Change int to size_t

Change return type to 64 bits to avoid truncation.

Author: Hugh Delaney

source/adapters/cuda/context.hpp

@@ -117,7 +117,7 @@ struct ur_context_handle_t_ {
   }
 
   // Gets the index of the device relative to other devices in the context
-  int getDeviceIndex(ur_device_handle_t hDevice) {
+  size_t getDeviceIndex(ur_device_handle_t hDevice) {
     auto It = std::find(Devices.begin(), Devices.end(), hDevice);
     assert(It != Devices.end());
     return std::distance(Devices.begin(), It);

source/adapters/hip/context.hpp

@@ -113,7 +113,7 @@ struct ur_context_handle_t_ {
   }
 
   // Gets the index of the device relative to other devices in the context
-  int getDeviceIndex(ur_device_handle_t hDevice) {
+  size_t getDeviceIndex(ur_device_handle_t hDevice) {
     auto It = std::find(Devices.begin(), Devices.end(), hDevice);
     assert(It != Devices.end());
     return std::distance(Devices.begin(), It);