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=begin
This script shows how to deal with C++ classes using Ruby/DL.
You must build a dynamic loadable library using "c++sample.C"
to run this script as follows:
$ g++ -o libsample.so -shared c++sample.C
=end
require 'dl'
require 'dl/import'
require 'dl/struct'
# Give a name of dynamic loadable library
LIBNAME = ARGV[0] || "libsample.so"
class Person
module Core
extend DL::Importable
dlload LIBNAME
# mangled symbol names
extern "void __6PersonPCci(void *, const char *, int)"
extern "const char *get_name__6Person(void *)"
extern "int get_age__6Person(void *)"
extern "void set_age__6Personi(void *, int)"
Data = struct [
"char *name",
"int age",
]
end
def initialize(name, age)
@ptr = Core::Data.alloc
Core::__6PersonPCci(@ptr, name, age)
end
def get_name()
str = Core::get_name__6Person(@ptr)
if( str )
str.to_s
else
nil
end
end
def get_age()
Core::get_age__6Person(@ptr)
end
def set_age(age)
Core::set_age__6Personi(@ptr, age)
end
end
obj = Person.new("ttate", 1)
p obj.get_name()
p obj.get_age()
obj.set_age(10)
p obj.get_age()
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