cudnn 1.3.1

safe Rust wrapper for CUDA's cuDNN
Documentation 
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//! Defines a Convolution Descriptor.
//!
//! A Convolution Descriptor is used to hold information about the convolution,
//! which is needed for forward and backward convolutional operations.

use super::{API, Error};
use super::utils::DataType;
use ffi::*;

#[derive(Debug, Clone)]
/// Describes a Convolution Descriptor.
pub struct ConvolutionDescriptor {
    id: cudnnConvolutionDescriptor_t,
}

impl Drop for ConvolutionDescriptor {
    #[allow(unused_must_use)]
    fn drop(&mut self) {
        API::destroy_convolution_descriptor(*self.id_c());
    }
}

impl ConvolutionDescriptor {
    /// Initializes a new CUDA cuDNN ConvolutionDescriptor.
    pub fn new(pad: &[i32], filter_stride: &[i32], data_type: DataType) -> Result<ConvolutionDescriptor, Error> {
        let array_length = pad.len() as i32;
        let upscale: Vec<i32> = ::std::iter::repeat(1i32).take(array_length as usize).collect();

        let generic_convolution_desc = try!(API::create_convolution_descriptor());
        match data_type {
            DataType::Float => {
                let d_type = cudnnDataType_t::CUDNN_DATA_FLOAT;
                try!(API::set_convolution_descriptor(generic_convolution_desc, d_type, cudnnConvolutionMode_t::CUDNN_CONVOLUTION, array_length, pad.as_ptr(), filter_stride.as_ptr(), upscale.as_ptr()));
                Ok(ConvolutionDescriptor::from_c(generic_convolution_desc))
            },
            DataType::Double => {
                let d_type = cudnnDataType_t::CUDNN_DATA_DOUBLE;
                try!(API::set_convolution_descriptor(generic_convolution_desc, d_type, cudnnConvolutionMode_t::CUDNN_CONVOLUTION, array_length, pad.as_ptr(), filter_stride.as_ptr(), upscale.as_ptr()));
                Ok(ConvolutionDescriptor::from_c(generic_convolution_desc))
            },
            DataType::Half => {
                let d_type = cudnnDataType_t::CUDNN_DATA_FLOAT;
                try!(API::set_convolution_descriptor(generic_convolution_desc, d_type, cudnnConvolutionMode_t::CUDNN_CONVOLUTION, array_length, pad.as_ptr(), filter_stride.as_ptr(), upscale.as_ptr()));
                Ok(ConvolutionDescriptor::from_c(generic_convolution_desc))
            }
        }
    }

    /// Initializes a new CUDA cuDNN ConvolutionDescriptor from its C type.
    pub fn from_c(id: cudnnConvolutionDescriptor_t) -> ConvolutionDescriptor {
        ConvolutionDescriptor { id: id }
    }

    /// Returns the CUDA cuDNN ConvolutionDescriptor as its C type.
    pub fn id_c(&self) -> &cudnnConvolutionDescriptor_t {
        &self.id
    }
}