| /* |
| * 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/thread.inline.hpp" |
| #include "runtime/threadCritical.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() { |
| } |