Class: FFI::Pointer

Inherits:
Object
  • Object
show all
Defined in:
lib/flann/index.rb

Overview

Copyright 2014 John O. Woods ([email protected]), West Virginia

University's Applied Space Exploration Lab, and West Virginia Robotic
Technology Center. All rights reserved.

THE BSD LICENSE

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Class Method Summary collapse

Class Method Details

.new_from_nmatrix(nm) ⇒ Object

Raises:

  • (StorageError) 


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# File 'lib/flann/index.rb', line 30

def new_from_nmatrix nm
  raise(StorageError, "dense storage expected") unless nm.dense?
  c_type = Flann::dtype_to_c(nm.dtype)
  c_type = :uchar if c_type == :byte
  ::FFI::Pointer.new(c_type, nm.data_pointer).tap { |p| p.autorelease = false }
end