IVGCVSW-3903 Create Counter Stream Buffer

 * Add implementation of PacketBuffer
 * Add implementation of BufferManager
 * Unit tests

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: Icca3807149ff5a8ed31cc87de73c50b95bca39d4

1 files changed, 60 insertions, 0 deletions

diff --git a/src/profiling/PacketBuffer.cpp b/src/profiling/PacketBuffer.cpp
new file mode 100644
index 0000000000..88133d7674
--- /dev/null
+++ b/src/profiling/PacketBuffer.cpp
@@ -0,0 +1,60 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "PacketBuffer.hpp"
+
+#include <armnn/Exceptions.hpp>
+
+namespace armnn
+{
+
+namespace profiling
+{
+
+PacketBuffer::PacketBuffer(unsigned int maxSize)
+    : m_MaxSize(maxSize)
+    , m_Size(0)
+{
+    m_Data = std::make_unique<unsigned char[]>(m_MaxSize);
+}
+
+const unsigned char* const PacketBuffer::GetReadableData() const
+{
+    return m_Data.get();
+}
+
+unsigned int PacketBuffer::GetSize() const
+{
+    return m_Size;
+}
+
+void PacketBuffer::MarkRead()
+{
+    m_Size = 0;
+}
+
+void PacketBuffer::Commit(unsigned int size)
+{
+    if (size > m_MaxSize)
+    {
+        throw armnn::RuntimeException("Cannot commit [" + std::to_string(size) +
+                "] bytes which is more than the maximum size of the buffer [" + std::to_string(m_MaxSize) + "]");
+    }
+    m_Size = size;
+}
+
+void PacketBuffer::Release()
+{
+    m_Size = 0;
+}
+
+unsigned char* PacketBuffer::GetWritableData()
+{
+    return m_Data.get();
+}
+
+} // namespace profiling
+
+} // namespace armnn