1 /*

     2  * Copyright 2001-2006 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_linux.cpp.incl"

    27 

    28 // put OS-includes here

    29 # include <pthread.h>

    30 

    31 //

    32 // See threadCritical.hpp for details of this class.

    33 //

    34 

    35 static pthread_t             tc_owner = 0;

    36 static pthread_mutex_t       tc_mutex = PTHREAD_MUTEX_INITIALIZER;

    37 static int                   tc_count = 0;

    38 

    39 void ThreadCritical::initialize() {

    40 }

    41 

    42 void ThreadCritical::release() {

    43 }

    44 

    45 ThreadCritical::ThreadCritical() {

    46   pthread_t self = pthread_self();

    47   if (self != tc_owner) {

    48     int ret = pthread_mutex_lock(&tc_mutex);

    49     guarantee(ret == 0, "fatal error with pthread_mutex_lock()");

    50     assert(tc_count == 0, "Lock acquired with illegal reentry count.");

    51     tc_owner = self;

    52   }

    53   tc_count++;

    54 }

    55 

    56 ThreadCritical::~ThreadCritical() {

    57   assert(tc_owner == pthread_self(), "must have correct owner");

    58   assert(tc_count > 0, "must have correct count");

    59 

    60   tc_count--;

    61   if (tc_count == 0) {

    62     tc_owner = 0;

    63     int ret = pthread_mutex_unlock(&tc_mutex);

    64     guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");

    65   }

    66 }