2 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $DragonFly: src/sys/sys/mpipe.h,v 1.1 2003/11/30 20:13:53 dillon Exp $
32 #ifndef _SYS_MALLOC_H_
33 #include <sys/malloc.h>
37 * Pipeline memory allocations. This implements a pipeline for allocations
38 * of a particular size. It is used in order to allow memory allocations
39 * to block while at the same time guarenteeing that no deadlocks will occur.
44 TAILQ_HEAD(, mpipe_buf) queue;
45 malloc_type_t type; /* malloc bucket */
46 int bytes; /* allocation size */
47 int pending; /* there is a request pending */
48 int free_count; /* entries in free list */
49 int total_count; /* total free + outstanding */
50 int max_count; /* maximum cache size */
51 void (*trigger)(void *data); /* trigger function on free */
55 typedef struct malloc_pipe *malloc_pipe_t;
59 void mpipe_init(malloc_pipe_t mpipe, malloc_type_t type,
60 int bytes, int nnow, int nmax);
61 void mpipe_done(malloc_pipe_t mpipe);
62 void *mpipe_alloc(malloc_pipe_t mpipe, int flags);
63 void mpipe_free(malloc_pipe_t mpipe, void *vbuf);