duke@435: /*
stefank@2314:  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@4299: #include "runtime/thread.inline.hpp"
stefank@2314: #include "runtime/threadCritical.hpp"
duke@435: 
duke@435: // put OS-includes here
duke@435: # include <pthread.h>
duke@435: 
duke@435: //
duke@435: // See threadCritical.hpp for details of this class.
duke@435: //
duke@435: 
duke@435: static pthread_t             tc_owner = 0;
duke@435: static pthread_mutex_t       tc_mutex = PTHREAD_MUTEX_INITIALIZER;
duke@435: static int                   tc_count = 0;
duke@435: 
duke@435: void ThreadCritical::initialize() {
duke@435: }
duke@435: 
duke@435: void ThreadCritical::release() {
duke@435: }
duke@435: 
duke@435: ThreadCritical::ThreadCritical() {
duke@435:   pthread_t self = pthread_self();
duke@435:   if (self != tc_owner) {
duke@435:     int ret = pthread_mutex_lock(&tc_mutex);
duke@435:     guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
duke@435:     assert(tc_count == 0, "Lock acquired with illegal reentry count.");
duke@435:     tc_owner = self;
duke@435:   }
duke@435:   tc_count++;
duke@435: }
duke@435: 
duke@435: ThreadCritical::~ThreadCritical() {
duke@435:   assert(tc_owner == pthread_self(), "must have correct owner");
duke@435:   assert(tc_count > 0, "must have correct count");
duke@435: 
duke@435:   tc_count--;
duke@435:   if (tc_count == 0) {
duke@435:     tc_owner = 0;
duke@435:     int ret = pthread_mutex_unlock(&tc_mutex);
duke@435:     guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
duke@435:   }
duke@435: }