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src/os/bsd/vm/threadCritical_bsd.cpp@710a3c8b516e (annotated)

src/os/bsd/vm/threadCritical_bsd.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 4299

f34d701e952e

parent 0

f90c822e73f8

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "runtime/thread.inline.hpp"
aoqi@0	27	#include "runtime/threadCritical.hpp"
aoqi@0	28
aoqi@0	29	// put OS-includes here
aoqi@0	30	# include <pthread.h>
aoqi@0	31
aoqi@0	32	//
aoqi@0	33	// See threadCritical.hpp for details of this class.
aoqi@0	34	//
aoqi@0	35
aoqi@0	36	static pthread_t tc_owner = 0;
aoqi@0	37	static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
aoqi@0	38	static int tc_count = 0;
aoqi@0	39
aoqi@0	40	void ThreadCritical::initialize() {
aoqi@0	41	}
aoqi@0	42
aoqi@0	43	void ThreadCritical::release() {
aoqi@0	44	}
aoqi@0	45
aoqi@0	46	ThreadCritical::ThreadCritical() {
aoqi@0	47	pthread_t self = pthread_self();
aoqi@0	48	if (self != tc_owner) {
aoqi@0	49	int ret = pthread_mutex_lock(&tc_mutex);
aoqi@0	50	guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
aoqi@0	51	assert(tc_count == 0, "Lock acquired with illegal reentry count.");
aoqi@0	52	tc_owner = self;
aoqi@0	53	}
aoqi@0	54	tc_count++;
aoqi@0	55	}
aoqi@0	56
aoqi@0	57	ThreadCritical::~ThreadCritical() {
aoqi@0	58	assert(tc_owner == pthread_self(), "must have correct owner");
aoqi@0	59	assert(tc_count > 0, "must have correct count");
aoqi@0	60
aoqi@0	61	tc_count--;
aoqi@0	62	if (tc_count == 0) {
aoqi@0	63	tc_owner = 0;
aoqi@0	64	int ret = pthread_mutex_unlock(&tc_mutex);
aoqi@0	65	guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
aoqi@0	66	}
aoqi@0	67	}