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drm_mem_util.h revision 1.1.2.1 
      1 /*	$NetBSD: drm_mem_util.h,v 1.1.2.1 2013/07/24 01:56:19 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _DRM_MEM_UTIL_H_
     33 #define _DRM_MEM_UTIL_H_
     34 
     35 #include <sys/types.h>
     36 #include <sys/kmem.h>
     37 #include <sys/systm.h>
     38 
     39 static inline void *
     40 drm_calloc_large(size_t n, size_t size)
     41 {
     42 
     43 #if 1
     44 	KASSERT(size != 0);	/* XXX Let's see whether this ever happens.  */
     45 #else
     46 	if (size == 0)
     47 		return NULL;	/* XXX OK?  */
     48 #endif
     49 
     50 	if (n > (SIZE_MAX / size))
     51 		return NULL;
     52 
     53 	return kmem_zalloc((n * size), KM_SLEEP);
     54 }
     55 
     56 static inline void *
     57 drm_malloc_ab(size_t n, size_t size)
     58 {
     59 
     60 #if 1
     61 	KASSERT(size != 0);	/* XXX Let's see whether this ever happens.  */
     62 #else
     63 	if (size == 0)
     64 		return NULL;	/* XXX OK?  */
     65 #endif
     66 
     67 	return kmem_alloc((n * size), KM_SLEEP);
     68 }
     69 
     70 static inline void
     71 drm_free_large(void *ptr, size_t n, size_t size)
     72 {
     73 
     74 #if 0				/* XXX */
     75 	if (ptr != NULL)
     76 #endif
     77 	{
     78 		KASSERT(size != 0);
     79 		KASSERT(n <= (SIZE_MAX / size));
     80 		kmem_free(ptr, (n * size));
     81 	}
     82 }
     83 
     84 #endif  /* _DRM_MEM_UTIL_H_ */
     85