/*
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "runtime/threadCritical.hpp"
#include "thread_solaris.inline.hpp"
// OS-includes here
#include <thread.h>
#include <synch.h>
//
// See threadCritical.hpp for details of this class.
//
// For some reason, we don't do locking until the
// os::init() call completes. I'm not sure why this
// is, and have left it that way for now. This should
// be reviewed later.
static mutex_t global_mut;
static thread_t global_mut_owner = -1;
static int global_mut_count = 0;
static bool initialized = false;
ThreadCritical::ThreadCritical() {
if (initialized) {
thread_t owner = thr_self();
if (global_mut_owner != owner) {
if (os::Solaris::mutex_lock(&global_mut))
fatal(err_msg("ThreadCritical::ThreadCritical: mutex_lock failed (%s)",
strerror(errno)));
assert(global_mut_count == 0, "must have clean count");
assert(global_mut_owner == -1, "must have clean owner");
}
global_mut_owner = owner;
++global_mut_count;
} else {
assert (Threads::number_of_threads() == 0, "valid only during initialization");
}
}
ThreadCritical::~ThreadCritical() {
if (initialized) {
assert(global_mut_owner == thr_self(), "must have correct owner");
assert(global_mut_count > 0, "must have correct count");
--global_mut_count;
if (global_mut_count == 0) {
global_mut_owner = -1;
if (os::Solaris::mutex_unlock(&global_mut))
fatal(err_msg("ThreadCritical::~ThreadCritical: mutex_unlock failed "
"(%s)", strerror(errno)));
}
} else {
assert (Threads::number_of_threads() == 0, "valid only during initialization");
}
}
void ThreadCritical::initialize() {
// This method is called at the end of os::init(). Until
// then, we don't do real locking.
initialized = true;
}
void ThreadCritical::release() {
}