Thu, 24 May 2018 17:06:56 +0800
Merge
1 /*
2 * Copyright (c) 2001, 2010, 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 */
25 #include "precompiled.hpp"
26 #include "runtime/thread.inline.hpp"
27 #include "runtime/threadCritical.hpp"
29 // put OS-includes here
30 # include <pthread.h>
32 //
33 // See threadCritical.hpp for details of this class.
34 //
36 static pthread_t tc_owner = 0;
37 static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
38 static int tc_count = 0;
40 void ThreadCritical::initialize() {
41 }
43 void ThreadCritical::release() {
44 }
46 ThreadCritical::ThreadCritical() {
47 pthread_t self = pthread_self();
48 if (self != tc_owner) {
49 int ret = pthread_mutex_lock(&tc_mutex);
50 guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
51 assert(tc_count == 0, "Lock acquired with illegal reentry count.");
52 tc_owner = self;
53 }
54 tc_count++;
55 }
57 ThreadCritical::~ThreadCritical() {
58 assert(tc_owner == pthread_self(), "must have correct owner");
59 assert(tc_count > 0, "must have correct count");
61 tc_count--;
62 if (tc_count == 0) {
63 tc_owner = 0;
64 int ret = pthread_mutex_unlock(&tc_mutex);
65 guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
66 }
67 }