1 /* 2 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.com> 3 * 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 * $DragonFly: src/sys/sys/mpipe.h,v 1.1 2003/11/30 20:13:53 dillon Exp $ 27 */ 28 29 #ifndef _SYS_MPIPE_H_ 30 #define _SYS_MPIPE_H_ 31 32 #ifndef _SYS_MALLOC_H_ 33 #include <sys/malloc.h> 34 #endif 35 36 /* 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. 40 */ 41 struct mpipe_buf; 42 43 struct malloc_pipe { 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 */ 52 void *trigger_data; 53 }; 54 55 typedef struct malloc_pipe *malloc_pipe_t; 56 57 #ifdef _KERNEL 58 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); 64 65 #endif 66 67 #endif 68 69