| /* |
| * 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 |
| |