Destroy memory allocator before device

vma-rs/src/allocator.rs

@@ -115,6 +115,7 @@ impl AllocatorBuilder {
         if result == VK_SUCCESS {
             Ok(Allocator {
                 allocator: unsafe { allocator.assume_init() },
+                destroyed: false,
             })
         } else {
             Err(anyhow::Error::msg(format!(
@@ -143,14 +144,20 @@ impl Default for AllocatorBuilder {
 #[derive(Debug, Clone)]
 pub struct Allocator {
     allocator: VmaAllocator,
+
+    destroyed: bool,
 }
 
 impl Allocator {
     pub fn allocate(&self) -> AllocationBuilder {
+        debug_assert!(!self.destroyed);
+
         AllocationBuilder::new(self.allocator)
     }
 
     pub fn statistics(&self) -> VmaStats {
+        debug_assert!(!self.destroyed);
+
         let mut stats = MaybeUninit::uninit();
 
         unsafe {
@@ -159,6 +166,16 @@ impl Allocator {
             stats.assume_init()
         }
     }
+
+    pub fn destroy(&mut self) {
+        if !self.destroyed {
+            unsafe {
+                vmaDestroyAllocator(self.allocator);
+            }
+
+            self.destroyed = true;
+        }
+    }
 }
 
 unsafe impl Send for Allocator {}
@@ -172,8 +189,6 @@ impl Allocator {
 
 impl Drop for Allocator {
     fn drop(&mut self) {
-        unsafe {
-            vmaDestroyAllocator(self.allocator);
-        }
+        self.destroy()
     }
 }

vulkan-rs/src/device.rs

@@ -459,6 +459,7 @@ impl Drop for Device {
                 .clear(self);
         }
 
+        self.memory_allocator.destroy();
         self.destroy_device();
     }
 }