1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #include "precompiled.hpp"

    25 #include "gc/z/zArray.inline.hpp"

    26 #include "gc/z/zNMethodAllocator.hpp"

    27 #include "memory/allocation.hpp"

    28 

    29 ZArray<void*> ZNMethodAllocator::_deferred_frees;

    30 bool          ZNMethodAllocator::_defer_frees(false);

    31 

    32 void ZNMethodAllocator::immediate_free(void* data) {

    33   FREE_C_HEAP_ARRAY(uint8_t, data);

    34 }

    35 

    36 void ZNMethodAllocator::deferred_free(void* data) {

    37   _deferred_frees.add(data);

    38 }

    39 

    40 void* ZNMethodAllocator::allocate(size_t size) {

    41   return NEW_C_HEAP_ARRAY(uint8_t, size, mtGC);

    42 }

    43 

    44 void ZNMethodAllocator::free(void* data) {

    45   if (data == NULL) {

    46     return;

    47   }

    48 

    49   if (_defer_frees) {

    50     deferred_free(data);

    51   } else {

    52     immediate_free(data);

    53   }

    54 }

    55 

    56 void ZNMethodAllocator::activate_deferred_frees() {

    57   assert(_deferred_frees.is_empty(), "precondition");

    58   _defer_frees = true;

    59 }

    60 

    61 void ZNMethodAllocator::deactivate_and_process_deferred_frees() {

    62   _defer_frees = false;

    63 

    64   ZArrayIterator<void*> iter(&_deferred_frees);

    65   for (void* data; iter.next(&data);) {

    66     immediate_free(data);

    67   }

    68   _deferred_frees.clear();

    69 }