Class: NativeMallocBuffer

Inherits:
Object
  • Object
show all
Includes:
NativeBuffer
Defined in:
lib/oinky/nbuffer.rb,
lib/oinky/nbuffer.rb

Overview

This is a specific implementation of NativeBuffer. It uses malloc/free.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from NativeBuffer

#<=>, #clone, #each_byte, #each_char, #inspect, #rb_str

Constructor Details

#initialize(v = 0) ⇒ NativeMallocBuffer

Returns a new instance of NativeMallocBuffer.



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# File 'lib/oinky/nbuffer.rb', line 120

def initialize(v = 0)
  if (v.is_a? Fixnum)
    @ptr = FFI::MemoryPointer.new :pointer
    size = v
    if size > 0 
      @ptr = LibC.malloc(size)
      @length = size
    else
      @ptr = nil
      @length = 0
    end
  elsif v.is_a? String
    size = v.length
    @ptr = LibC.malloc(size)
    LibC.memcpy(@ptr, v, size)
    @length = size
  elsif v.is_a? NativeBuffer
    size = v.length
    @ptr = LibC.malloc(size)
    LibC.memcpy(@ptr, v.ptr, size)
    @length = size
  else
    raise OinkyException.new("Invalid initialize parameter to NativeMallocBuffer.new") 
  end

  ObjectSpace.define_finalizer( self, self.class.finalize(@ptr) )
end

Instance Attribute Details

#length ⇒ Object (readonly)

Returns the value of attribute length.



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# File 'lib/oinky/nbuffer.rb', line 118

def length
  @length
end

#ptr ⇒ Object (readonly)

Returns the value of attribute ptr.



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# File 'lib/oinky/nbuffer.rb', line 118

def ptr
  @ptr
end

Class Method Details

.finalize(ptr) ⇒ Object 



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# File 'lib/oinky/nbuffer.rb', line 148

def self.finalize(ptr)
  proc { LibC.free(ptr) }
end