1: /* Prototypes and definition for malloc implementation.
    2:    Copyright (C) 1996, 1997, 1999, 2000, 2002-2004, 2005, 2007
    3:    Free Software Foundation, Inc.
    4:    This file is part of the GNU C Library.
    5: 
    6:    The GNU C Library is free software; you can redistribute it and/or
    7:    modify it under the terms of the GNU Lesser General Public
    8:    License as published by the Free Software Foundation; either
    9:    version 2.1 of the License, or (at your option) any later version.
   10: 
   11:    The GNU C Library is distributed in the hope that it will be useful,
   12:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   13:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14:    Lesser General Public License for more details.
   15: 
   16:    You should have received a copy of the GNU Lesser General Public
   17:    License along with the GNU C Library; if not, write to the Free
   18:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   19:    02111-1307 USA.  */
   20: 
   21: #ifndef _MALLOC_H
   22: #define _MALLOC_H 1
   23: 
   24: #include <features.h>
   25: #include <stddef.h>
   26: # define __malloc_ptr_t  void *
   27: 
   28: /* Used by GNU libc internals. */
   29: #define __malloc_size_t size_t
   30: #define __malloc_ptrdiff_t ptrdiff_t
   31: 
   32: #ifdef __GNUC__
   33: 
   34: # define __MALLOC_P(args)       args __THROW
   35: /* This macro will be used for functions which might take C++ callback
   36:    functions.  */
   37: # define __MALLOC_PMT(args)     args
   38: 
   39: #else   /* Not GCC.  */
   40: 
   41: # define __MALLOC_P(args)       args
   42: # define __MALLOC_PMT(args)     args
   43: 
   44: #endif  /* GCC.  */
   45: 
   46: 
   47: __BEGIN_DECLS
   48: 
   49: /* Allocate SIZE bytes of memory.  */
   50: extern void *malloc __MALLOC_P ((size_t __size)) __attribute_malloc__ __wur;
   51: 
   52: /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
   53: extern void *calloc __MALLOC_P ((size_t __nmemb, size_t __size))
   54:        __attribute_malloc__ __wur;
   55: 
   56: /* Re-allocate the previously allocated block in __ptr, making the new
   57:    block SIZE bytes long.  */
   58: /* __attribute_malloc__ is not used, because if realloc returns
   59:    the same pointer that was passed to it, aliasing needs to be allowed
   60:    between objects pointed by the old and new pointers.  */
   61: extern void *realloc __MALLOC_P ((void *__ptr, size_t __size))
   62:        __attribute_warn_unused_result__;
   63: 
   64: /* Free a block allocated by `malloc', `realloc' or `calloc'.  */
   65: extern void free __MALLOC_P ((void *__ptr));
   66: 
   67: /* Free a block allocated by `calloc'. */
   68: extern void cfree __MALLOC_P ((void *__ptr));
   69: 
   70: /* Allocate SIZE bytes allocated to ALIGNMENT bytes.  */
   71: extern void *memalign __MALLOC_P ((size_t __alignment, size_t __size))
   72:        __attribute_malloc__ __wur;
   73: 
   74: /* Allocate SIZE bytes on a page boundary.  */
   75: extern void *valloc __MALLOC_P ((size_t __size))
   76:        __attribute_malloc__ __wur;
   77: 
   78: /* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up
   79:    __size to nearest pagesize. */
   80: extern void * pvalloc __MALLOC_P ((size_t __size))
   81:        __attribute_malloc__ __wur;
   82: 
   83: /* Underlying allocation function; successive calls should return
   84:    contiguous pieces of memory.  */
   85: extern void *(*__morecore) __MALLOC_PMT ((ptrdiff_t __size));
   86: 
   87: /* Default value of `__morecore'.  */
   88: extern void *__default_morecore __MALLOC_P ((ptrdiff_t __size))
   89:        __attribute_malloc__;
   90: 
   91: /* SVID2/XPG mallinfo structure */
   92: 
   93: struct mallinfo {
   94:   int arena;    /* non-mmapped space allocated from system */
   95:   int ordblks;  /* number of free chunks */
   96:   int smblks;   /* number of fastbin blocks */
   97:   int hblks;    /* number of mmapped regions */
   98:   int hblkhd;   /* space in mmapped regions */
   99:   int usmblks;  /* maximum total allocated space */
  100:   int fsmblks;  /* space available in freed fastbin blocks */
  101:   int uordblks; /* total allocated space */
  102:   int fordblks; /* total free space */
  103:   int keepcost; /* top-most, releasable (via malloc_trim) space */
  104: };
  105: 
  106: /* Returns a copy of the updated current mallinfo. */
  107: extern struct mallinfo mallinfo __MALLOC_P ((void));
  108: 
  109: /* SVID2/XPG mallopt options */
  110: #ifndef M_MXFAST
  111: # define M_MXFAST  1    /* maximum request size for "fastbins" */
  112: #endif
  113: #ifndef M_NLBLKS
  114: # define M_NLBLKS  2    /* UNUSED in this malloc */
  115: #endif
  116: #ifndef M_GRAIN
  117: # define M_GRAIN   3    /* UNUSED in this malloc */
  118: #endif
  119: #ifndef M_KEEP
  120: # define M_KEEP    4    /* UNUSED in this malloc */
  121: #endif
  122: 
  123: /* mallopt options that actually do something */
  124: #define M_TRIM_THRESHOLD    -1
  125: #define M_TOP_PAD           -2
  126: #define M_MMAP_THRESHOLD    -3
  127: #define M_MMAP_MAX          -4
  128: #define M_CHECK_ACTION      -5
  129: #define M_PERTURB           -6
  130: 
  131: /* General SVID/XPG interface to tunable parameters. */
  132: extern int mallopt __MALLOC_P ((int __param, int __val));
  133: 
  134: /* Release all but __pad bytes of freed top-most memory back to the
  135:    system. Return 1 if successful, else 0. */
  136: extern int malloc_trim __MALLOC_P ((size_t __pad));
  137: 
  138: /* Report the number of usable allocated bytes associated with allocated
  139:    chunk __ptr. */
  140: extern size_t malloc_usable_size __MALLOC_P ((void *__ptr));
  141: 
  142: /* Prints brief summary statistics on stderr. */
  143: extern void malloc_stats __MALLOC_P ((void));
  144: 
  145: /* Record the state of all malloc variables in an opaque data structure. */
  146: extern void *malloc_get_state __MALLOC_P ((void));
  147: 
  148: /* Restore the state of all malloc variables from data obtained with
  149:    malloc_get_state(). */
  150: extern int malloc_set_state __MALLOC_P ((void *__ptr));
  151: 
  152: /* Called once when malloc is initialized; redefining this variable in
  153:    the application provides the preferred way to set up the hook
  154:    pointers. */
  155: extern void (*__malloc_initialize_hook) __MALLOC_PMT ((void));
  156: /* Hooks for debugging and user-defined versions. */
  157: extern void (*__free_hook) __MALLOC_PMT ((void *__ptr,
  158:                                         __const __malloc_ptr_t));
  159: extern void *(*__malloc_hook) __MALLOC_PMT ((size_t __size,
  160:                                              __const __malloc_ptr_t));
  161: extern void *(*__realloc_hook) __MALLOC_PMT ((void *__ptr, size_t __size,
  162:                                               __const __malloc_ptr_t));
  163: extern void *(*__memalign_hook) __MALLOC_PMT ((size_t __alignment,
  164:                                                size_t __size,
  165:                                                __const __malloc_ptr_t));
  166: extern void (*__after_morecore_hook) __MALLOC_PMT ((void));
  167: 
  168: /* Activate a standard set of debugging hooks. */
  169: extern void __malloc_check_init __MALLOC_P ((void));
  170: 
  171: 
  172: __END_DECLS
  173: 
  174: #endif /* malloc.h */