Update test to use once_per_block

HeterogeneousCore/AlpakaInterface/test/alpaka/testWorkDivision.dev.cc

@@ -21,16 +21,6 @@ enum class RangeType { Default, ExtentLimited, ExtentLimitedWithShift };
 // The concurrency scope between threads
 enum class LoopScope { Block, Grid };
 
-// Utility for one time initializations
-template <LoopScope loopScope, typename TAcc>
-bool constexpr firstInLoopRange(TAcc const& acc) {
-  if constexpr (loopScope == LoopScope::Block)
-    return not alpaka::getIdx<alpaka::Block, alpaka::Threads>(acc)[0u];
-  if constexpr (loopScope == LoopScope::Grid)
-    return not alpaka::getIdx<alpaka::Grid, alpaka::Threads>(acc)[0u];
-  assert(false);
-}
-
 template <RangeType rangeType, LoopScope loopScope, typename TAcc>
 size_t constexpr expectedCount(TAcc const& acc, size_t skip, size_t size) {
   if constexpr (rangeType == RangeType::ExtentLimitedWithShift)
@@ -65,8 +55,9 @@ struct testWordDivisionDefaultRange {
         (loopScope == LoopScope::Grid ? *globalCounter : alpaka::declareSharedVar<size_t, __COUNTER__>(acc));
     // Init the counter for block range. Grid range does so my mean of memset.
     if constexpr (loopScope == LoopScope::Block) {
-      if (firstInLoopRange<loopScope>(acc))
+      if (cms::alpakatools::once_per_block(acc)) {
         counter = 0;
+      }
       alpaka::syncBlockThreads(acc);
     }
     // The loop we are testing
@@ -82,7 +73,7 @@ struct testWordDivisionDefaultRange {
     alpaka::syncBlockThreads(acc);
     // Check the result. Grid range will check by memcpy-ing the result.
     if constexpr (loopScope == LoopScope::Block) {
-      if (firstInLoopRange<loopScope>(acc)) {
+      if (cms::alpakatools::once_per_block(acc)) {
         auto expected = expectedCount<rangeType, loopScope>(acc, skip, size);
         ALPAKA_ASSERT_ACC(counter == expected);
       }