Remove unnecessary casting from usize to u64

With the bindgen change to use `size_t_is_usize`, the high-level API no longer has to cast `usize` to `u64` before calling into the openvino-sys crate.

Author: abrown

crates/openvino/src/core.rs

@@ -56,13 +56,12 @@ impl Core {
         weights_content: &[u8],
     ) -> Result<CNNNetwork> {
         let mut instance = std::ptr::null_mut();
-        let weights_desc =
-            TensorDesc::new(Layout::ANY, &[weights_content.len() as u64], Precision::U8);
+        let weights_desc = TensorDesc::new(Layout::ANY, &[weights_content.len()], Precision::U8);
         let weights_blob = Blob::new(weights_desc, weights_content)?;
         try_unsafe!(ie_core_read_network_from_memory(
             self.instance,
             model_content as *const _ as *const u8,
-            model_content.len() as u64,
+            model_content.len(),
             weights_blob.instance,
             &mut instance as *mut *mut _,
         ))?;

crates/openvino/src/network.rs

@@ -24,7 +24,7 @@ impl CNNNetwork {
         let mut cname = std::ptr::null_mut();
         try_unsafe!(ie_network_get_input_name(
             self.instance,
-            index as u64,
+            index,
             &mut cname as *mut *mut _
         ))?;
         let name = unsafe { CStr::from_ptr(cname) }
@@ -40,7 +40,7 @@ impl CNNNetwork {
         let mut cname = std::ptr::null_mut();
         try_unsafe!(ie_network_get_output_name(
             self.instance,
-            index as u64,
+            index,
             &mut cname as *mut *mut _
         ))?;
         let name = unsafe { CStr::from_ptr(cname) }

crates/openvino/src/request.rs

@@ -14,7 +14,7 @@ drop_using_function!(InferRequest, ie_infer_request_free);
 impl InferRequest {
     /// Set the batch size of the inference requests.
     pub fn set_batch_size(&mut self, size: usize) -> Result<()> {
-        try_unsafe!(ie_infer_request_set_batch(self.instance, size as u64))
+        try_unsafe!(ie_infer_request_set_batch(self.instance, size))
     }
 
     /// Assign a [Blob] to the input (i.e. `name`) on the network.

crates/openvino/src/tensor_desc.rs

@@ -8,7 +8,7 @@ pub struct TensorDesc {
 
 impl TensorDesc {
     /// Construct a new [TensorDesc] from its C API components.
-    pub fn new(layout: Layout, dimensions: &[u64], precision: Precision) -> Self {
+    pub fn new(layout: Layout, dimensions: &[usize], precision: Precision) -> Self {
         // Setup dimensions.
         assert!(dimensions.len() < 8);
         let mut dims = [0; 8];
@@ -19,7 +19,7 @@ impl TensorDesc {
             instance: tensor_desc_t {
                 layout,
                 dims: dimensions_t {
-                    ranks: dimensions.len() as u64,
+                    ranks: dimensions.len(),
                     dims,
                 },
                 precision,