1 /* 2 * Copyright (c) 2001, 2006, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_threadCritical_linux.cpp.incl" 27 28 // put OS-includes here 29 # include <pthread.h> 30 31 // 32 // See threadCritical.hpp for details of this class. 33 // 34 35 static pthread_t tc_owner = 0; 36 static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER; 37 static int tc_count = 0; 38 39 void ThreadCritical::initialize() { 40 } 41 42 void ThreadCritical::release() { 43 } 44 45 ThreadCritical::ThreadCritical() { 46 pthread_t self = pthread_self(); 47 if (self != tc_owner) { 48 int ret = pthread_mutex_lock(&tc_mutex); 49 guarantee(ret == 0, "fatal error with pthread_mutex_lock()"); 50 assert(tc_count == 0, "Lock acquired with illegal reentry count."); 51 tc_owner = self; 52 } 53 tc_count++; 54 } 55 56 ThreadCritical::~ThreadCritical() { 57 assert(tc_owner == pthread_self(), "must have correct owner"); 58 assert(tc_count > 0, "must have correct count"); 59 60 tc_count--; 61 if (tc_count == 0) { 62 tc_owner = 0; 63 int ret = pthread_mutex_unlock(&tc_mutex); 64 guarantee(ret == 0, "fatal error with pthread_mutex_unlock()"); 65 } 66 }