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Diffstat (limited to 'malloc/malloc.h')
| -rw-r--r-- | malloc/malloc.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/malloc/malloc.h b/malloc/malloc.h new file mode 100644 index 0000000..57f6e33 --- /dev/null +++ b/malloc/malloc.h @@ -0,0 +1,169 @@ +/* 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 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(_PTMALLOC_H_) */ |