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- /* Prototypes and definition for malloc implementation.
- Copyright (C) 1996, 1997, 1999, 2000, 2002-2004, 2005, 2007, 2009
- 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>
- #include <stddef.h>
- #include <stdio.h>
- # define __malloc_ptr_t void *
-
- /* Used by GNU libc internals. */
- #define __malloc_size_t size_t
- #define __malloc_ptrdiff_t ptrdiff_t
-
- #ifdef __GNUC__
-
- # 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 __MALLOC_P(args) args
- # define __MALLOC_PMT(args) args
-
- #endif /* GCC. */
-
-
- __BEGIN_DECLS
-
- /* Allocate SIZE bytes of memory. */
- extern void *malloc __MALLOC_P ((size_t __size)) __attribute_malloc__ __wur;
-
- /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
- extern void *calloc __MALLOC_P ((size_t __nmemb, size_t __size))
- __attribute_malloc__ __wur;
-
- /* Re-allocate the previously allocated block in __ptr, making the new
- block SIZE bytes long. */
- /* __attribute_malloc__ is not used, because if realloc returns
- the same pointer that was passed to it, aliasing needs to be allowed
- between objects pointed by the old and new pointers. */
- extern void *realloc __MALLOC_P ((void *__ptr, size_t __size))
- __attribute_warn_unused_result__;
-
- /* Free a block allocated by `malloc', `realloc' or `calloc'. */
- extern void free __MALLOC_P ((void *__ptr));
-
- /* Free a block allocated by `calloc'. */
- extern void cfree __MALLOC_P ((void *__ptr));
-
- /* Allocate SIZE bytes allocated to ALIGNMENT bytes. */
- extern void *memalign __MALLOC_P ((size_t __alignment, size_t __size))
- __attribute_malloc__ __wur;
-
- /* Allocate SIZE bytes on a page boundary. */
- extern void *valloc __MALLOC_P ((size_t __size))
- __attribute_malloc__ __wur;
-
- /* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up
- __size to nearest pagesize. */
- extern void * pvalloc __MALLOC_P ((size_t __size))
- __attribute_malloc__ __wur;
-
- /* Underlying allocation function; successive calls should return
- contiguous pieces of memory. */
- extern void *(*__morecore) __MALLOC_PMT ((ptrdiff_t __size));
-
- /* Default value of `__morecore'. */
- extern void *__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
- #define M_PERTURB -6
- #define M_ARENA_TEST -7
- #define M_ARENA_MAX -8
-
- /* 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 ((void *__ptr));
-
- /* Prints brief summary statistics on stderr. */
- extern void malloc_stats __MALLOC_P ((void));
-
- /* Output information about state of allocator to stream FP. */
- extern int malloc_info (int __options, FILE *__fp);
-
- /* Record the state of all malloc variables in an opaque data structure. */
- extern void *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 ((void *__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 ((void *__ptr,
- __const __malloc_ptr_t));
- extern void *(*__malloc_hook) __MALLOC_PMT ((size_t __size,
- __const __malloc_ptr_t));
- extern void *(*__realloc_hook) __MALLOC_PMT ((void *__ptr, size_t __size,
- __const __malloc_ptr_t));
- extern void *(*__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));
-
-
- __END_DECLS
-
- #endif /* malloc.h */
-