Mercurial > hg > truffle
diff src/os/linux/vm/threadCritical_linux.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os/linux/vm/threadCritical_linux.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,66 @@ +/* + * Copyright 2001-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_threadCritical_linux.cpp.incl" + +// put OS-includes here +# include <pthread.h> + +// +// See threadCritical.hpp for details of this class. +// + +static pthread_t tc_owner = 0; +static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER; +static int tc_count = 0; + +void ThreadCritical::initialize() { +} + +void ThreadCritical::release() { +} + +ThreadCritical::ThreadCritical() { + pthread_t self = pthread_self(); + if (self != tc_owner) { + int ret = pthread_mutex_lock(&tc_mutex); + guarantee(ret == 0, "fatal error with pthread_mutex_lock()"); + assert(tc_count == 0, "Lock acquired with illegal reentry count."); + tc_owner = self; + } + tc_count++; +} + +ThreadCritical::~ThreadCritical() { + assert(tc_owner == pthread_self(), "must have correct owner"); + assert(tc_count > 0, "must have correct count"); + + tc_count--; + if (tc_count == 0) { + tc_owner = 0; + int ret = pthread_mutex_unlock(&tc_mutex); + guarantee(ret == 0, "fatal error with pthread_mutex_unlock()"); + } +}