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8079792: GC directory structure cleanup

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Reviewed-by: brutisso, stefank, david
This commit is contained in:
Per Lidén 2015-05-13 15:16:06 +02:00
parent 042902811c
commit 4dc240f785
521 changed files with 2481 additions and 2573 deletions
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98
hotspot/src/share/vm/gc_implementation/shared/suspendibleThreadSet.cpp
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@ -1,98 +0,0 @@
/*
* Copyright (c) 2014, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "gc_implementation/shared/suspendibleThreadSet.hpp"
#include "runtime/mutexLocker.hpp"
#include "runtime/thread.inline.hpp"
uint SuspendibleThreadSet::_nthreads = 0;
uint SuspendibleThreadSet::_nthreads_stopped = 0;
bool SuspendibleThreadSet::_suspend_all = false;
double SuspendibleThreadSet::_suspend_all_start = 0.0;
void SuspendibleThreadSet::join() {
assert(!Thread::current()->is_suspendible_thread(), "Thread already joined");
MonitorLockerEx ml(STS_lock, Mutex::_no_safepoint_check_flag);
while (_suspend_all) {
ml.wait(Mutex::_no_safepoint_check_flag);
}
_nthreads++;
DEBUG_ONLY(Thread::current()->set_suspendible_thread();)
}
void SuspendibleThreadSet::leave() {
assert(Thread::current()->is_suspendible_thread(), "Thread not joined");
MonitorLockerEx ml(STS_lock, Mutex::_no_safepoint_check_flag);
assert(_nthreads > 0, "Invalid");
DEBUG_ONLY(Thread::current()->clear_suspendible_thread();)
_nthreads--;
if (_suspend_all) {
ml.notify_all();
}
}
void SuspendibleThreadSet::yield() {
assert(Thread::current()->is_suspendible_thread(), "Must have joined");
if (_suspend_all) {
MonitorLockerEx ml(STS_lock, Mutex::_no_safepoint_check_flag);
if (_suspend_all) {
_nthreads_stopped++;
if (_nthreads_stopped == _nthreads) {
if (ConcGCYieldTimeout > 0) {
double now = os::elapsedTime();
guarantee((now - _suspend_all_start) * 1000.0 < (double)ConcGCYieldTimeout, "Long delay");
}
}
ml.notify_all();
while (_suspend_all) {
ml.wait(Mutex::_no_safepoint_check_flag);
}
assert(_nthreads_stopped > 0, "Invalid");
_nthreads_stopped--;
ml.notify_all();
}
}
}
void SuspendibleThreadSet::synchronize() {
assert(Thread::current()->is_VM_thread(), "Must be the VM thread");
if (ConcGCYieldTimeout > 0) {
_suspend_all_start = os::elapsedTime();
}
MonitorLockerEx ml(STS_lock, Mutex::_no_safepoint_check_flag);
assert(!_suspend_all, "Only one at a time");
_suspend_all = true;
while (_nthreads_stopped < _nthreads) {
ml.wait(Mutex::_no_safepoint_check_flag);
}
}
void SuspendibleThreadSet::desynchronize() {
assert(Thread::current()->is_VM_thread(), "Must be the VM thread");
MonitorLockerEx ml(STS_lock, Mutex::_no_safepoint_check_flag);
assert(_nthreads_stopped == _nthreads, "Invalid");
_suspend_all = false;
ml.notify_all();
}