user_uma.h (3754B)
1 /*- 2 * Copyright (c) 2009-2010 Brad Penoff 3 * Copyright (c) 2009-2010 Humaira Kamal 4 * Copyright (c) 2011-2012 Irene Ruengeler 5 * Copyright (c) 2011-2012 Michael Tuexen 6 * 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef _USER_UMA_H_ 32 #define _USER_UMA_H_ 33 34 #define UMA_ZFLAG_FULL 0x40000000 /* Reached uz_maxpages */ 35 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 36 37 /* __Userspace__ All these definitions will change for 38 userspace Universal Memory Allocator (UMA). These are included 39 for reference purposes and to avoid compile errors for the time being. 40 */ 41 typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags); 42 typedef void (*uma_dtor)(void *mem, int size, void *arg); 43 typedef int (*uma_init)(void *mem, int size, int flags); 44 typedef void (*uma_fini)(void *mem, int size); 45 typedef struct uma_zone * uma_zone_t; 46 typedef struct uma_keg * uma_keg_t; 47 48 struct uma_cache { 49 int stub; /* TODO __Userspace__ */ 50 }; 51 52 struct uma_keg { 53 int stub; /* TODO __Userspace__ */ 54 }; 55 56 struct uma_zone { 57 char *uz_name; /* Text name of the zone */ 58 struct mtx *uz_lock; /* Lock for the zone (keg's lock) */ 59 uma_keg_t uz_keg; /* Our underlying Keg */ 60 61 LIST_ENTRY(uma_zone) uz_link; /* List of all zones in keg */ 62 LIST_HEAD(,uma_bucket) uz_full_bucket; /* full buckets */ 63 LIST_HEAD(,uma_bucket) uz_free_bucket; /* Buckets for frees */ 64 65 uma_ctor uz_ctor; /* Constructor for each allocation */ 66 uma_dtor uz_dtor; /* Destructor */ 67 uma_init uz_init; /* Initializer for each item */ 68 uma_fini uz_fini; /* Discards memory */ 69 70 u_int64_t uz_allocs; /* Total number of allocations */ 71 u_int64_t uz_frees; /* Total number of frees */ 72 u_int64_t uz_fails; /* Total number of alloc failures */ 73 uint16_t uz_fills; /* Outstanding bucket fills */ 74 uint16_t uz_count; /* Highest value ub_ptr can have */ 75 76 /* 77 * This HAS to be the last item because we adjust the zone size 78 * based on NCPU and then allocate the space for the zones. 79 */ 80 struct uma_cache uz_cpu[1]; /* Per cpu caches */ 81 }; 82 83 /* Prototype */ 84 uma_zone_t 85 uma_zcreate(char *name, size_t size, uma_ctor ctor, uma_dtor dtor, 86 uma_init uminit, uma_fini fini, int align, uint32_t flags); 87 88 89 #define uma_zone_set_max(zone, number) /* stub TODO __Userspace__ */ 90 91 uma_zone_t 92 uma_zcreate(char *name, size_t size, uma_ctor ctor, uma_dtor dtor, 93 uma_init uminit, uma_fini fini, int align, uint32_t flags) { 94 return NULL; /* stub TODO __Userspace__. Also place implementation in a separate .c file */ 95 } 96 #endif