Fix running_compute_processes count handling (#36)

* Fix running_compute_processes count handling

Consistent with running_graphics_processes

CHANGELOG.md

@@ -14,6 +14,13 @@ This file describes the changes / additions / fixes between wrapper releases, tr
   * `Brand`
     * Added new variants ([#35](https://github.com/Cldfire/nvml-wrapper/pull/35) - @nemosupremo)
 
+### Fixed
+
+* `Device`
+  * `running_compute_processes()`
+    * Fixed count handling ([#36](https://github.com/Cldfire/nvml-wrapper/pull/36) - @jjyyxx)
+      * This bug would have caused five blank process information structs to be returned in addition to actual process information if there were any running compute processes.
+
 ### Internal
 
 * SPDX expressions in `Cargo.toml` files have been updated to avoid using the now-deprecated slash syntax ([#32](https://github.com/Cldfire/nvml-wrapper/pull/32) - @KisaragiEffective)

nvml-wrapper/src/device.rs

@@ -565,7 +565,7 @@ impl<'nvml> Device<'nvml> {
         unsafe {
             let mut count: c_uint = match self.running_compute_processes_count()? {
                 0 => return Ok(vec![]),
-                value => value + 5,
+                value => value,
             };
             // Add a bit of headroom in case more processes are launched in
             // between the above call to get the expected count and the time we
@@ -575,6 +575,7 @@ impl<'nvml> Device<'nvml> {
 
             nvml_try(sym(self.device, &mut count, processes.as_mut_ptr()))?;
 
+            processes.truncate(count as usize);
             Ok(processes.into_iter().map(ProcessInfo::from).collect())
         }
     }