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src/os/aix/vm/threadCritical_aix.cpp@71a71b0bc844 (annotated)

src/os/aix/vm/threadCritical_aix.cpp

Thu, 20 Mar 2014 11:03:06 +0100

author

goetz

date

Thu, 20 Mar 2014 11:03:06 +0100

changeset 6515

71a71b0bc844

parent 6465

666e6ce3976c

child 6876

710a3c8b516e

permissions

-rw-r--r--

8037915: PPC64/AIX: Several smaller fixes
Reviewed-by: kvn

simonis@6465	1	/*
simonis@6465	2	* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
goetz@6515	3	* Copyright 2012, 2014 SAP AG. All rights reserved.
simonis@6465	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
simonis@6465	5	*
simonis@6465	6	* This code is free software; you can redistribute it and/or modify it
simonis@6465	7	* under the terms of the GNU General Public License version 2 only, as
simonis@6465	8	* published by the Free Software Foundation.
simonis@6465	9	*
simonis@6465	10	* This code is distributed in the hope that it will be useful, but WITHOUT
simonis@6465	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
simonis@6465	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
simonis@6465	13	* version 2 for more details (a copy is included in the LICENSE file that
simonis@6465	14	* accompanied this code).
simonis@6465	15	*
simonis@6465	16	* You should have received a copy of the GNU General Public License version
simonis@6465	17	* 2 along with this work; if not, write to the Free Software Foundation,
simonis@6465	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
simonis@6465	19	*
simonis@6465	20	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
simonis@6465	21	* or visit www.oracle.com if you need additional information or have any
simonis@6465	22	* questions.
simonis@6465	23	*
simonis@6465	24	*/
simonis@6465	25
simonis@6465	26	#include "precompiled.hpp"
simonis@6465	27	#include "runtime/threadCritical.hpp"
goetz@6515	28	#include "runtime/thread.inline.hpp"
simonis@6465	29
simonis@6465	30	// put OS-includes here
simonis@6465	31	# include <pthread.h>
simonis@6465	32
simonis@6465	33	//
simonis@6465	34	// See threadCritical.hpp for details of this class.
simonis@6465	35	//
simonis@6465	36
simonis@6465	37	static pthread_t tc_owner = 0;
simonis@6465	38	static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
simonis@6465	39	static int tc_count = 0;
simonis@6465	40
simonis@6465	41	void ThreadCritical::initialize() {
simonis@6465	42	}
simonis@6465	43
simonis@6465	44	void ThreadCritical::release() {
simonis@6465	45	}
simonis@6465	46
simonis@6465	47	ThreadCritical::ThreadCritical() {
simonis@6465	48	pthread_t self = pthread_self();
simonis@6465	49	if (self != tc_owner) {
simonis@6465	50	int ret = pthread_mutex_lock(&tc_mutex);
simonis@6465	51	guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
simonis@6465	52	assert(tc_count == 0, "Lock acquired with illegal reentry count.");
simonis@6465	53	tc_owner = self;
simonis@6465	54	}
simonis@6465	55	tc_count++;
simonis@6465	56	}
simonis@6465	57
simonis@6465	58	ThreadCritical::~ThreadCritical() {
simonis@6465	59	assert(tc_owner == pthread_self(), "must have correct owner");
simonis@6465	60	assert(tc_count > 0, "must have correct count");
simonis@6465	61
simonis@6465	62	tc_count--;
simonis@6465	63	if (tc_count == 0) {
simonis@6465	64	tc_owner = 0;
simonis@6465	65	int ret = pthread_mutex_unlock(&tc_mutex);
simonis@6465	66	guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
simonis@6465	67	}
simonis@6465	68	}