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comparison src/os/solaris/vm/threadCritical_solaris.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children f03d0a26bf83
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2001-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_threadCritical_solaris.cpp.incl"
27
28 // OS-includes here
29 #include <thread.h>
30 #include <synch.h>
31
32 //
33 // See threadCritical.hpp for details of this class.
34 //
35 // For some reason, we don't do locking until the
36 // os::init() call completes. I'm not sure why this
37 // is, and have left it that way for now. This should
38 // be reviewed later.
39
40 static mutex_t global_mut;
41 static thread_t global_mut_owner = -1;
42 static int global_mut_count = 0;
43 static bool initialized = false;
44
45 ThreadCritical::ThreadCritical() {
46 if (initialized) {
47 thread_t owner = thr_self();
48 if (global_mut_owner != owner) {
49 if (os::Solaris::mutex_lock(&global_mut))
50 fatal1("ThreadCritical::ThreadCritical: mutex_lock failed (%s)", strerror(errno));
51 assert(global_mut_count == 0, "must have clean count");
52 assert(global_mut_owner == -1, "must have clean owner");
53 }
54 global_mut_owner = owner;
55 ++global_mut_count;
56 } else {
57 assert (Threads::number_of_threads() == 0, "valid only during initialization");
58 }
59 }
60
61 ThreadCritical::~ThreadCritical() {
62 if (initialized) {
63 assert(global_mut_owner == thr_self(), "must have correct owner");
64 assert(global_mut_count > 0, "must have correct count");
65 --global_mut_count;
66 if (global_mut_count == 0) {
67 global_mut_owner = -1;
68 if (os::Solaris::mutex_unlock(&global_mut))
69 fatal1("ThreadCritical::~ThreadCritical: mutex_unlock failed (%s)", strerror(errno));
70 }
71 } else {
72 assert (Threads::number_of_threads() == 0, "valid only during initialization");
73 }
74 }
75
76 void ThreadCritical::initialize() {
77 // This method is called at the end of os::init(). Until
78 // then, we don't do real locking.
79 initialized = true;
80 }
81
82 void ThreadCritical::release() {
83 }