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
|
/*
* Copyright (c) 2008, 2009, Wayne Meissner
*
* Copyright (c) 2008-2013, Ruby FFI project contributors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Ruby FFI project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RBFFI_ABSTRACTMEMORY_H
#define RBFFI_ABSTRACTMEMORY_H
#ifndef _MSC_VER
#include <sys/param.h>
#endif
#include <sys/types.h>
#ifndef _MSC_VER
#include <stdint.h>
#endif
#include "compat.h"
#include "Types.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MEM_RD 0x01
#define MEM_WR 0x02
#define MEM_CODE 0x04
#define MEM_SWAP 0x08
#define MEM_EMBED 0x10
typedef struct AbstractMemory_ AbstractMemory;
typedef struct {
VALUE (*get)(AbstractMemory* ptr, long offset);
void (*put)(AbstractMemory* ptr, long offset, VALUE value);
} MemoryOp;
typedef struct {
MemoryOp* int8;
MemoryOp* uint8;
MemoryOp* int16;
MemoryOp* uint16;
MemoryOp* int32;
MemoryOp* uint32;
MemoryOp* int64;
MemoryOp* uint64;
MemoryOp* slong;
MemoryOp* uslong;
MemoryOp* float32;
MemoryOp* float64;
MemoryOp* longdouble;
MemoryOp* pointer;
MemoryOp* strptr;
MemoryOp* boolOp;
} MemoryOps;
struct AbstractMemory_ {
char* address; /* Use char* instead of void* to ensure adding to it works correctly */
long size;
int flags;
int typeSize;
};
extern VALUE rbffi_AbstractMemoryClass;
extern MemoryOps rbffi_AbstractMemoryOps;
extern void rbffi_AbstractMemory_Init(VALUE ffiModule);
extern AbstractMemory* rbffi_AbstractMemory_Cast(VALUE obj, VALUE klass);
extern void rbffi_AbstractMemory_Error(AbstractMemory *, int op);
static inline void
checkBounds(AbstractMemory* mem, long off, long len)
{
if (unlikely((off | len | (off + len) | (mem->size - (off + len))) < 0)) {
rb_raise(rb_eIndexError, "Memory access offset=%ld size=%ld is out of bounds",
off, len);
}
}
static inline void
checkRead(AbstractMemory* mem)
{
if (unlikely((mem->flags & MEM_RD) == 0)) {
rbffi_AbstractMemory_Error(mem, MEM_RD);
}
}
static inline void
checkWrite(AbstractMemory* mem)
{
if (unlikely((mem->flags & MEM_WR) == 0)) {
rbffi_AbstractMemory_Error(mem, MEM_WR);
}
}
static inline MemoryOp*
get_memory_op(Type* type)
{
switch (type->nativeType) {
case NATIVE_INT8:
return rbffi_AbstractMemoryOps.int8;
case NATIVE_UINT8:
return rbffi_AbstractMemoryOps.uint8;
case NATIVE_INT16:
return rbffi_AbstractMemoryOps.int16;
case NATIVE_UINT16:
return rbffi_AbstractMemoryOps.uint16;
case NATIVE_INT32:
return rbffi_AbstractMemoryOps.int32;
case NATIVE_UINT32:
return rbffi_AbstractMemoryOps.uint32;
case NATIVE_INT64:
return rbffi_AbstractMemoryOps.int64;
case NATIVE_UINT64:
return rbffi_AbstractMemoryOps.uint64;
case NATIVE_LONG:
return rbffi_AbstractMemoryOps.slong;
case NATIVE_ULONG:
return rbffi_AbstractMemoryOps.uslong;
case NATIVE_FLOAT32:
return rbffi_AbstractMemoryOps.float32;
case NATIVE_FLOAT64:
return rbffi_AbstractMemoryOps.float64;
case NATIVE_LONGDOUBLE:
return rbffi_AbstractMemoryOps.longdouble;
case NATIVE_POINTER:
return rbffi_AbstractMemoryOps.pointer;
case NATIVE_STRING:
return rbffi_AbstractMemoryOps.strptr;
case NATIVE_BOOL:
return rbffi_AbstractMemoryOps.boolOp;
default:
return NULL;
}
}
#define MEMORY(obj) rbffi_AbstractMemory_Cast((obj), rbffi_AbstractMemoryClass)
#define MEMORY_PTR(obj) MEMORY((obj))->address
#define MEMORY_LEN(obj) MEMORY((obj))->size
#ifdef __cplusplus
}
#endif
#endif /* RBFFI_ABSTRACTMEMORY_H */
|
