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comparison src/os/aix/vm/threadCritical_aix.cpp @ 14415:666e6ce3976c

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8023038: PPC64 (part 15): Platform files for AIX/PPC64 support Reviewed-by: kvn
author simonis
date Fri, 06 Sep 2013 20:16:09 +0200
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children 71a71b0bc844
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14414:b83f7d608548 14415:666e6ce3976c
1 /*
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2012, 2013 SAP AG. 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 "thread_aix.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
37 static pthread_t tc_owner = 0;
38 static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
39 static int tc_count = 0;
40
41 void ThreadCritical::initialize() {
42 }
43
44 void ThreadCritical::release() {
45 }
46
47 ThreadCritical::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
58 ThreadCritical::~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 }