Thu, 24 May 2018 17:06:56 +0800
Merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "runtime/thread.inline.hpp" |
aoqi@0 | 27 | #include "runtime/threadCritical.hpp" |
aoqi@0 | 28 | |
aoqi@0 | 29 | // put OS-includes here |
aoqi@0 | 30 | # include <pthread.h> |
aoqi@0 | 31 | |
aoqi@0 | 32 | // |
aoqi@0 | 33 | // See threadCritical.hpp for details of this class. |
aoqi@0 | 34 | // |
aoqi@0 | 35 | |
aoqi@0 | 36 | static pthread_t tc_owner = 0; |
aoqi@0 | 37 | static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER; |
aoqi@0 | 38 | static int tc_count = 0; |
aoqi@0 | 39 | |
aoqi@0 | 40 | void ThreadCritical::initialize() { |
aoqi@0 | 41 | } |
aoqi@0 | 42 | |
aoqi@0 | 43 | void ThreadCritical::release() { |
aoqi@0 | 44 | } |
aoqi@0 | 45 | |
aoqi@0 | 46 | ThreadCritical::ThreadCritical() { |
aoqi@0 | 47 | pthread_t self = pthread_self(); |
aoqi@0 | 48 | if (self != tc_owner) { |
aoqi@0 | 49 | int ret = pthread_mutex_lock(&tc_mutex); |
aoqi@0 | 50 | guarantee(ret == 0, "fatal error with pthread_mutex_lock()"); |
aoqi@0 | 51 | assert(tc_count == 0, "Lock acquired with illegal reentry count."); |
aoqi@0 | 52 | tc_owner = self; |
aoqi@0 | 53 | } |
aoqi@0 | 54 | tc_count++; |
aoqi@0 | 55 | } |
aoqi@0 | 56 | |
aoqi@0 | 57 | ThreadCritical::~ThreadCritical() { |
aoqi@0 | 58 | assert(tc_owner == pthread_self(), "must have correct owner"); |
aoqi@0 | 59 | assert(tc_count > 0, "must have correct count"); |
aoqi@0 | 60 | |
aoqi@0 | 61 | tc_count--; |
aoqi@0 | 62 | if (tc_count == 0) { |
aoqi@0 | 63 | tc_owner = 0; |
aoqi@0 | 64 | int ret = pthread_mutex_unlock(&tc_mutex); |
aoqi@0 | 65 | guarantee(ret == 0, "fatal error with pthread_mutex_unlock()"); |
aoqi@0 | 66 | } |
aoqi@0 | 67 | } |