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/*
* Copyright (c) 2008, 2009, Wayne Meissner
* Copyright (c) 2009, Luc Heinrich <luc@honk-honk.com>
*
* 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_STRUCT_H
#define RBFFI_STRUCT_H
#include "extconf.h"
#include "AbstractMemory.h"
#include "Type.h"
#include <ruby/st.h>
#ifdef __cplusplus
extern "C" {
#endif
extern void rbffi_Struct_Init(VALUE ffiModule);
extern void rbffi_StructLayout_Init(VALUE ffiModule);
extern const rb_data_type_t rbffi_struct_layout_data_type;
extern const rb_data_type_t rbffi_struct_field_data_type;
typedef struct StructField_ StructField;
typedef struct StructLayout_ StructLayout;
typedef struct Struct_ Struct;
struct StructField_ {
Type* type;
unsigned int offset;
int referenceIndex;
bool referenceRequired;
VALUE rbType;
VALUE rbName;
VALUE (*get)(StructField* field, Struct* s);
void (*put)(StructField* field, Struct* s, VALUE value);
MemoryOp* memoryOp;
};
struct StructLayout_ {
Type base;
StructField** fields;
int fieldCount;
int size;
int align;
ffi_type** ffiTypes;
/*
* We use the fieldName's minor 8 Bits as index to a 256 entry cache.
* This avoids full ruby hash lookups for repeated lookups.
*/
#define FIELD_CACHE_LOOKUP(this, sym) ( &(this)->cache_row[((sym) >> 8) & 0xff] )
#define FIELD_CACHE_ROWS 0x100
struct field_cache_entry {
VALUE fieldName;
StructField *field;
} cache_row[FIELD_CACHE_ROWS];
/** The number of reference tracking fields in this struct */
int referenceFieldCount;
VALUE rbFieldNames;
VALUE rbFieldMap;
VALUE rbFields;
};
struct Struct_ {
StructLayout* layout;
AbstractMemory* pointer;
VALUE* rbReferences;
VALUE rbLayout;
VALUE rbPointer;
};
extern const rb_data_type_t rbffi_struct_data_type;
extern const rb_data_type_t rbffi_struct_field_data_type;
extern VALUE rbffi_StructClass, rbffi_StructLayoutClass;
extern VALUE rbffi_StructLayoutFieldClass, rbffi_StructLayoutFunctionFieldClass;
extern VALUE rbffi_StructLayoutArrayFieldClass;
extern VALUE rbffi_StructInlineArrayClass;
extern VALUE rbffi_StructLayoutCharArrayClass;
#ifdef __cplusplus
}
#endif
#endif /* RBFFI_STRUCT_H */
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