C-API: Setting a Ruby-Object in a wrapped C struct

ruby-talk
1

Hi,

i have a Ruby class which uses a wrapped C struct for housekeeping it’s
members:

struct
{
VALUE bar;
} foo;

and use the following function for the class methode “bar()”:

static VALUE
getBar( VALUE self )
{
foo* p;
Data_Get_Struct( self, foo, p );

return p->bar;
}

Now i don’t know how to write a corresponding “bar=()” function. Can anybody
give me a hint? iv_set_var() seems to be unnecessary inefficient.

Thanks
Lenny

2

Now i don't know how to write a corresponding "bar=()" function. Can anybody
give me a hint? iv_set_var() seems to be unnecessary inefficient.

static VALUE
setBar(VALUE self, VALUE obj)
{
     foo *p;
     Data_Get_Struct(self, foo, p);
     p->bar = obj;
     return obj;
}

/* ... */

rb_define_method(Foo, "bar", getBar, 0);
rb_define_method(Foo, "bar=", setBar, 1);

p.s. : don't forget to have a mark function for your struct and mark p->bar

Guy Decoux

3

Hi,

 Data_Get_Struct(self, foo, p);
 p->bar = obj;

[…]

···

p.s. : don’t forget to have a mark function for your struct and mark p->bar

4

Oops, sorry. This canceled reply made it through. blush

Thanks for the reply the mark-hint was very valuable for me.

Bye
Lenny

···

On Saturday 29 March 2003 21:39, Lenny wrote:

Hi,

 Data_Get_Struct(self, foo, p);
 p->bar = obj;

[…]

p.s. : don’t forget to have a mark function for your struct and mark
p->bar