COMPMID-2098: Scope handling of memory group resources.

Change-Id: Ie945526bd7845301458039edf3129253c1808505
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/938
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/CL/functions/CLHarrisCorners.cpp b/src/runtime/CL/functions/CLHarrisCorners.cpp
index 65ce7de..342d1ca 100644
--- a/src/runtime/CL/functions/CLHarrisCorners.cpp
+++ b/src/runtime/CL/functions/CLHarrisCorners.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -159,7 +159,7 @@
 {
     ARM_COMPUTE_ERROR_ON_MSG(_sobel == nullptr, "Unconfigured function");
 
-    _memory_group.acquire();
+    MemoryGroupResourceScope scope_mg(_memory_group);
 
     // Init to 0 number of corner candidates
     _num_corner_candidates = 0;
@@ -185,6 +185,4 @@
     _corners->map(CLScheduler::get().queue(), true);
     Scheduler::get().schedule(&_sort_euclidean, Window::DimY);
     _corners->unmap(CLScheduler::get().queue());
-
-    _memory_group.release();
 }