M7350/bootable/bootloader/lk/include/lib/cbuf.h
2024-09-09 08:52:07 +00:00

43 lines
1.5 KiB
C

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