Moved std::once_flag to a private member

Author: keyradical

source/adapters/cuda/queue.hpp

@@ -32,6 +32,7 @@ struct ur_queue_handle_t_ {
   // Stream used solely when profiling is enabled
   native_type ProfStream;
   bool IsProfStreamCreated{false};
+  std::once_flag ProfStreamFlag;
   // delay_compute_ keeps track of which streams have been recently reused and
   // their next use should be delayed. If a stream has been recently reused it
   // will be skipped the next time it would be selected round-robin style. When
@@ -107,7 +108,6 @@ struct ur_queue_handle_t_ {
   // Function which creates the profiling stream. Called only if profiling is
   // enabled.
   void createProfilingStream() {
-    static std::once_flag ProfStreamFlag;
     std::call_once(ProfStreamFlag, [&]() {
       UR_CHECK_ERROR(
           cuStreamCreateWithPriority(&ProfStream, CU_STREAM_NON_BLOCKING, 0));

source/adapters/hip/queue.hpp

@@ -28,6 +28,7 @@ struct ur_queue_handle_t_ {
   // Stream used solely when profiling is enabled
   native_type ProfStream;
   bool IsProfStreamCreated{false};
+  std::once_flag ProfStreamFlag;
   // DelayCompute keeps track of which streams have been recently reused and
   // their next use should be delayed. If a stream has been recently reused it
   // will be skipped the next time it would be selected round-robin style. When
@@ -104,7 +105,6 @@ struct ur_queue_handle_t_ {
   // Function which creates the profiling stream. Called only if profiling is
   // enabled.
   void createProfilingStream() {
-    static std::once_flag ProfStreamFlag;
     std::call_once(ProfStreamFlag, [&]() {
       UR_CHECK_ERROR(
           hipStreamCreateWithFlags(&ProfStream, hipStreamNonBlocking));