/* * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2020 SAP SE. 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. *
*/
MetaWord* FreeBlocks::remove_block(size_t requested_word_size) {
assert(requested_word_size >= MinWordSize, "requested_word_size too small (" SIZE_FORMAT ")", requested_word_size);
size_t real_size = 0;
MetaWord* p = NULL; if (requested_word_size > MaxSmallBlocksWordSize) {
p = _tree.remove_block(requested_word_size, &real_size);
} else {
p = _small_blocks.remove_block(requested_word_size, &real_size);
} if (p != NULL) { // Blocks which are larger than a certain threshold are split and // the remainder is handed back to the manager. const size_t waste = real_size - requested_word_size; if (waste > MinWordSize) {
add_block(p + requested_word_size, waste);
}
} return p;
}
} // namespace metaspace
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