Thu, 04 Apr 2013 10:01:26 -0700
8003310: Enable -Wunused-function when compiling with gcc
Summary: Add the -Wunused-function flag and remove a number of unused functions.
Reviewed-by: dholmes, coleenp, kvn
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
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #include "precompiled.hpp"
26 #include "runtime/thread.inline.hpp"
27 #include "runtime/threadCritical.hpp"
29 // OS-includes here
30 #include <thread.h>
31 #include <synch.h>
33 //
34 // See threadCritical.hpp for details of this class.
35 //
36 // For some reason, we don't do locking until the
37 // os::init() call completes. I'm not sure why this
38 // is, and have left it that way for now. This should
39 // be reviewed later.
41 static mutex_t global_mut;
42 static thread_t global_mut_owner = -1;
43 static int global_mut_count = 0;
44 static bool initialized = false;
46 ThreadCritical::ThreadCritical() {
47 if (initialized) {
48 thread_t owner = thr_self();
49 if (global_mut_owner != owner) {
50 if (os::Solaris::mutex_lock(&global_mut))
51 fatal(err_msg("ThreadCritical::ThreadCritical: mutex_lock failed (%s)",
52 strerror(errno)));
53 assert(global_mut_count == 0, "must have clean count");
54 assert(global_mut_owner == -1, "must have clean owner");
55 }
56 global_mut_owner = owner;
57 ++global_mut_count;
58 } else {
59 assert (Threads::number_of_threads() == 0, "valid only during initialization");
60 }
61 }
63 ThreadCritical::~ThreadCritical() {
64 if (initialized) {
65 assert(global_mut_owner == thr_self(), "must have correct owner");
66 assert(global_mut_count > 0, "must have correct count");
67 --global_mut_count;
68 if (global_mut_count == 0) {
69 global_mut_owner = -1;
70 if (os::Solaris::mutex_unlock(&global_mut))
71 fatal(err_msg("ThreadCritical::~ThreadCritical: mutex_unlock failed "
72 "(%s)", strerror(errno)));
73 }
74 } else {
75 assert (Threads::number_of_threads() == 0, "valid only during initialization");
76 }
77 }
79 void ThreadCritical::initialize() {
80 // This method is called at the end of os::init(). Until
81 // then, we don't do real locking.
82 initialized = true;
83 }
85 void ThreadCritical::release() {
86 }