8220592: ZGC: Move destruction of detached ZPages into ZPageAllocator
Reviewed-by: stefank, eosterlund
/*
* Copyright (c) 2019, 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/z/zArray.inline.hpp"
#include "gc/z/zNMethodAllocator.hpp"
#include "memory/allocation.hpp"
ZArray<void*> ZNMethodAllocator::_deferred_frees;
bool ZNMethodAllocator::_defer_frees(false);
void ZNMethodAllocator::immediate_free(void* data) {
FREE_C_HEAP_ARRAY(uint8_t, data);
}
void ZNMethodAllocator::deferred_free(void* data) {
_deferred_frees.add(data);
}
void* ZNMethodAllocator::allocate(size_t size) {
return NEW_C_HEAP_ARRAY(uint8_t, size, mtGC);
}
void ZNMethodAllocator::free(void* data) {
if (data == NULL) {
return;
}
if (_defer_frees) {
deferred_free(data);
} else {
immediate_free(data);
}
}
void ZNMethodAllocator::activate_deferred_frees() {
assert(_deferred_frees.is_empty(), "precondition");
_defer_frees = true;
}
void ZNMethodAllocator::deactivate_and_process_deferred_frees() {
_defer_frees = false;
ZArrayIterator<void*> iter(&_deferred_frees);
for (void* data; iter.next(&data);) {
immediate_free(data);
}
_deferred_frees.clear();
}