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/* Prototypes and definition for malloc implementation.
Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _MALLOC_H
#define _MALLOC_H 1
/*
`ptmalloc', a malloc implementation for multiple threads without
lock contention, by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>.
See the files `ptmalloc.c' or `COPYRIGHT' for copying conditions.
VERSION 2.6.4-pt Wed Dec 4 00:35:54 MET 1996
This work is mainly derived from malloc-2.6.4 by Doug Lea
<dl@cs.oswego.edu>, which is available from:
ftp://g.oswego.edu/pub/misc/malloc.c
This trimmed-down header file only provides function prototypes and
the exported data structures. For more detailed function
descriptions and compile-time options, see the source file
`ptmalloc.c'.
*/
#if defined(__STDC__) || defined (__cplusplus)
#include <stddef.h>
#define __malloc_ptr_t void *
#else
#undef size_t
#define size_t unsigned int
#undef ptrdiff_t
#define ptrdiff_t int
#define __malloc_ptr_t char *
#endif
#ifdef _LIBC
/* Used by GNU libc internals. */
#define __malloc_size_t size_t
#define __malloc_ptrdiff_t ptrdiff_t
#endif
#if defined (__STDC__) || defined (__cplusplus) || defined (__GNUC__)
#define __MALLOC_P(args) args
#else
#define __MALLOC_P(args) ()
#endif
#ifndef NULL
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((__malloc_ptr_t) 0)
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Initialize global configuration. Not needed with GNU libc. */
#ifndef __GLIBC__
extern void ptmalloc_init __MALLOC_P ((void));
#endif
/* Allocate SIZE bytes of memory. */
extern __malloc_ptr_t malloc __MALLOC_P ((size_t __size));
/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
extern __malloc_ptr_t calloc __MALLOC_P ((size_t __nmemb, size_t __size));
/* Re-allocate the previously allocated block in __ptr, making the new
block SIZE bytes long. */
extern __malloc_ptr_t realloc __MALLOC_P ((__malloc_ptr_t __ptr, size_t __size));
/* Free a block allocated by `malloc', `realloc' or `calloc'. */
extern void free __MALLOC_P ((__malloc_ptr_t __ptr));
/* Free a block allocated by `calloc'. */
extern void cfree __MALLOC_P ((__malloc_ptr_t __ptr));
/* Allocate SIZE bytes allocated to ALIGNMENT bytes. */
extern __malloc_ptr_t memalign __MALLOC_P ((size_t __alignment, size_t __size));
/* Allocate SIZE bytes on a page boundary. */
extern __malloc_ptr_t valloc __MALLOC_P ((size_t __size));
/* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up
__size to nearest pagesize. */
extern __malloc_ptr_t pvalloc __MALLOC_P ((size_t __size));
/* Underlying allocation function; successive calls should return
contiguous pieces of memory. */
extern __malloc_ptr_t (*__morecore) __MALLOC_P ((ptrdiff_t __size));
/* Default value of `__morecore'. */
extern __malloc_ptr_t __default_morecore __MALLOC_P ((ptrdiff_t __size));
/* SVID2/XPG mallinfo structure */
struct mallinfo {
int arena; /* total space allocated from system */
int ordblks; /* number of non-inuse chunks */
int smblks; /* unused -- always zero */
int hblks; /* number of mmapped regions */
int hblkhd; /* total space in mmapped regions */
int usmblks; /* unused -- always zero */
int fsmblks; /* unused -- always zero */
int uordblks; /* total allocated space */
int fordblks; /* total non-inuse space */
int keepcost; /* top-most, releasable (via malloc_trim) space */
};
/* Returns a copy of the updated current mallinfo. */
extern struct mallinfo mallinfo __MALLOC_P ((void));
/* SVID2/XPG mallopt options */
#ifndef M_MXFAST
#define M_MXFAST 1 /* UNUSED in this malloc */
#endif
#ifndef M_NLBLKS
#define M_NLBLKS 2 /* UNUSED in this malloc */
#endif
#ifndef M_GRAIN
#define M_GRAIN 3 /* UNUSED in this malloc */
#endif
#ifndef M_KEEP
#define M_KEEP 4 /* UNUSED in this malloc */
#endif
/* mallopt options that actually do something */
#define M_TRIM_THRESHOLD -1
#define M_TOP_PAD -2
#define M_MMAP_THRESHOLD -3
#define M_MMAP_MAX -4
/* General SVID/XPG interface to tunable parameters. */
extern int mallopt __MALLOC_P ((int __param, int __val));
/* Release all but __pad bytes of freed top-most memory back to the
system. Return 1 if successful, else 0. */
extern int malloc_trim __MALLOC_P ((size_t __pad));
/* Report the number of usable allocated bytes associated with allocated
chunk __ptr. */
extern size_t malloc_usable_size __MALLOC_P ((__malloc_ptr_t __ptr));
/* Prints brief summary statistics on stderr. */
extern void malloc_stats __MALLOC_P ((void));
#ifdef __cplusplus
}; /* end of extern "C" */
#endif
#endif /* !defined(_MALLOC_H) */
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