From: Jeff Mitchell <quixoticsycophant@...>
Date: 2004-05-19T12:16:10+09:00
Subject: runaway memory in extension

Can someone tell me why memory grows without bound:

arda:~/ex> cat extconf.rb 
require 'mkmf'
create_makefile('myclass')
arda:~/ex> cat myclass.c

#include "ruby.h"

struct MyStruct
{
    int n ;
} ;

void myclass_free(struct MyStruct* data)
{
}

VALUE rb_myclass_initialize( VALUE self )
{
    struct MyStruct *data;
    Data_Get_Struct(self, struct MyStruct, data);
    return Qnil ;
}

static VALUE rb_myclass_s_allocate(VALUE klass)
{
    struct MyStruct* data ;
    VALUE obj = Data_Make_Struct(klass,
                                 struct MyStruct,
                                 0,
                                 myclass_free,
                                 data) ;
    return obj ;
}

VALUE cMyClass ;

void Init_myclass()
{
    cMyClass = rb_define_class("MyClass", rb_cObject) ;
    rb_define_alloc_func(cMyClass, rb_myclass_s_allocate) ;
    rb_define_method(cMyClass, "initialize", rb_myclass_initialize, 0) ;
}
    
arda:~/ex> cat test.rb
require './myclass'
loop { MyClass.new }
arda:~/ex> ruby test.rb



	
		
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