The Tor Browser: netwerk/sctp/src/user

     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  */

    31 #ifndef _USER_UMA_H_

    32 #define _USER_UMA_H_

    34 #define UMA_ZFLAG_FULL		0x40000000	/* Reached uz_maxpages */

    35 #define UMA_ALIGN_PTR	(sizeof(void *) - 1)	/* Alignment fit for ptr */

    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;

    48 struct uma_cache {

    49     int stub; /* TODO __Userspace__ */

    50 };

    52 struct uma_keg {

    53     int stub; /* TODO __Userspace__ */

    54 };

    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 */

    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 */

    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 */

    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 */

    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 };

    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, u_int32_t flags);

    89 #define uma_zone_set_max(zone, number) /* stub TODO __Userspace__ */

    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, u_int32_t flags)

    94 {

    95     return NULL; /* stub TODO __Userspace__. Also place implementation in a separate .c file */

    97 }

    98 #endif

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