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Last change
on this file since cd1e3fc0 was d7f7a4a, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 3 years ago |
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Replace some license headers with SPDX identifier
Headers are replaced using tools/transorm-copyright.sh only
when it can be matched verbatim with the license header used
throughout most of the codebase.
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-
Property mode
set to
100644
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File size:
813 bytes
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| 1 | /*
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| 2 | * SPDX-FileCopyrightText: 2017 Jiri Svoboda
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| 3 | *
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| 4 | * SPDX-License-Identifier: BSD-3-Clause
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| 5 | */
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| 6 |
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| 7 | /** @addtogroup libc
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| 8 | * @{
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| 9 | */
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| 10 | /** @file Circular buffer
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| 11 | */
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| 12 |
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| 13 | #ifndef _LIBC_CIRC_BUF_H_
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| 14 | #define _LIBC_CIRC_BUF_H_
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| 15 |
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| 16 | #include <errno.h>
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| 17 | #include <stddef.h>
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| 18 |
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| 19 | /** Circular buffer */
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| 20 | typedef struct {
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| 21 | /** Buffer */
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| 22 | void *buf;
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| 23 | /** Number of buffer members */
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| 24 | size_t nmemb;
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| 25 | /** Member size */
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| 26 | size_t size;
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| 27 | /** Read position */
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| 28 | size_t rp;
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| 29 | /** Write position */
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| 30 | size_t wp;
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| 31 | /** Number of used entries */
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| 32 | size_t nused;
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| 33 | } circ_buf_t;
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| 34 |
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| 35 | extern void circ_buf_init(circ_buf_t *, void *, size_t, size_t);
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| 36 | extern size_t circ_buf_nfree(circ_buf_t *);
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| 37 | extern size_t circ_buf_nused(circ_buf_t *);
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| 38 | extern errno_t circ_buf_push(circ_buf_t *, const void *);
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| 39 | extern errno_t circ_buf_pop(circ_buf_t *, void *);
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| 40 |
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| 41 | #endif
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| 42 |
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| 43 | /** @}
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| 44 | */
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