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src/os/solaris/vm/threadCritical_solaris.cpp@7ae4e26cb1e0 (annotated)

src/os/solaris/vm/threadCritical_solaris.cpp

Thu, 12 Oct 2017 21:27:07 +0800

author

aoqi

date

Thu, 12 Oct 2017 21:27:07 +0800

changeset 7535

7ae4e26cb1e0

parent 6876

710a3c8b516e

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	// OS-includes here
aoqi@0	30	#include <thread.h>
aoqi@0	31	#include <synch.h>
aoqi@0	32
aoqi@0	33	//
aoqi@0	34	// See threadCritical.hpp for details of this class.
aoqi@0	35	//
aoqi@0	36	// For some reason, we don't do locking until the
aoqi@0	37	// os::init() call completes. I'm not sure why this
aoqi@0	38	// is, and have left it that way for now. This should
aoqi@0	39	// be reviewed later.
aoqi@0	40
aoqi@0	41	static mutex_t global_mut;
aoqi@0	42	static thread_t global_mut_owner = -1;
aoqi@0	43	static int global_mut_count = 0;
aoqi@0	44	static bool initialized = false;
aoqi@0	45
aoqi@0	46	ThreadCritical::ThreadCritical() {
aoqi@0	47	if (initialized) {
aoqi@0	48	thread_t owner = thr_self();
aoqi@0	49	if (global_mut_owner != owner) {
aoqi@0	50	if (os::Solaris::mutex_lock(&global_mut))
aoqi@0	51	fatal(err_msg("ThreadCritical::ThreadCritical: mutex_lock failed (%s)",
aoqi@0	52	strerror(errno)));
aoqi@0	53	assert(global_mut_count == 0, "must have clean count");
aoqi@0	54	assert(global_mut_owner == -1, "must have clean owner");
aoqi@0	55	}
aoqi@0	56	global_mut_owner = owner;
aoqi@0	57	++global_mut_count;
aoqi@0	58	} else {
aoqi@0	59	assert (Threads::number_of_threads() == 0, "valid only during initialization");
aoqi@0	60	}
aoqi@0	61	}
aoqi@0	62
aoqi@0	63	ThreadCritical::~ThreadCritical() {
aoqi@0	64	if (initialized) {
aoqi@0	65	assert(global_mut_owner == thr_self(), "must have correct owner");
aoqi@0	66	assert(global_mut_count > 0, "must have correct count");
aoqi@0	67	--global_mut_count;
aoqi@0	68	if (global_mut_count == 0) {
aoqi@0	69	global_mut_owner = -1;
aoqi@0	70	if (os::Solaris::mutex_unlock(&global_mut))
aoqi@0	71	fatal(err_msg("ThreadCritical::~ThreadCritical: mutex_unlock failed "
aoqi@0	72	"(%s)", strerror(errno)));
aoqi@0	73	}
aoqi@0	74	} else {
aoqi@0	75	assert (Threads::number_of_threads() == 0, "valid only during initialization");
aoqi@0	76	}
aoqi@0	77	}
aoqi@0	78
aoqi@0	79	void ThreadCritical::initialize() {
aoqi@0	80	// This method is called at the end of os::init(). Until
aoqi@0	81	// then, we don't do real locking.
aoqi@0	82	initialized = true;
aoqi@0	83	}
aoqi@0	84
aoqi@0	85	void ThreadCritical::release() {
aoqi@0	86	}