43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/*
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* Copyright (c) 2009 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* 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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#ifndef __LIB_CBUF_H
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#define __LIB_CBUF_H
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#include <sys/types.h>
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#include <kernel/event.h>
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typedef struct cbuf {
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uint head;
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uint tail;
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uint len_pow2;
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char *buf;
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event_t event;
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} cbuf_t;
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void cbuf_initialize(cbuf_t *cbuf, size_t len);
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size_t cbuf_read(cbuf_t *cbuf, void *_buf, size_t buflen, bool block);
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size_t cbuf_write(cbuf_t *cbuf, const void *_buf, size_t len, bool canreschedule);
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#endif
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