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/*
* Copyright (c) 2010, 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.
*/
#include <ruby.h>
#include <ffi.h>
#include "rbffi.h"
#include "compat.h"
#include "Type.h"
#include "MappedType.h"
static VALUE mapped_allocate(VALUE);
static VALUE mapped_initialize(VALUE, VALUE);
static void mapped_mark(void *);
static void mapped_compact(void *);
static size_t mapped_memsize(const void *);
static ID id_native_type, id_to_native, id_from_native;
VALUE rbffi_MappedTypeClass = Qnil;
static const rb_data_type_t mapped_type_data_type = {
.wrap_struct_name = "FFI::Type::Mapped",
.function = {
.dmark = mapped_mark,
.dfree = RUBY_TYPED_DEFAULT_FREE,
.dsize = mapped_memsize,
ffi_compact_callback( mapped_compact )
},
.parent = &rbffi_type_data_type,
// IMPORTANT: WB_PROTECTED objects must only use the RB_OBJ_WRITE()
// macro to update VALUE references, as to trigger write barriers.
.flags = RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | FFI_RUBY_TYPED_FROZEN_SHAREABLE
};
static VALUE
mapped_allocate(VALUE klass)
{
MappedType* m;
VALUE obj = TypedData_Make_Struct(klass, MappedType, &mapped_type_data_type, m);
RB_OBJ_WRITE(obj, &m->rbConverter, Qnil);
RB_OBJ_WRITE(obj, &m->rbType, Qnil);
m->type = NULL;
m->base.nativeType = NATIVE_MAPPED;
m->base.ffiType = &ffi_type_void;
return obj;
}
/*
* call-seq: initialize(converter)
* @param [#native_type, #to_native, #from_native] converter +converter+ must respond to
* all these methods
* @return [self]
*/
static VALUE
mapped_initialize(VALUE self, VALUE rbConverter)
{
MappedType* m = NULL;
if (!rb_respond_to(rbConverter, id_native_type)) {
rb_raise(rb_eNoMethodError, "native_type method not implemented");
}
if (!rb_respond_to(rbConverter, id_to_native)) {
rb_raise(rb_eNoMethodError, "to_native method not implemented");
}
if (!rb_respond_to(rbConverter, id_from_native)) {
rb_raise(rb_eNoMethodError, "from_native method not implemented");
}
TypedData_Get_Struct(self, MappedType, &mapped_type_data_type, m);
RB_OBJ_WRITE(self, &m->rbType, rb_funcall2(rbConverter, id_native_type, 0, NULL));
if (!(rb_obj_is_kind_of(m->rbType, rbffi_TypeClass))) {
rb_raise(rb_eTypeError, "native_type did not return instance of FFI::Type");
}
RB_OBJ_WRITE(self, &m->rbConverter, rbConverter);
TypedData_Get_Struct(m->rbType, Type, &rbffi_type_data_type, m->type);
m->base.ffiType = m->type->ffiType;
return self;
}
static void
mapped_mark(void* data)
{
MappedType* m = (MappedType*)data;
rb_gc_mark_movable(m->rbType);
rb_gc_mark_movable(m->rbConverter);
}
static void
mapped_compact(void* data)
{
MappedType* m = (MappedType*)data;
ffi_gc_location(m->rbType);
ffi_gc_location(m->rbConverter);
}
static size_t
mapped_memsize(const void *data)
{
return sizeof(MappedType);
}
/*
* call-seq: mapped_type.native_type
* @return [Type]
* Get native type of mapped type.
*/
static VALUE
mapped_native_type(VALUE self)
{
MappedType*m = NULL;
TypedData_Get_Struct(self, MappedType, &mapped_type_data_type, m);
return m->rbType;
}
/*
* call-seq: mapped_type.to_native(*args)
* @param args depends on {FFI::DataConverter} used to initialize +self+
*/
static VALUE
mapped_to_native(int argc, VALUE* argv, VALUE self)
{
MappedType*m = NULL;
TypedData_Get_Struct(self, MappedType, &mapped_type_data_type, m);
return rb_funcall2(m->rbConverter, id_to_native, argc, argv);
}
/*
* call-seq: mapped_type.from_native(*args)
* @param args depends on {FFI::DataConverter} used to initialize +self+
*/
static VALUE
mapped_from_native(int argc, VALUE* argv, VALUE self)
{
MappedType*m = NULL;
TypedData_Get_Struct(self, MappedType, &mapped_type_data_type, m);
return rb_funcall2(m->rbConverter, id_from_native, argc, argv);
}
static VALUE
mapped_converter(VALUE self)
{
MappedType*m = NULL;
TypedData_Get_Struct(self, MappedType, &mapped_type_data_type, m);
return m->rbConverter;
}
void
rbffi_MappedType_Init(VALUE moduleFFI)
{
/*
* Document-class: FFI::Type::Mapped < FFI::Type
*/
rbffi_MappedTypeClass = rb_define_class_under(rbffi_TypeClass, "Mapped", rbffi_TypeClass);
rb_global_variable(&rbffi_MappedTypeClass);
id_native_type = rb_intern("native_type");
id_to_native = rb_intern("to_native");
id_from_native = rb_intern("from_native");
rb_define_alloc_func(rbffi_MappedTypeClass, mapped_allocate);
rb_define_method(rbffi_MappedTypeClass, "initialize", mapped_initialize, 1);
rb_define_method(rbffi_MappedTypeClass, "type", mapped_native_type, 0);
rb_define_method(rbffi_MappedTypeClass, "native_type", mapped_native_type, 0);
rb_define_method(rbffi_MappedTypeClass, "to_native", mapped_to_native, -1);
rb_define_method(rbffi_MappedTypeClass, "from_native", mapped_from_native, -1);
rb_define_method(rbffi_MappedTypeClass, "converter", mapped_converter, 0);
}
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