Ruby CStructBuilder.create用法及代碼示例

create(klass, types, members)

給定 C 構造一個新類：

• klass 類( CUnion 、 CStruct 或其他提供 entity_class 的類)

• types(Fiddle::TYPE_INT、Fiddle::TYPE_SIZE_T等，見C類型常量)

• 對應members

Fiddle::Importer#struct 和 Fiddle::Importer#union 以 easy-to-use 方式包裝此函數。

例子：

require 'fiddle/struct'
require 'fiddle/cparser'

include Fiddle::CParser

types, members = parse_struct_signature(['int i','char c'])

MyStruct = Fiddle::CStructBuilder.create(Fiddle::CUnion, types, members)

MyStruct.malloc(Fiddle::RUBY_FREE) do |obj|
  ...
end

obj = MyStruct.malloc(Fiddle::RUBY_FREE)
begin
  ...
ensure
  obj.call_free
end

obj = MyStruct.malloc
begin
  ...
ensure
  Fiddle.free obj.to_ptr
end