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use crate::error::check;
use crate::Dtype;
use crate::Error;
use std::ffi::CString;
use std::mem;
use std::ptr;
use std::slice;
/// Model, which executes computation.
pub struct Model {
pub(crate) handle: menoh_sys::menoh_model_handle,
}
impl Model {
/// Fetch the shape of a variable.
///
/// ```
/// # use menoh::*;
/// # fn main() -> Result<(), Error> {
/// # let model = Builder::from_onnx("MLP.onnx")?
/// # .add_input::<f32>("input", &[2, 3])?
/// # .add_output("fc2")?
/// # .build("mkldnn", "")?;
/// let dims = model.get_variable_dims("fc2")?;
/// # assert_eq!(dims, &[2, 5]);
/// # Ok(())
/// # }
/// ```
pub fn get_variable_dims(&self, name: &str) -> Result<Vec<usize>, Error> {
let name = CString::new(name)?;
unsafe {
let mut size = 0;
check(menoh_sys::menoh_model_get_variable_dims_size(
self.handle,
name.as_ptr(),
&mut size,
))?;
let mut dims = Vec::with_capacity(size as _);
for index in 0..size {
let mut dim = 0;
check(menoh_sys::menoh_model_get_variable_dims_at(
self.handle,
name.as_ptr(),
index,
&mut dim,
))?;
dims.push(dim as _);
}
Ok(dims)
}
}
fn get_variable_dtype(&self, name: &str) -> Result<menoh_sys::menoh_dtype, Error> {
let name = CString::new(name)?;
unsafe {
let mut dtype = mem::uninitialized();
check(menoh_sys::menoh_model_get_variable_dtype(
self.handle,
name.as_ptr(),
&mut dtype,
))?;
Ok(dtype)
}
}
/// Fetch the shape and read-only view of a variable.
///
/// ```
/// # use menoh::*;
/// # fn main() -> Result<(), Error> {
/// # let model = Builder::from_onnx("MLP.onnx")?
/// # .add_input::<f32>("input", &[2, 3])?
/// # .add_output("fc2")?
/// # .build("mkldnn", "")?;
/// let (dims, buf) = model.get_variable::<f32>("fc2")?;
/// # assert_eq!(dims, &[2, 5]);
/// # Ok(())
/// # }
/// ```
pub fn get_variable<T>(&self, name: &str) -> Result<(Vec<usize>, &[T]), Error>
where
T: Dtype,
{
T::check(self.get_variable_dtype(name)?)?;
let dims = self.get_variable_dims(name)?;
let name = CString::new(name)?;
let mut buffer = ptr::null_mut();
unsafe {
check(menoh_sys::menoh_model_get_variable_buffer_handle(
self.handle,
name.as_ptr(),
&mut buffer,
))?;
let buffer = slice::from_raw_parts(buffer as _, dims.iter().product());
Ok((dims, buffer))
}
}
/// Fetch the shape and read/write view of a variable.
///
/// ```
/// # use menoh::*;
/// # fn main() -> Result<(), Error> {
/// # let mut model = Builder::from_onnx("MLP.onnx")?
/// # .add_input::<f32>("input", &[2, 3])?
/// # .add_output("fc2")?
/// # .build("mkldnn", "")?;
/// let (dims, buf) = model.get_variable_mut::<f32>("fc2")?;
/// # assert_eq!(dims, &[2, 5]);
/// # Ok(())
/// # }
/// ```
pub fn get_variable_mut<T>(&mut self, name: &str) -> Result<(Vec<usize>, &mut [T]), Error>
where
T: Dtype,
{
T::check(self.get_variable_dtype(name)?)?;
let dims = self.get_variable_dims(name)?;
let name = CString::new(name)?;
let mut buffer = ptr::null_mut();
unsafe {
check(menoh_sys::menoh_model_get_variable_buffer_handle(
self.handle,
name.as_ptr(),
&mut buffer,
))?;
let buffer = slice::from_raw_parts_mut(buffer as _, dims.iter().product());
Ok((dims, buffer))
}
}
pub fn run(&mut self) -> Result<(), Error> {
unsafe { check(menoh_sys::menoh_model_run(self.handle)) }
}
}
impl Drop for Model {
fn drop(&mut self) {
unsafe { menoh_sys::menoh_delete_model(self.handle) }
}
}