malloc.h
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- /* Prototypes and definition for malloc implementation.
- Copyright (C) 1996,97,99,2000,2002,2003,2004 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>
- /*
- $Id: malloc.h,v 1.26.4.1 2005/02/16 10:16:11 roland Exp $
- `ptmalloc2', a malloc implementation for multiple threads without
- lock contention, by Wolfram Gloger <wg@malloc.de>.
- VERSION 2.7.0
- This work is mainly derived from malloc-2.7.0 by Doug Lea
- <dl@cs.oswego.edu>, which is available from:
- ftp://gee.cs.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
- `malloc.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. */
- # ifndef __THROW
- # if defined __cplusplus && (__GNUC__ >= 3 || __GNUC_MINOR__ >= 8)
- # define __THROW throw ()
- # else
- # define __THROW
- # endif
- # 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
- # ifndef __const
- # define __const const
- # endif
- # else /* Not ANSI C or C++. */
- # define __MALLOC_P(args) () /* No prototypes. */
- # define __MALLOC_PMT(args) ()
- # ifndef __const
- # define __const
- # endif
- # 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
- /* 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))
- __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__;
- /* 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)) __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__;
- /* 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; /* non-mmapped space allocated from system */
- int ordblks; /* number of free chunks */
- int smblks; /* number of fastbin blocks */
- int hblks; /* number of mmapped regions */
- int hblkhd; /* space in mmapped regions */
- int usmblks; /* maximum total allocated space */
- int fsmblks; /* space available in freed fastbin blocks */
- int uordblks; /* total allocated space */
- int fordblks; /* total free 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 /* maximum request size for "fastbins" */
- #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));
- /* 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));
- /* 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));
- /* 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));
- #ifdef __cplusplus
- } /* end of extern "C" */
- #endif
- #endif /* malloc.h */