From c577f2c6a3b4ddb6ba87a882723c53a248afbeba Mon Sep 17 00:00:00 2001
From: telsoa01 <telmo.soares@arm.com>
Date: Fri, 31 Aug 2018 09:22:23 +0100
Subject: Release 18.08

---
 src/armnn/memory/OffsetLifetimeManager.cpp | 62 ++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 src/armnn/memory/OffsetLifetimeManager.cpp

(limited to 'src/armnn/memory/OffsetLifetimeManager.cpp')

diff --git a/src/armnn/memory/OffsetLifetimeManager.cpp b/src/armnn/memory/OffsetLifetimeManager.cpp
new file mode 100644
index 0000000000..bcbbb0b793
--- /dev/null
+++ b/src/armnn/memory/OffsetLifetimeManager.cpp
@@ -0,0 +1,62 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// See LICENSE file in the project root for full license information.
+//
+#include "OffsetLifetimeManager.hpp"
+#include "OffsetMemoryPool.hpp"
+
+#include "arm_compute/runtime/IMemoryGroup.h"
+
+#include <numeric>
+
+#include "boost/assert.hpp"
+
+namespace armnn
+{
+
+OffsetLifetimeManager::OffsetLifetimeManager()
+    : m_BlobSize(0)
+{
+}
+
+std::unique_ptr<arm_compute::IMemoryPool> OffsetLifetimeManager::create_pool(arm_compute::IAllocator* allocator)
+{
+    BOOST_ASSERT(allocator);
+    return std::make_unique<OffsetMemoryPool>(allocator, m_BlobSize);
+}
+
+arm_compute::MappingType OffsetLifetimeManager::mapping_type() const
+{
+    return arm_compute::MappingType::OFFSETS;
+}
+
+void OffsetLifetimeManager::update_blobs_and_mappings()
+{
+    BOOST_ASSERT(are_all_finalized());
+    BOOST_ASSERT(_active_group);
+
+    // Update blob size
+    size_t maxGroupSize = std::accumulate(std::begin(_free_blobs), std::end(_free_blobs),
+        static_cast<size_t>(0), [](size_t s, const Blob& b)
+    {
+        return s + b.max_size;
+    });
+    m_BlobSize = std::max(m_BlobSize, maxGroupSize);
+
+    // Calculate group mappings
+    auto& groupMappings = _active_group->mappings();
+    size_t offset = 0;
+    for(auto& freeBlob : _free_blobs)
+    {
+        for(auto& boundElementId : freeBlob.bound_elements)
+        {
+            BOOST_ASSERT(_active_elements.find(boundElementId) != std::end(_active_elements));
+            Element& boundElement = _active_elements[boundElementId];
+            groupMappings[boundElement.handle] = offset;
+        }
+        offset += freeBlob.max_size;
+        BOOST_ASSERT(offset <= m_BlobSize);
+    }
+}
+
+} // namespace armnn
\ No newline at end of file
-- 
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