267 lines
9.1 KiB
C
267 lines
9.1 KiB
C
/* 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
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
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 <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
|
|
#elif !defined __attribute_malloc__
|
|
# define __attribute_malloc__
|
|
#endif
|
|
|
|
#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. */
|
|
# 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
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct _reent;
|
|
|
|
/* Nonzero if the malloc is already initialized. */
|
|
#ifdef _LIBC
|
|
/* In the GNU libc we rename the global variable
|
|
`__malloc_initialized' to `__libc_malloc_initialized'. */
|
|
# define __malloc_initialized __libc_malloc_initialized
|
|
#endif
|
|
extern int __malloc_initialized;
|
|
|
|
/* 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)) __attribute_malloc__;
|
|
extern __malloc_ptr_t _malloc_r __MALLOC_P ((struct _reent * __r, 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))
|
|
__attribute_malloc__;
|
|
extern __malloc_ptr_t _calloc_r __MALLOC_P ((struct _reent * __r,
|
|
size_t __nmemb, size_t __size))
|
|
__attribute_malloc__;
|
|
|
|
/* 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))
|
|
__attribute_malloc__;
|
|
extern __malloc_ptr_t _realloc_r __MALLOC_P ((struct _reent * __r,
|
|
__malloc_ptr_t __ptr,
|
|
size_t __size))
|
|
__attribute_malloc__;
|
|
|
|
/* Free a block allocated by `malloc', `realloc' or `calloc'. */
|
|
extern void free __MALLOC_P ((__malloc_ptr_t __ptr));
|
|
extern void _free_r __MALLOC_P ((struct _reent * __r, __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));
|
|
extern __malloc_ptr_t _memalign_r __MALLOC_P ((struct _reent *__r,
|
|
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__;
|
|
extern __malloc_ptr_t _valloc_r __MALLOC_P ((struct _reent *__r,
|
|
size_t __size))
|
|
__attribute_malloc__;
|
|
|
|
/* 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))
|
|
__attribute_malloc__;
|
|
extern __malloc_ptr_t _pvalloc_r __MALLOC_P ((struct _reent *__r,
|
|
size_t __size))
|
|
__attribute_malloc__;
|
|
|
|
/* Underlying allocation function; successive calls should return
|
|
contiguous pieces of memory. */
|
|
extern __malloc_ptr_t (*__morecore) __MALLOC_PMT ((ptrdiff_t __size));
|
|
|
|
/* Default value of `__morecore'. */
|
|
extern __malloc_ptr_t __default_morecore __MALLOC_P ((ptrdiff_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));
|
|
extern struct mallinfo _mallinfo_r __MALLOC_P ((struct _reent *__r));
|
|
|
|
/* 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
|
|
#define M_CHECK_ACTION -5
|
|
|
|
/* General SVID/XPG interface to tunable parameters. */
|
|
extern int mallopt __MALLOC_P ((int __param, int __val));
|
|
extern int _mallopt_r __MALLOC_P ((struct _reent *__r, 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));
|
|
extern void _malloc_stats_r __MALLOC_P ((struct _reent *__r));
|
|
|
|
/* Record the state of all malloc variables in an opaque data structure. */
|
|
extern __malloc_ptr_t malloc_get_state __MALLOC_P ((void));
|
|
|
|
/* Restore the state of all malloc variables from data obtained with
|
|
malloc_get_state(). */
|
|
extern int malloc_set_state __MALLOC_P ((__malloc_ptr_t __ptr));
|
|
|
|
#if defined __GLIBC__ || defined MALLOC_HOOKS
|
|
/* Called once when malloc is initialized; redefining this variable in
|
|
the application provides the preferred way to set up the hook
|
|
pointers. */
|
|
extern void (*__malloc_initialize_hook) __MALLOC_PMT ((void));
|
|
/* Hooks for debugging and user-defined versions. */
|
|
extern void (*__free_hook) __MALLOC_PMT ((__malloc_ptr_t __ptr,
|
|
__const __malloc_ptr_t));
|
|
extern __malloc_ptr_t (*__malloc_hook) __MALLOC_PMT ((size_t __size,
|
|
__const __malloc_ptr_t));
|
|
extern __malloc_ptr_t (*__realloc_hook) __MALLOC_PMT ((__malloc_ptr_t __ptr,
|
|
size_t __size,
|
|
__const __malloc_ptr_t));
|
|
extern __malloc_ptr_t (*__memalign_hook) __MALLOC_PMT ((size_t __alignment,
|
|
size_t __size,
|
|
__const __malloc_ptr_t));
|
|
extern void (*__after_morecore_hook) __MALLOC_PMT ((void));
|
|
|
|
/* Activate a standard set of debugging hooks. */
|
|
extern void __malloc_check_init __MALLOC_P ((void));
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}; /* end of extern "C" */
|
|
#endif
|
|
|
|
#endif /* malloc.h */
|