1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2010. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
/* Same order as the ordering of terms in erlang */
/* Since there are 255 different External tag values to choose from
There is no reason to not be extravagant.
Hence, the different tags for large/small tuple e.t.c
*/
#ifdef ERTS_WANT_EXTERNAL_TAGS
#ifndef ERTS_EXTERNAL_TAGS
#define ERTS_EXTERNAL_TAGS
#define SMALL_INTEGER_EXT 'a'
#define INTEGER_EXT 'b'
#define FLOAT_EXT 'c'
#define ATOM_EXT 'd'
#define SMALL_ATOM_EXT 's'
#define REFERENCE_EXT 'e'
#define NEW_REFERENCE_EXT 'r'
#define PORT_EXT 'f'
#define NEW_FLOAT_EXT 'F'
#define PID_EXT 'g'
#define SMALL_TUPLE_EXT 'h'
#define LARGE_TUPLE_EXT 'i'
#define NIL_EXT 'j'
#define STRING_EXT 'k'
#define LIST_EXT 'l'
#define BINARY_EXT 'm'
#define BIT_BINARY_EXT 'M'
#define SMALL_BIG_EXT 'n'
#define LARGE_BIG_EXT 'o'
#define NEW_FUN_EXT 'p'
#define EXPORT_EXT 'q'
#define FUN_EXT 'u'
#define DIST_HEADER 'D'
#define ATOM_CACHE_REF 'R'
#define COMPRESSED 'P'
#if 0
/* Not used anymore */
#define CACHED_ATOM 'C'
#define NEW_CACHE 'N'
#endif
#define VERSION_MAGIC 131 /* 130 in erlang 4.2 */
/* Increment this when changing the external format. */
/* ON the other hand, don't change the external format */
/* since that breaks other people's code! */
#endif /* ERTS_EXTERNAL_TAGS */
#endif /* ERTS_WANT_EXTERNAL_TAGS */
#ifndef ERL_EXTERNAL_H__
#define ERL_EXTERNAL_H__
#include "erl_node_tables.h"
#define ERTS_ATOM_CACHE_SIZE 2048
typedef struct cache {
Eterm in_arr[ERTS_ATOM_CACHE_SIZE];
Eterm out_arr[ERTS_ATOM_CACHE_SIZE];
} ErtsAtomCache;
typedef struct {
int hdr_sz;
int sz;
int cix[ERTS_ATOM_CACHE_SIZE];
struct {
Eterm atom;
int iix;
} cache[ERTS_ATOM_CACHE_SIZE];
} ErtsAtomCacheMap;
typedef struct {
Uint32 size;
Eterm atom[ERTS_ATOM_CACHE_SIZE];
} ErtsAtomTranslationTable;
/*
* These flags are tagged onto the high bits of a connection ID and stored in
* the ErtsDistExternal structure's flags field. They are used to indicate
* various bits of state necessary to decode binaries in a variety of
* scenarios. The mask ERTS_DIST_EXT_CON_ID_MASK is used later to separate the
* connection ID from the flags. Be careful to ensure that the mask does not
* overlap any of the bits used for flags, or ERTS will leak flags bits into
* connection IDs and leak connection ID bits into the flags.
*/
#define ERTS_DIST_EXT_DFLAG_HDR ((Uint32) 0x80000000)
#define ERTS_DIST_EXT_ATOM_TRANS_TAB ((Uint32) 0x40000000)
#define ERTS_DIST_EXT_BTT_SAFE ((Uint32) 0x20000000)
#define ERTS_DIST_EXT_CON_ID_MASK ((Uint32) 0x1fffffff)
#define ERTS_DIST_EXT_CON_ID(DIST_EXTP) \
((DIST_EXTP)->flags & ERTS_DIST_EXT_CON_ID_MASK)
typedef struct {
DistEntry *dep;
byte *extp;
byte *ext_endp;
Sint heap_size;
Uint32 flags;
ErtsAtomTranslationTable attab;
} ErtsDistExternal;
typedef struct {
int have_header;
int cache_entries;
} ErtsDistHeaderPeek;
#define ERTS_DIST_EXT_SIZE(EDEP) \
(sizeof(ErtsDistExternal) \
- (((EDEP)->flags & ERTS_DIST_EXT_ATOM_TRANS_TAB) \
? (ASSERT_EXPR(0 <= (EDEP)->attab.size \
&& (EDEP)->attab.size <= ERTS_ATOM_CACHE_SIZE), \
sizeof(Eterm)*(ERTS_ATOM_CACHE_SIZE - (EDEP)->attab.size)) \
: sizeof(ErtsAtomTranslationTable)))
typedef struct {
byte *extp;
int exttmp;
} ErtsBinary2TermState;
/* -------------------------------------------------------------------------- */
void erts_init_atom_cache_map(ErtsAtomCacheMap *);
void erts_reset_atom_cache_map(ErtsAtomCacheMap *);
void erts_destroy_atom_cache_map(ErtsAtomCacheMap *);
void erts_finalize_atom_cache_map(ErtsAtomCacheMap *);
Uint erts_encode_ext_dist_header_size(ErtsAtomCacheMap *);
Uint erts_encode_ext_dist_header_size(ErtsAtomCacheMap *);
byte *erts_encode_ext_dist_header_setup(byte *, ErtsAtomCacheMap *);
byte *erts_encode_ext_dist_header_finalize(byte *, ErtsAtomCache *);
Uint erts_encode_dist_ext_size(Eterm, Uint32, ErtsAtomCacheMap *);
void erts_encode_dist_ext(Eterm, byte **, Uint32, ErtsAtomCacheMap *);
Uint erts_encode_ext_size(Eterm);
void erts_encode_ext(Eterm, byte **);
#ifdef ERTS_WANT_EXTERNAL_TAGS
ERTS_GLB_INLINE void erts_peek_dist_header(ErtsDistHeaderPeek *, byte *, Uint);
#endif
ERTS_GLB_INLINE void erts_free_dist_ext_copy(ErtsDistExternal *);
ERTS_GLB_INLINE void *erts_dist_ext_trailer(ErtsDistExternal *);
ErtsDistExternal *erts_make_dist_ext_copy(ErtsDistExternal *, Uint);
void *erts_dist_ext_trailer(ErtsDistExternal *);
void erts_destroy_dist_ext_copy(ErtsDistExternal *);
int erts_prepare_dist_ext(ErtsDistExternal *, byte *, Uint,
DistEntry *, ErtsAtomCache *);
Sint erts_decode_dist_ext_size(ErtsDistExternal *, int);
Eterm erts_decode_dist_ext(Eterm **, ErlOffHeap *, ErtsDistExternal *);
Sint erts_decode_ext_size(byte*, Uint, int);
Eterm erts_decode_ext(Eterm **, ErlOffHeap *, byte**);
Eterm erts_term_to_binary(Process* p, Eterm Term, int level, Uint flags);
Sint erts_binary2term_prepare(ErtsBinary2TermState *, byte *, Sint);
void erts_binary2term_abort(ErtsBinary2TermState *);
Eterm erts_binary2term_create(ErtsBinary2TermState *, Eterm **hpp, ErlOffHeap *);
int erts_debug_max_atom_out_cache_index(void);
int erts_debug_atom_to_out_cache_index(Eterm);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
#ifdef ERTS_WANT_EXTERNAL_TAGS
ERTS_GLB_INLINE void
erts_peek_dist_header(ErtsDistHeaderPeek *dhpp, byte *ext, Uint sz)
{
if (ext[0] == VERSION_MAGIC
|| ext[1] != DIST_HEADER
|| sz < (1+1+1))
dhpp->have_header = 0;
else {
dhpp->have_header = 1;
dhpp->cache_entries = (int) get_int8(&ext[2]);
}
}
#endif
ERTS_GLB_INLINE void
erts_free_dist_ext_copy(ErtsDistExternal *edep)
{
if (edep->dep)
erts_deref_dist_entry(edep->dep);
erts_free(ERTS_ALC_T_EXT_TERM_DATA, edep);
}
ERTS_GLB_INLINE void *
erts_dist_ext_trailer(ErtsDistExternal *edep)
{
void *res = (void *) (edep->ext_endp
+ ERTS_WORD_ALIGN_PAD_SZ(edep->ext_endp));
ASSERT((((Uint) res) % sizeof(Uint)) == 0);
return res;
}
#endif
#endif /* ERL_EXTERNAL_H__ */
|
