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      1 /*-
      2  * Copyright (c) 2018 Mindaugas Rasiukevicius <rmind at noxt eu>
      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 
     27 #ifndef _SYS_THMAP_H_
     28 #define _SYS_THMAP_H_
     29 
     30 #if !defined(_KERNEL)
     31 #error "not supposed to be exposed to userland"
     32 #endif
     33 
     34 __BEGIN_DECLS
     35 
     36 struct thmap;
     37 typedef struct thmap thmap_t;
     38 
     39 #define	THMAP_NOCOPY	0x01
     40 #define	THMAP_SETROOT	0x02
     41 
     42 typedef struct {
     43 	uintptr_t	(*alloc)(size_t);
     44 	void		(*free)(uintptr_t, size_t);
     45 } thmap_ops_t;
     46 
     47 thmap_t *	thmap_create(uintptr_t, const thmap_ops_t *, unsigned);
     48 void		thmap_destroy(thmap_t *);
     49 
     50 void *		thmap_get(thmap_t *, const void *, size_t);
     51 void *		thmap_put(thmap_t *, const void *, size_t, void *);
     52 void *		thmap_del(thmap_t *, const void *, size_t);
     53 
     54 void *		thmap_stage_gc(thmap_t *);
     55 void		thmap_gc(thmap_t *, void *);
     56 
     57 int		thmap_setroot(thmap_t *, uintptr_t);
     58 uintptr_t	thmap_getroot(const thmap_t *);
     59 
     60 __END_DECLS
     61 
     62 #endif
     63