1/* Prototypes and definition for malloc implementation. 2 Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20#ifndef _MALLOC_H 21#define _MALLOC_H 1 22 23#include <features.h> 24 25/* 26 `ptmalloc', a malloc implementation for multiple threads without 27 lock contention, by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>. 28 See the files `ptmalloc.c' or `COPYRIGHT' for copying conditions. 29 30 VERSION 2.6.4-pt Wed Dec 4 00:35:54 MET 1996 31 32 This work is mainly derived from malloc-2.6.4 by Doug Lea 33 <dl@cs.oswego.edu>, which is available from: 34 35 ftp://g.oswego.edu/pub/misc/malloc.c 36 37 This trimmed-down header file only provides function prototypes and 38 the exported data structures. For more detailed function 39 descriptions and compile-time options, see the source file 40 `ptmalloc.c'. 41*/ 42 43#if defined(__STDC__) || defined (__cplusplus) 44# include <stddef.h> 45# define __malloc_ptr_t void * 46#else 47# undef size_t 48# define size_t unsigned int 49# undef ptrdiff_t 50# define ptrdiff_t int 51# define __malloc_ptr_t char * 52#endif 53 54#if !defined __attribute_malloc__ 55# define __attribute_malloc__ 56#endif 57 58#ifdef __GNUC__ 59 60/* GCC can always grok prototypes. For C++ programs we add throw() 61 to help it optimize the function calls. But this works only with 62 gcc 2.8.x and egcs. */ 63#ifndef __THROW 64# if defined __cplusplus && (__GNUC__ >= 3 || __GNUC_MINOR__ >= 8) 65# define __THROW throw () 66# else 67# define __THROW 68# endif 69#endif 70# define __MALLOC_P(args) args __THROW 71/* This macro will be used for functions which might take C++ callback 72 functions. */ 73# define __MALLOC_PMT(args) args 74 75#else /* Not GCC. */ 76 77# define __THROW 78 79# if (defined __STDC__ && __STDC__) || defined __cplusplus 80 81# define __MALLOC_P(args) args 82# define __MALLOC_PMT(args) args 83 84# else /* Not ANSI C or C++. */ 85 86# define __MALLOC_P(args) () /* No prototypes. */ 87# define __MALLOC_PMT(args) () 88 89# endif /* ANSI C or C++. */ 90 91#endif /* GCC. */ 92 93#ifndef NULL 94# ifdef __cplusplus 95# define NULL 0 96# else 97# define NULL ((__malloc_ptr_t) 0) 98# endif 99#endif 100 101#ifdef __cplusplus 102extern "C" { 103#endif 104 105/* Allocate SIZE bytes of memory. */ 106extern __malloc_ptr_t malloc __MALLOC_P ((size_t __size)) __attribute_malloc__; 107 108/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ 109extern __malloc_ptr_t calloc __MALLOC_P ((size_t __nmemb, size_t __size)) 110 __attribute_malloc__; 111 112/* Re-allocate the previously allocated block in __ptr, making the new 113 block SIZE bytes long. */ 114extern __malloc_ptr_t realloc __MALLOC_P ((__malloc_ptr_t __ptr, 115 size_t __size)) 116 __attribute_malloc__; 117 118/* Free a block allocated by `malloc', `realloc' or `calloc'. */ 119extern void free __MALLOC_P ((__malloc_ptr_t __ptr)); 120 121/* Allocate SIZE bytes allocated to ALIGNMENT bytes. */ 122extern __malloc_ptr_t memalign __MALLOC_P ((size_t __alignment, size_t __size)); 123 124/* Allocate SIZE bytes on a page boundary. */ 125extern __malloc_ptr_t valloc __MALLOC_P ((size_t __size)) __attribute_malloc__; 126 127#ifdef __MALLOC_STANDARD__ 128 129/* SVID2/XPG mallinfo structure */ 130struct mallinfo { 131 int arena; /* total space allocated from system */ 132 int ordblks; /* number of non-inuse chunks */ 133 int smblks; /* unused -- always zero */ 134 int hblks; /* number of mmapped regions */ 135 int hblkhd; /* total space in mmapped regions */ 136 int usmblks; /* unused -- always zero */ 137 int fsmblks; /* unused -- always zero */ 138 int uordblks; /* total allocated space */ 139 int fordblks; /* total non-inuse space */ 140 int keepcost; /* top-most, releasable (via malloc_trim) space */ 141}; 142 143/* Returns a copy of the updated current mallinfo. */ 144extern struct mallinfo mallinfo __MALLOC_P ((void)); 145 146/* Release all but __pad bytes of freed top-most memory back to the 147 system. Return 1 if successful, else 0. */ 148extern int malloc_trim(size_t pad); 149 150#include <stdio.h> 151/* Prints brief summary statistics to the specified file. 152 * Writes to stderr if file is NULL. */ 153extern void malloc_stats(FILE *file); 154 155/* SVID2/XPG mallopt options */ 156#ifndef M_MXFAST 157# define M_MXFAST 1 /* UNUSED in this malloc */ 158#endif 159#ifndef M_NLBLKS 160# define M_NLBLKS 2 /* UNUSED in this malloc */ 161#endif 162#ifndef M_GRAIN 163# define M_GRAIN 3 /* UNUSED in this malloc */ 164#endif 165#ifndef M_KEEP 166# define M_KEEP 4 /* UNUSED in this malloc */ 167#endif 168 169/* mallopt options that actually do something */ 170#define M_TRIM_THRESHOLD -1 171#define M_TOP_PAD -2 172#define M_MMAP_THRESHOLD -3 173#define M_MMAP_MAX -4 174#define M_CHECK_ACTION -5 175#define M_PERTURB -6 176 177/* General SVID/XPG interface to tunable parameters. */ 178extern int mallopt __MALLOC_P ((int __param, int __val)); 179 180#endif /* __MALLOC_STANDARD__ */ 181 182/* uClibc may use malloc internally in situations where user can not be 183 * notified about out-of-memory condition. In this situation uClibc will 184 * call __uc_malloc_failed if it is non-NULL, and retry allocation 185 * if it returns. If __uc_malloc_failed is NULL, uclibc will _exit(1). 186 * NB: do not use stdio in __uc_malloc_failed handler! */ 187extern void *__uc_malloc(size_t size); 188extern void (*__uc_malloc_failed)(size_t size); 189 190#ifdef __cplusplus 191} /* end of extern "C" */ 192#endif 193 194#endif /* malloc.h */ 195