spec/subtend/ext/subtend_define_alloc_func.c

   1 #include <ruby.h>
   2 #include <string.h>
   3
   4 struct sample_wrapped_struct {
   5     int foo;
   6 };
   7
   8 VALUE sdaf_alloc_func(VALUE klass) {
   9     struct sample_wrapped_struct* bar = (struct sample_wrapped_struct *)malloc(sizeof(struct sample_wrapped_struct));
  10     bar->foo = 42;
  11     return Data_Wrap_Struct(klass, NULL, NULL, bar);
  12 }
  13
  14 VALUE sdaf_get_struct(VALUE self) {
  15     struct sample_wrapped_struct* bar;
  16     Data_Get_Struct(self, struct sample_wrapped_struct, bar);
  17
  18     return INT2FIX((*bar).foo);
  19 }
  20
  21 void Init_subtend_define_alloc_func() {
  22   VALUE cls;
  23   cls = rb_define_class("SubtendAlloc", rb_cObject);
  24   rb_define_alloc_func(cls, sdaf_alloc_func);
  25   rb_define_method(cls, "wrapped_data", sdaf_get_struct, 0);
  26 }