| | 1 | /* |
| | 2 | * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>. All rights reserved. |
| | 3 | * Copyright (c) 1998 David Greenman. All rights reserved. |
| | 4 | * |
| | 5 | * Redistribution and use in source and binary forms, with or without |
| | 6 | * modification, are permitted provided that the following conditions |
| | 7 | * are met: |
| | 8 | * 1. Redistributions of source code must retain the above copyright |
| | 9 | * notice, this list of conditions and the following disclaimer. |
| | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 11 | * notice, this list of conditions and the following disclaimer in the |
| | 12 | * documentation and/or other materials provided with the distribution. |
| | 13 | * |
| | 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| | 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| | 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 24 | * SUCH DAMAGE. |
| | 25 | */ |
| | 26 | |
| | 27 | #ifndef _SYS_SFBUF_H_ |
| | 28 | #define _SYS_SFBUF_H_ |
| | 29 | |
| | 30 | #ifndef _SYS_TYPES_H_ |
| | 31 | #include <sys/types.h> |
| | 32 | #endif |
| | 33 | #ifndef _CPU_LWBUF_H_ |
| | 34 | #include <cpu/lwbuf.h> |
| | 35 | #endif |
| | 36 | |
| | 37 | #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) |
| | 38 | #error "This file should not be included by userland programs." |
| | 39 | #endif |
| | 40 | |
| | 41 | struct sf_buf { |
| | 42 | struct lwbuf *lwbuf; /* lightweight buffer */ |
| | 43 | u_int ref; /* ref count */ |
| | 44 | struct lwbuf lwbuf_cache; |
| | 45 | }; |
| | 46 | |
| | 47 | #define sf_buf_kva(sf) (lwbuf_kva((sf)->lwbuf)) |
| | 48 | #define sf_buf_page(sf) (lwbuf_page((sf)->lwbuf)) |
| | 49 | |
| | 50 | |
| | 51 | #if defined(_KERNEL) |
| | 52 | |
| | 53 | struct sf_buf *sf_buf_alloc(struct vm_page *); |
| | 54 | void sf_buf_ref(void *); |
| | 55 | int sf_buf_free(void *); |
| | 56 | |
| | 57 | #endif |
| | 58 | |
| | 59 | #endif /* !_SYS_SFBUF_H_ */ |
projects / dragonfly.git / blame_incremental