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Class: Fiddle::Pinned

Relationships & Source Files
Inherits: Object
Defined in: ext/fiddle/pinned.c,
ext/fiddle/lib/fiddle/ffi_backend.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(object) ⇒ Pinned

Create a new pinned object reference. The Pinned instance will prevent the GC from moving object.

[ GitHub ] 

  


# File 'ext/fiddle/pinned.c', line 52



static VALUE
initialize(VALUE self, VALUE ref)
{
    struct pinned_data *data;
    TypedData_Get_Struct(self, struct pinned_data, &pinned_data_type, data);
    RB_OBJ_WRITE(self, &data->ptr, ref);
    return self;
}


  






  

  

    #initialize(object)  ⇒ Pinned 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'ext/fiddle/lib/fiddle/ffi_backend.rb', line 546



def initialize(object)
  @object = object
end


  







Instance Attribute Details



  

    #cleared?  ⇒ Boolean  (readonly)  



  

    

Returns true if the reference has been cleared, otherwise returns false.


  



  [ GitHub ]


  

  


# File 'ext/fiddle/pinned.c', line 97



static VALUE
cleared_p(VALUE self)
{
    struct pinned_data *data;
    TypedData_Get_Struct(self, struct pinned_data, &pinned_data_type, data);
    if (data->ptr) {
        return Qfalse;
    } else {
        return Qtrue;
    }
}


  







Instance Method Details



  

    #clear    



  

    

Clear the reference to the object this is pinning.


  



  [ GitHub ]


  

  


# File 'ext/fiddle/pinned.c', line 83



static VALUE
clear(VALUE self)
{
    struct pinned_data *data;
    TypedData_Get_Struct(self, struct pinned_data, &pinned_data_type, data);
    data->ptr = 0;
    return self;
}


  








  

    #ref    



  

    

Return the object that this pinned instance references.


  



  [ GitHub ]


  

  


# File 'ext/fiddle/pinned.c', line 66



static VALUE
ref(VALUE self)
{
    struct pinned_data *data;
    TypedData_Get_Struct(self, struct pinned_data, &pinned_data_type, data);
    if (data->ptr) {
      return data->ptr;
    } else {
      rb_raise(rb_eFiddleClearedReferenceError, "`ref` called on a cleared object");
    }
}