  *
simonis@6465:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
simonis@6465:  * or visit www.oracle.com if you need additional information or have any
simonis@6465:  * questions.
simonis@6465:  *
simonis@6465:  */
simonis@6465: 
simonis@6465: #include "precompiled.hpp"
simonis@6465: #include "runtime/threadCritical.hpp"
goetz@6515: #include "runtime/thread.inline.hpp"
simonis@6465: 
simonis@6465: // put OS-includes here
simonis@6465: # include <pthread.h>
simonis@6465: 
simonis@6465: //
simonis@6465: // See threadCritical.hpp for details of this class.
simonis@6465: //
simonis@6465: 
simonis@6465: static pthread_t             tc_owner = 0;
simonis@6465: static pthread_mutex_t       tc_mutex = PTHREAD_MUTEX_INITIALIZER;
simonis@6465: static int                   tc_count = 0;
simonis@6465: 
simonis@6465: void ThreadCritical::initialize() {
simonis@6465: }
simonis@6465: 
simonis@6465: void ThreadCritical::release() {
simonis@6465: }
simonis@6465: 
simonis@6465: ThreadCritical::ThreadCritical() {
simonis@6465:   pthread_t self = pthread_self();
simonis@6465:   if (self != tc_owner) {
simonis@6465:     int ret = pthread_mutex_lock(&tc_mutex);
simonis@6465:     guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
simonis@6465:     assert(tc_count == 0, "Lock acquired with illegal reentry count.");
simonis@6465:     tc_owner = self;
simonis@6465:   }
simonis@6465:   tc_count++;
simonis@6465: }
simonis@6465: 
simonis@6465: ThreadCritical::~ThreadCritical() {
simonis@6465:   assert(tc_owner == pthread_self(), "must have correct owner");
simonis@6465:   assert(tc_count > 0, "must have correct count");
simonis@6465: 
simonis@6465:   tc_count--;
simonis@6465:   if (tc_count == 0) {
simonis@6465:     tc_owner = 0;
simonis@6465:     int ret = pthread_mutex_unlock(&tc_mutex);
simonis@6465:     guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
simonis@6465:   }
simonis@6465: }