1/* 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2014 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#include "precompiled.hpp" 27#include "runtime/threadCritical.hpp" 28#include "runtime/thread.inline.hpp" 29 30// put OS-includes here 31# include <pthread.h> 32 33// 34// See threadCritical.hpp for details of this class. 35// 36 37static pthread_t tc_owner = 0; 38static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER; 39static int tc_count = 0; 40 41void ThreadCritical::initialize() { 42} 43 44void ThreadCritical::release() { 45} 46 47ThreadCritical::ThreadCritical() { 48 pthread_t self = pthread_self(); 49 if (self != tc_owner) { 50 int ret = pthread_mutex_lock(&tc_mutex); 51 guarantee(ret == 0, "fatal error with pthread_mutex_lock()"); 52 assert(tc_count == 0, "Lock acquired with illegal reentry count."); 53 tc_owner = self; 54 } 55 tc_count++; 56} 57 58ThreadCritical::~ThreadCritical() { 59 assert(tc_owner == pthread_self(), "must have correct owner"); 60 assert(tc_count > 0, "must have correct count"); 61 62 tc_count--; 63 if (tc_count == 0) { 64 tc_owner = 0; 65 int ret = pthread_mutex_unlock(&tc_mutex); 66 guarantee(ret == 0, "fatal error with pthread_mutex_unlock()"); 67 } 68} 69