vulkan: add new_timeline_semaphore helper, route create_fence through it

Author: cwfitzgerald

wgpu-hal/src/vulkan/device.rs

@@ -2529,12 +2529,9 @@ impl crate::Device for super::Device {
         self.counters.fences.add(1);
 
         Ok(if self.shared.private_caps.timeline_semaphores {
-            let mut sem_type_info =
-                vk::SemaphoreTypeCreateInfo::default().semaphore_type(vk::SemaphoreType::TIMELINE);
-            let vk_info = vk::SemaphoreCreateInfo::default().push_next(&mut sem_type_info);
-            let raw = unsafe { self.shared.raw.create_semaphore(&vk_info, None) }
-                .map_err(super::map_host_device_oom_err)?;
-
+            let raw = self
+                .shared
+                .new_timeline_semaphore(0, "wgpu-hal device fence")?;
             super::Fence::TimelineSemaphore(raw)
         } else {
             super::Fence::FencePool(RwLock::new(super::FencePool {
@@ -3042,6 +3039,22 @@ impl super::DeviceShared {
         }
     }
 
+    /// Creates a timeline semaphore with the given initial value.
+    pub(super) fn new_timeline_semaphore(
+        &self,
+        initial_value: u64,
+        name: &str,
+    ) -> Result<vk::Semaphore, crate::DeviceError> {
+        let mut type_info = vk::SemaphoreTypeCreateInfo::default()
+            .semaphore_type(vk::SemaphoreType::TIMELINE)
+            .initial_value(initial_value);
+        let info = vk::SemaphoreCreateInfo::default().push_next(&mut type_info);
+        let semaphore = unsafe { self.raw.create_semaphore(&info, None) }
+            .map_err(super::map_host_device_oom_err)?;
+        unsafe { self.set_object_name(semaphore, name) };
+        Ok(semaphore)
+    }
+
     pub(super) fn wait_for_fence(
         &self,
         fence: &super::Fence,