Use memory constants instead of hard coded values.

Change-Id: I4be62ec34cb7b7bcdeebb4ff82abe0c17f59af85

Author: MichalMrozek

runtime/memory_manager/os_agnostic_memory_manager.cpp

@@ -255,7 +255,7 @@ Allocator32bit *OsAgnosticMemoryManager::create32BitAllocator(bool aubUsage) {
     }
 
     if (DebugManager.flags.UseMallocToObtainHeap32Base.get()) {
-        size_t allocationSize = 40 * 1024 * 1024u;
+        size_t allocationSize = 40 * MemoryConstants::megaByte;
         allocatorSize = static_cast<uint64_t>(allocationSize);
         heap32Base = castToUint64(alignedMallocWrapper(allocationSize, MemoryConstants::allocationAlignment));
     }

runtime/utilities/heap_allocator.h

@@ -1,23 +1,8 @@
 /*
- * Copyright (c) 2017, Intel Corporation
+ * Copyright (C) 2017-2018 Intel Corporation
  *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
+ * SPDX-License-Identifier: MIT
  *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
  */
 
 #pragma once
@@ -155,7 +140,7 @@ class HeapAllocator {
     uint64_t size;
     uint64_t availableSize;
     uint64_t pLeftBound, pRightBound;
-    const size_t defaultSizeThreshold = 4096 * 1024;
+    const size_t defaultSizeThreshold = 4 * MemoryConstants::megaByte;
     const size_t sizeThreshold;
     size_t allocationAlignment = MemoryConstants::pageSize;