Added testing for hipStreamSynchronize and hipStreamQuery (#2572)

[ROCm/hip commit: b7f5db36d2]

projects/hip/tests/catch/unit/stream/streamCommon.cc

@@ -66,44 +66,8 @@ bool checkStreamFlags_(hipStream_t stream, bool checkFlags = false, unsigned fla
 
 inline namespace stream {
 
-__device__ int defaultSemaphore = 0;
-
-__global__ void signaling_kernel(int* semaphore) {
-  size_t tid{blockIdx.x * blockDim.x + threadIdx.x};
-  if (tid == 0) {
-    if (semaphore == nullptr) {
-      atomicAdd(&defaultSemaphore, 1);
-    } else {
-      atomicAdd(semaphore, 1);
-    }
-  }
-}
-
-__global__ void waiting_kernel(int* semaphore) {
-  size_t tid{blockIdx.x * blockDim.x + threadIdx.x};
-  if (tid == 0) {
-    if (semaphore == nullptr) {
-      while (atomicCAS(&defaultSemaphore, 1, 2) == 0) {
-      }
-    } else {
-      while (atomicCAS(semaphore, 1, 2) == 0) {
-      }
-    }
-  }
-}
-
-std::thread startSignalingThread(int* semaphore) {
-  std::thread signalingThread([semaphore]() {
-    hipStream_t signalingStream;
-    HIP_CHECK_THREAD(hipStreamCreateWithFlags(&signalingStream, hipStreamNonBlocking));
-
-    signaling_kernel<<<1, 1, 0, signalingStream>>>(semaphore);
-    HIP_CHECK_THREAD(hipStreamSynchronize(signalingStream));
-    HIP_CHECK_THREAD(hipStreamDestroy(signalingStream));
-  });
-
-  return signalingThread;
-}
+/* Empty kernel to ensure work finishes on the stream quickly */
+__global__ void empty_kernel() {}
 
 bool checkStream(hipStream_t stream) {
   {  // Check default flags