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git.ipfire.org Git - thirdparty/bash.git/blob - lib/malloc/imalloc.h
1 /* imalloc.h -- internal malloc definitions shared by source files. */
3 /* Copyright (C) 2001-2003 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
21 /* Must be included *after* config.h */
29 #define MALLOC_REGISTER
33 #define MALLOC_WRAPFUNCS
35 /* Generic pointer type. */
37 # if defined (__STDC__)
48 #if !defined (CPP_STRING)
49 # if defined (HAVE_STRINGIZE)
50 # define CPP_STRING(x) #x
52 # define CPP_STRING(x) "x"
53 # endif /* !HAVE_STRINGIZE */
54 #endif /* !__STRING */
57 # define FASTCOPY(s, d, n) __builtin_memcpy (d, s, n)
59 # if !defined (HAVE_BCOPY)
60 # if !defined (HAVE_MEMMOVE)
61 # define FASTCOPY(s, d, n) memcpy (d, s, n)
63 # define FASTCOPY(s, d, n) memmove (d, s, n)
64 # endif /* !HAVE_MEMMOVE */
65 # else /* HAVE_BCOPY */
66 # define FASTCOPY(s, d, n) bcopy (s, d, n)
67 # endif /* HAVE_BCOPY */
68 #endif /* !__GNUC__ */
71 # if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus) || defined (PROTOTYPES)
72 # define __P(protos) protos
74 # define __P(protos) ()
78 /* Use Duff's device for good zeroing/copying performance. DO NOT call the
79 Duff's device macros with NBYTES == 0. */
81 #define MALLOC_BZERO(charp, nbytes) \
83 if ((nbytes) <= 32) { \
84 size_t * mzp = (size_t *)(charp); \
85 unsigned long mctmp = (nbytes)/sizeof(size_t); \
87 if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
89 case 0: for(;;) { *mzp++ = 0; \
96 case 1: *mzp++ = 0; if(mcn <= 0) break; mcn--; } \
99 memset ((charp), 0, (nbytes)); \
102 #define MALLOC_ZERO(charp, nbytes) \
104 size_t mzsz = (nbytes); \
105 if (mzsz <= 9 * sizeof(mzsz) { \
106 size_t *mz = (size_t *)(charp); \
107 if(mzsz >= 5*sizeof(mzsz)) { *mz++ = 0; \
109 if(mzsz >= 7*sizeof(mzsz)) { *mz++ = 0; \
111 if(mzsz >= 9*sizeof(mzsz)) { *mz++ = 0; \
117 memset ((charp), 0, mzsz); \
120 #define MALLOC_MEMSET(charp, xch, nbytes) \
122 if ((nbytes) <= 32) { \
123 register char * mzp = (charp); \
124 unsigned long mctmp = (nbytes); \
126 if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
128 case 0: for(;;) { *mzp++ = xch; \
129 case 7: *mzp++ = xch; \
130 case 6: *mzp++ = xch; \
131 case 5: *mzp++ = xch; \
132 case 4: *mzp++ = xch; \
133 case 3: *mzp++ = xch; \
134 case 2: *mzp++ = xch; \
135 case 1: *mzp++ = xch; if(mcn <= 0) break; mcn--; } \
138 memset ((charp), (xch), (nbytes)); \
141 #define MALLOC_MEMCPY(dest,src,nbytes) \
143 if ((nbytes) <= 32) { \
144 size_t* mcsrc = (size_t*) src; \
145 size_t* mcdst = (size_t*) dest; \
146 unsigned long mctmp = (nbytes)/sizeof(size_t); \
148 if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
150 case 0: for(;;) { *mcdst++ = *mcsrc++; \
151 case 7: *mcdst++ = *mcsrc++; \
152 case 6: *mcdst++ = *mcsrc++; \
153 case 5: *mcdst++ = *mcsrc++; \
154 case 4: *mcdst++ = *mcsrc++; \
155 case 3: *mcdst++ = *mcsrc++; \
156 case 2: *mcdst++ = *mcsrc++; \
157 case 1: *mcdst++ = *mcsrc++; if(mcn <= 0) break; mcn--; } \
159 memcpy ((dest), (src), (nbytes)) \
163 # include "bashintl.h"
170 extern void _malloc_block_signals
__P((sigset_t
*, sigset_t
*));
171 extern void _malloc_unblock_signals
__P((sigset_t
*, sigset_t
*));
173 #endif /* _IMALLOC_H */