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/* Prototypes and definition for malloc implementation.
Copyright (C) 1996, 1997, 1999, 2000 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; 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
#include <features.h>
`ptmalloc', a malloc implementation for multiple threads without
lock contention, by Wolfram Gloger <>.
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
<>, which is available from:
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
#if defined(__STDC__) || defined (__cplusplus)
# include <stddef.h>
# define __malloc_ptr_t void *
# undef size_t
# define size_t unsigned int
# undef ptrdiff_t
# define ptrdiff_t int
# define __malloc_ptr_t char *
#if !defined __attribute_malloc__
# define __attribute_malloc__
#ifdef __GNUC__
/* GCC can always grok prototypes. For C++ programs we add throw()
to help it optimize the function calls. But this works only with
gcc 2.8.x and egcs. */
#ifndef __THROW
# if defined __cplusplus && (__GNUC__ >= 3 || __GNUC_MINOR__ >= 8)
# define __THROW throw ()
# else
# define __THROW
# endif
# define __MALLOC_P(args) args __THROW
/* This macro will be used for functions which might take C++ callback
functions. */
# define __MALLOC_PMT(args) args
#else /* Not GCC. */
# define __THROW
# if (defined __STDC__ && __STDC__) || defined __cplusplus
# define __MALLOC_P(args) args
# define __MALLOC_PMT(args) args
# else /* Not ANSI C or C++. */
# define __MALLOC_P(args) () /* No prototypes. */
# define __MALLOC_PMT(args) ()
# endif /* ANSI C or C++. */
#endif /* GCC. */
#ifndef NULL
# ifdef __cplusplus
# define NULL 0
# else
# define NULL ((__malloc_ptr_t) 0)
# endif
#ifdef __cplusplus
extern "C" {
/* Allocate SIZE bytes of memory. */
extern __malloc_ptr_t malloc __MALLOC_P ((size_t __size)) __attribute_malloc__;
/* 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));
/* 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)) __attribute_malloc__;
/* 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));
/* Release all but __pad bytes of freed top-most memory back to the
system. Return 1 if successful, else 0. */
extern int malloc_trim(size_t pad);
#include <stdio.h>
/* Prints brief summary statistics to the specified file.
* Writes to stderr if file is NULL. */
extern void malloc_stats(FILE *file);
/* SVID2/XPG mallopt options */
#ifndef M_MXFAST
# define M_MXFAST 1 /* UNUSED in this malloc */
#ifndef M_NLBLKS
# define M_NLBLKS 2 /* UNUSED in this malloc */
#ifndef M_GRAIN
# define M_GRAIN 3 /* UNUSED in this malloc */
#ifndef M_KEEP
# define M_KEEP 4 /* UNUSED in this malloc */
/* mallopt options that actually do something */
#define M_TOP_PAD -2
#define M_MMAP_MAX -4
#define M_CHECK_ACTION -5
#define M_PERTURB -6
/* General SVID/XPG interface to tunable parameters. */
extern int mallopt __MALLOC_P ((int __param, int __val));
#endif /* __MALLOC_STANDARD__ */
/* uClibc may use malloc internally in situations where user can not be
* notified about out-of-memory condition. In this situation uClibc will
* call __uc_malloc_failed if it is non-NULL, and retry allocation
* if it returns. If __uc_malloc_failed is NULL, uclibc will _exit(1).
* NB: do not use stdio in __uc_malloc_failed handler! */
extern void *__uc_malloc(size_t size);
extern void (*__uc_malloc_failed)(size_t size);
#ifdef __cplusplus
} /* end of extern "C" */
#endif /* malloc.h */