55e86a81b7
Instead of:
foo = malloc(sizeof(foo), M_WAIT);
bzero(foo, sizeof(foo));
You can now (and please do) use:
foo = malloc(sizeof(foo), M_WAIT | M_ZERO);
In the future this will enable us to do idle-time pre-zeroing of
malloc-space.
180 lines
6.5 KiB
C
180 lines
6.5 KiB
C
/*
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* Copyright (c) 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)malloc.h 8.5 (Berkeley) 5/3/95
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* $FreeBSD$
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*/
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#ifndef _SYS_MALLOC_H_
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#define _SYS_MALLOC_H_
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#define splmem splhigh
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/*
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* flags to malloc.
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*/
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#define M_WAITOK 0x0000
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#define M_NOWAIT 0x0001 /* do not block */
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#define M_USE_RESERVE 0x0002 /* can alloc out of reserve memory */
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#define M_ASLEEP 0x0004 /* async sleep on failure */
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#define M_ZERO 0x0008 /* bzero the allocation */
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#define M_MAGIC 877983977 /* time when first defined :-) */
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struct malloc_type {
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struct malloc_type *ks_next; /* next in list */
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long ks_memuse; /* total memory held in bytes */
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long ks_limit; /* most that are allowed to exist */
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long ks_size; /* sizes of this thing that are allocated */
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long ks_inuse; /* # of packets of this type currently in use */
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int64_t ks_calls; /* total packets of this type ever allocated */
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long ks_maxused; /* maximum number ever used */
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u_long ks_magic; /* if it's not magic, don't touch it */
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const char *ks_shortdesc; /* short description */
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u_short ks_limblocks; /* number of times blocked for hitting limit */
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u_short ks_mapblocks; /* number of times blocked for kernel map */
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};
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#ifdef _KERNEL
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#define MALLOC_DEFINE(type, shortdesc, longdesc) \
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struct malloc_type type[1] = { \
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{ NULL, 0, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, 0, 0 } \
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}; \
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SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, type); \
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SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
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#define MALLOC_DECLARE(type) \
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extern struct malloc_type type[1]
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MALLOC_DECLARE(M_CACHE);
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MALLOC_DECLARE(M_DEVBUF);
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MALLOC_DECLARE(M_TEMP);
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MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
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MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
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#endif /* _KERNEL */
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/*
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* Array of descriptors that describe the contents of each page
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*/
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struct kmemusage {
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short ku_indx; /* bucket index */
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union {
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u_short freecnt;/* for small allocations, free pieces in page */
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u_short pagecnt;/* for large allocations, pages alloced */
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} ku_un;
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};
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#define ku_freecnt ku_un.freecnt
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#define ku_pagecnt ku_un.pagecnt
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/*
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* Set of buckets for each size of memory block that is retained
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*/
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struct kmembuckets {
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caddr_t kb_next; /* list of free blocks */
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caddr_t kb_last; /* last free block */
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int64_t kb_calls; /* total calls to allocate this size */
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long kb_total; /* total number of blocks allocated */
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long kb_elmpercl; /* # of elements in this sized allocation */
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long kb_totalfree; /* # of free elements in this bucket */
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long kb_highwat; /* high water mark */
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long kb_couldfree; /* over high water mark and could free */
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};
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#ifdef _KERNEL
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#define MINALLOCSIZE (1 << MINBUCKET)
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#define BUCKETINDX(size) \
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((size) <= (MINALLOCSIZE * 128) \
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? (size) <= (MINALLOCSIZE * 8) \
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? (size) <= (MINALLOCSIZE * 2) \
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? (size) <= (MINALLOCSIZE * 1) \
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? (MINBUCKET + 0) \
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: (MINBUCKET + 1) \
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: (size) <= (MINALLOCSIZE * 4) \
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? (MINBUCKET + 2) \
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: (MINBUCKET + 3) \
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: (size) <= (MINALLOCSIZE* 32) \
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? (size) <= (MINALLOCSIZE * 16) \
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? (MINBUCKET + 4) \
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: (MINBUCKET + 5) \
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: (size) <= (MINALLOCSIZE * 64) \
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? (MINBUCKET + 6) \
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: (MINBUCKET + 7) \
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: (size) <= (MINALLOCSIZE * 2048) \
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? (size) <= (MINALLOCSIZE * 512) \
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? (size) <= (MINALLOCSIZE * 256) \
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? (MINBUCKET + 8) \
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: (MINBUCKET + 9) \
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: (size) <= (MINALLOCSIZE * 1024) \
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? (MINBUCKET + 10) \
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: (MINBUCKET + 11) \
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: (size) <= (MINALLOCSIZE * 8192) \
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? (size) <= (MINALLOCSIZE * 4096) \
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? (MINBUCKET + 12) \
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: (MINBUCKET + 13) \
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: (size) <= (MINALLOCSIZE * 16384) \
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? (MINBUCKET + 14) \
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: (MINBUCKET + 15))
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/*
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* Turn virtual addresses into kmemusage pointers.
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*/
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#define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT])
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/*
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* Deprecated macro versions of not-quite-malloc() and free().
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*/
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#define MALLOC(space, cast, size, type, flags) \
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(space) = (cast)malloc((u_long)(size), (type), (flags))
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#define FREE(addr, type) free((addr), (type))
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/*
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* XXX this should be declared in <sys/uio.h>, but that tends to fail
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* because <sys/uio.h> is included in a header before the source file
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* has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
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*/
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MALLOC_DECLARE(M_IOV);
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/* XXX struct malloc_type is unused for contig*(). */
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void contigfree __P((void *addr, unsigned long size,
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struct malloc_type *type));
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void *contigmalloc __P((unsigned long size, struct malloc_type *type,
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int flags, unsigned long low, unsigned long high,
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unsigned long alignment, unsigned long boundary));
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void free __P((void *addr, struct malloc_type *type));
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void *malloc __P((unsigned long size, struct malloc_type *type, int flags));
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void malloc_init __P((void *));
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void malloc_uninit __P((void *));
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#endif /* _KERNEL */
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#endif /* !_SYS_MALLOC_H_ */
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