76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/*****************************************************************************
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Copyright (c) 2006, 2018, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License, version 2.0, as published by the
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Free Software Foundation.
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This program is also distributed with certain software (including but not
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limited to OpenSSL) that is licensed under separate terms, as designated in a
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particular file or component or in included license documentation. The authors
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of MySQL hereby grant you an additional permission to link the program and
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your derivative works with the separately licensed software that they have
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included with MySQL.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
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for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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/** @file ut/ut0vec.cc
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A vector of pointers to data items
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Created 4/6/2006 Osku Salerma
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************************************************************************/
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#include "ut0vec.h"
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#include "mem0mem.h"
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/********************************************************************
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Create a new vector with the given initial size. */
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ib_vector_t *ib_vector_create(
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/* out: vector */
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ib_alloc_t *allocator, /* in: vector allocator */
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ulint sizeof_value, /* in: size of data item */
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ulint size) /* in: initial size */
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{
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ib_vector_t *vec;
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ut_a(size > 0);
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vec = static_cast<ib_vector_t *>(
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allocator->mem_malloc(allocator, sizeof(*vec)));
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vec->used = 0;
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vec->total = size;
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vec->allocator = allocator;
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vec->sizeof_value = sizeof_value;
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vec->data = static_cast<void *>(
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allocator->mem_malloc(allocator, vec->sizeof_value * size));
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return (vec);
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}
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/********************************************************************
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Resize the vector, currently the vector can only grow and we
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expand the number of elements it can hold by 2 times. */
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void ib_vector_resize(ib_vector_t *vec) /* in: vector */
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{
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ulint new_total = vec->total * 2;
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ulint old_size = vec->used * vec->sizeof_value;
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ulint new_size = new_total * vec->sizeof_value;
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vec->data = static_cast<void *>(vec->allocator->mem_resize(
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vec->allocator, vec->data, old_size, new_size));
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vec->total = new_total;
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}
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