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
|
/*
* Copyright (c) 2009, Wayne Meissner
*
* All rights reserved.
*
* This file is part of ruby-ffi.
*
* This code is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License version 3 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 3 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with this work. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
#include <ruby.h>
#include <ffi.h>
#include "rbffi.h"
#include "compat.h"
#include "Type.h"
#include "StructByValue.h"
#include "Struct.h"
#define FFI_ALIGN(v, a) (((((size_t) (v))-1) | ((a)-1))+1)
static VALUE sbv_allocate(VALUE);
static VALUE sbv_initialize(VALUE, VALUE);
static void sbv_mark(StructByValue *);
static void sbv_free(StructByValue *);
VALUE rbffi_StructByValueClass = Qnil;
static VALUE
sbv_allocate(VALUE klass)
{
StructByValue* sbv;
VALUE obj = Data_Make_Struct(klass, StructByValue, sbv_mark, sbv_free, sbv);
sbv->rbStructClass = Qnil;
sbv->rbStructLayout = Qnil;
sbv->base.nativeType = NATIVE_STRUCT;
sbv->base.ffiType = xcalloc(1, sizeof(*sbv->base.ffiType));
sbv->base.ffiType->size = 0;
sbv->base.ffiType->alignment = 1;
sbv->base.ffiType->type = FFI_TYPE_STRUCT;
return obj;
}
static VALUE
sbv_initialize(VALUE self, VALUE rbStructClass)
{
StructByValue* sbv = NULL;
StructLayout* layout = NULL;
VALUE rbLayout = Qnil;
rbLayout = rb_cvar_get(rbStructClass, rb_intern("@layout"));
if (!rb_obj_is_instance_of(rbLayout, rbffi_StructLayoutClass)) {
rb_raise(rb_eTypeError, "wrong type in @layout cvar (expected FFI::StructLayout)");
}
Data_Get_Struct(rbLayout, StructLayout, layout);
Data_Get_Struct(self, StructByValue, sbv);
sbv->rbStructClass = rbStructClass;
sbv->rbStructLayout = rbLayout;
// We can just use everything from the ffi_type directly
*sbv->base.ffiType = *layout->base.ffiType;
return self;
}
static void
sbv_mark(StructByValue *sbv)
{
rb_gc_mark(sbv->rbStructClass);
rb_gc_mark(sbv->rbStructLayout);
}
static void
sbv_free(StructByValue *sbv)
{
xfree(sbv->base.ffiType);
xfree(sbv);
}
static VALUE
sbv_layout(VALUE self)
{
StructByValue* sbv;
Data_Get_Struct(self, StructByValue, sbv);
return sbv->rbStructLayout;
}
static VALUE
sbv_struct_class(VALUE self)
{
StructByValue* sbv;
Data_Get_Struct(self, StructByValue, sbv);
return sbv->rbStructClass;
}
void
rbffi_StructByValue_Init(VALUE moduleFFI)
{
rbffi_StructByValueClass = rb_define_class_under(moduleFFI, "StructByValue", rbffi_TypeClass);
rb_global_variable(&rbffi_StructByValueClass);
rb_define_const(rbffi_TypeClass, "Struct", rbffi_StructByValueClass);
rb_define_alloc_func(rbffi_StructByValueClass, sbv_allocate);
rb_define_method(rbffi_StructByValueClass, "initialize", sbv_initialize, 1);
rb_define_method(rbffi_StructByValueClass, "layout", sbv_layout, 0);
rb_define_method(rbffi_StructByValueClass, "struct_class", sbv_struct_class, 0);
}
|
