jdk8-mips64-public/hotspot: src/os/solaris/vm/threadCritical

     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

     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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

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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 }

src/os/solaris/vm/threadCritical_solaris.cpp@f73af4455d7d