hotspot/src/os/linux/vm/threadCritical_linux.cpp
changeset 1 489c9b5090e2
child 5547 f4b087cbb361
equal deleted inserted replaced
0:fd16c54261b3 1:489c9b5090e2
       
     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 }