2017-08-08 15:15:34 +01:00
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/**************************************************************************
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*
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* Copyright 2017 Valve Corporation
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef U_IDALLOC_H
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#define U_IDALLOC_H
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#include <inttypes.h>
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2021-05-06 01:09:56 +01:00
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#include <stdbool.h>
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#include "simple_mtx.h"
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2017-08-08 15:15:34 +01:00
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct util_idalloc
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{
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uint32_t *data;
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2021-05-17 20:59:20 +01:00
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unsigned num_elements; /* number of allocated elements of "data" */
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2020-09-07 14:15:50 +01:00
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unsigned lowest_free_idx;
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2017-08-08 15:15:34 +01:00
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};
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void
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util_idalloc_init(struct util_idalloc *buf);
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void
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util_idalloc_fini(struct util_idalloc *buf);
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void
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util_idalloc_resize(struct util_idalloc *buf, unsigned new_num_elements);
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unsigned
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util_idalloc_alloc(struct util_idalloc *buf);
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void
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util_idalloc_free(struct util_idalloc *buf, unsigned id);
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2020-09-07 13:47:47 +01:00
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void
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util_idalloc_reserve(struct util_idalloc *buf, unsigned id);
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2021-05-06 01:09:56 +01:00
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/* Thread-safe variant. */
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struct util_idalloc_mt {
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struct util_idalloc buf;
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simple_mtx_t mutex;
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bool skip_zero;
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};
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void
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util_idalloc_mt_init(struct util_idalloc_mt *buf,
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unsigned initial_num_elements, bool skip_zero);
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void
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util_idalloc_mt_init_tc(struct util_idalloc_mt *buf);
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void
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util_idalloc_mt_fini(struct util_idalloc_mt *buf);
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void
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util_idalloc_mt_resize(struct util_idalloc_mt *buf, unsigned new_num_elements);
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unsigned
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util_idalloc_mt_alloc(struct util_idalloc_mt *buf);
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void
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util_idalloc_mt_free(struct util_idalloc_mt *buf, unsigned id);
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void
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util_idalloc_mt_reserve(struct util_idalloc_mt *buf, unsigned id);
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2017-08-08 15:15:34 +01:00
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#ifdef __cplusplus
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}
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#endif
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#endif /* U_IDALLOC_H */
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