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/* imalloc.h -- internal malloc definitions shared by source files. */
/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
/* Must be included *after* config.h */
#ifndef _IMALLOC_H
#define _IMALLOC_H
#ifdef MALLOC_DEBUG
#define MALLOC_STATS
#define MALLOC_TRACE
#define MALLOC_REGISTER
#define MALLOC_WATCH
#endif
#define MALLOC_WRAPFUNCS
/* If defined, as it is by default, use the lesscore() function to attempt
to reduce the top of the heap when freeing memory blocks larger than a
defined threshold. */
#define USE_LESSCORE
/* Generic pointer type. */
#ifndef PTR_T
# if defined (__STDC__)
# define PTR_T void *
# else
# define PTR_T char *
# endif
#endif
#if !defined (NULL)
# define NULL 0
#endif
#if !defined (CPP_STRING)
# if defined (HAVE_STRINGIZE)
# define CPP_STRING(x) #x
# else
# define CPP_STRING(x) "x"
# endif /* !HAVE_STRINGIZE */
#endif /* !__STRING */
#if __GNUC__ > 1
# define FASTCOPY(s, d, n) __builtin_memcpy (d, s, n)
#else /* !__GNUC__ */
# if !defined (HAVE_BCOPY)
# if !defined (HAVE_MEMMOVE)
# define FASTCOPY(s, d, n) memcpy (d, s, n)
# else
# define FASTCOPY(s, d, n) memmove (d, s, n)
# endif /* !HAVE_MEMMOVE */
# else /* HAVE_BCOPY */
# define FASTCOPY(s, d, n) bcopy (s, d, n)
# endif /* HAVE_BCOPY */
#endif /* !__GNUC__ */
#if !defined (PARAMS)
# if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus) || defined (PROTOTYPES)
# define PARAMS(protos) protos
# else
# define PARAMS(protos) ()
# endif
#endif
/* Use Duff's device for good zeroing/copying performance. DO NOT call the
Duff's device macros with NBYTES == 0. */
#define MALLOC_BZERO(charp, nbytes) \
do { \
if ((nbytes) <= 32) { \
size_t * mzp = (size_t *)(charp); \
unsigned long mctmp = (nbytes)/sizeof(size_t); \
long mcn; \
if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
switch (mctmp) { \
case 0: for(;;) { *mzp++ = 0; \
case 7: *mzp++ = 0; \
case 6: *mzp++ = 0; \
case 5: *mzp++ = 0; \
case 4: *mzp++ = 0; \
case 3: *mzp++ = 0; \
case 2: *mzp++ = 0; \
case 1: *mzp++ = 0; if(mcn <= 0) break; mcn--; } \
} \
else \
memset ((charp), 0, (nbytes)); \
} while(0)
#define MALLOC_ZERO(charp, nbytes) \
do { \
size_t mzsz = (nbytes); \
if (mzsz <= 9 * sizeof(mzsz) { \
size_t *mz = (size_t *)(charp); \
if(mzsz >= 5*sizeof(mzsz)) { *mz++ = 0; \
*mz++ = 0; \
if(mzsz >= 7*sizeof(mzsz)) { *mz++ = 0; \
*mz++ = 0; \
if(mzsz >= 9*sizeof(mzsz)) { *mz++ = 0; \
*mz++ = 0; }}} \
*mz++ = 0; \
*mz++ = 0; \
*mz = 0; \
} else \
memset ((charp), 0, mzsz); \
} while (0)
#define MALLOC_MEMSET(charp, xch, nbytes) \
do { \
if ((nbytes) <= 32) { \
register char * mzp = (charp); \
unsigned long mctmp = (nbytes); \
register long mcn; \
if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
switch (mctmp) { \
case 0: for(;;) { *mzp++ = xch; \
case 7: *mzp++ = xch; \
case 6: *mzp++ = xch; \
case 5: *mzp++ = xch; \
case 4: *mzp++ = xch; \
case 3: *mzp++ = xch; \
case 2: *mzp++ = xch; \
case 1: *mzp++ = xch; if(mcn <= 0) break; mcn--; } \
} \
} else \
memset ((charp), (xch), (nbytes)); \
} while(0)
#define MALLOC_MEMCPY(dest,src,nbytes) \
do { \
if ((nbytes) <= 32) { \
size_t* mcsrc = (size_t*) src; \
size_t* mcdst = (size_t*) dest; \
unsigned long mctmp = (nbytes)/sizeof(size_t); \
long mcn; \
if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
switch (mctmp) { \
case 0: for(;;) { *mcdst++ = *mcsrc++; \
case 7: *mcdst++ = *mcsrc++; \
case 6: *mcdst++ = *mcsrc++; \
case 5: *mcdst++ = *mcsrc++; \
case 4: *mcdst++ = *mcsrc++; \
case 3: *mcdst++ = *mcsrc++; \
case 2: *mcdst++ = *mcsrc++; \
case 1: *mcdst++ = *mcsrc++; if(mcn <= 0) break; mcn--; } \
} else \
memcpy ((dest), (src), (nbytes)) \
} while(0)
#if defined (SHELL)
# include "bashintl.h"
#else
# define _(x) x
#endif
#include <signal.h>
extern void _malloc_block_signals PARAMS((sigset_t *, sigset_t *));
extern void _malloc_unblock_signals PARAMS((sigset_t *, sigset_t *));
#endif /* _IMALLOC_H */
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