rusticl/mem: make Mem Send/Sync by storing mapping ptrs as usize

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26040>

src/gallium/frontends/rusticl/core/memory.rs

@@ -49,7 +49,7 @@ impl MappingTransfer {
 
 struct Mappings {
     tx: HashMap<&'static Device, MappingTransfer>,
-    maps: HashMap<*mut c_void, u32>,
+    maps: HashMap<usize, u32>,
 }
 
 impl Mappings {
@@ -60,6 +60,11 @@ impl Mappings {
         })
     }
 
+    fn contains_ptr(&self, ptr: *mut c_void) -> bool {
+        let ptr = ptr as usize;
+        self.maps.contains_key(&ptr)
+    }
+
     fn mark_pending(&mut self, dev: &Device) {
         self.tx.get_mut(dev).unwrap().pending += 1;
     }
@@ -71,6 +76,7 @@ impl Mappings {
     }
 
     fn increase_ref(&mut self, dev: &Device, ptr: *mut c_void) -> bool {
+        let ptr = ptr as usize;
         let res = self.maps.is_empty();
         *self.maps.entry(ptr).or_default() += 1;
         self.unmark_pending(dev);
@@ -78,6 +84,7 @@ impl Mappings {
     }
 
     fn decrease_ref(&mut self, ptr: *mut c_void, dev: &Device) -> (bool, Option<&PipeResource>) {
+        let ptr = ptr as usize;
         if let Some(r) = self.maps.get_mut(&ptr) {
             *r -= 1;
 
@@ -1282,13 +1289,13 @@ impl Mem {
     }
 
     pub fn is_mapped_ptr(&self, ptr: *mut c_void) -> bool {
-        self.maps.lock().unwrap().maps.contains_key(&ptr)
+        self.maps.lock().unwrap().contains_ptr(ptr)
     }
 
     // TODO: only sync on unmap when the memory is not mapped for writing
     pub fn unmap(&self, q: &Arc<Queue>, ctx: &PipeContext, ptr: *mut c_void) -> CLResult<()> {
         let mut lock = self.maps.lock().unwrap();
-        if !lock.maps.contains_key(&ptr) {
+        if !lock.contains_ptr(ptr) {
             return Ok(());
         }