From acec9fe6eab17ab14dc17b0af8467e3f4dfbe113 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=EB=B0=95=EC=A2=85=ED=98=84/=EB=8F=99=EC=9E=91=EC=A0=9C?=
 =?utf8?q?=EC=96=B4Lab=28SR=29/Senior=20Engineer/=EC=82=BC=EC=84=B1?=
 =?utf8?q?=EC=A0=84=EC=9E=90?= <jh1302.park@samsung.com>
Date: Thu, 24 May 2018 17:10:08 +0900
Subject: [PATCH] [nnkit] Introduce backend interface (#251)

This commit introduces 'nnkit::Backend' and 'nnkit::BackendFactory'
interfaces which abstracts various NN frameworks.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>
---
 contrib/nnkit/libs/intf/CMakeLists.txt             |  1 +
 contrib/nnkit/libs/intf/backend/CMakeLists.txt     |  4 ++++
 .../libs/intf/backend/include/nnkit/Backend.h      | 22 ++++++++++++++++++++++
 .../intf/backend/include/nnkit/BackendFactory.h    | 22 ++++++++++++++++++++++
 4 files changed, 49 insertions(+)
 create mode 100644 contrib/nnkit/libs/intf/backend/CMakeLists.txt
 create mode 100644 contrib/nnkit/libs/intf/backend/include/nnkit/Backend.h
 create mode 100644 contrib/nnkit/libs/intf/backend/include/nnkit/BackendFactory.h

diff --git a/contrib/nnkit/libs/intf/CMakeLists.txt b/contrib/nnkit/libs/intf/CMakeLists.txt
index 46de032..bb56320 100644
--- a/contrib/nnkit/libs/intf/CMakeLists.txt
+++ b/contrib/nnkit/libs/intf/CMakeLists.txt
@@ -1,2 +1,3 @@
 add_subdirectory(tensor)
 add_subdirectory(cmdline)
+add_subdirectory(backend)
diff --git a/contrib/nnkit/libs/intf/backend/CMakeLists.txt b/contrib/nnkit/libs/intf/backend/CMakeLists.txt
new file mode 100644
index 0000000..84161e9
--- /dev/null
+++ b/contrib/nnkit/libs/intf/backend/CMakeLists.txt
@@ -0,0 +1,4 @@
+add_library(nnkit_intf_backend INTERFACE)
+target_include_directories(nnkit_intf_backend INTERFACE include)
+target_link_libraries(nnkit_intf_backend INTERFACE nnkit_intf_tensor)
+target_link_libraries(nnkit_intf_backend INTERFACE nnkit_intf_cmdline)
diff --git a/contrib/nnkit/libs/intf/backend/include/nnkit/Backend.h b/contrib/nnkit/libs/intf/backend/include/nnkit/Backend.h
new file mode 100644
index 0000000..4bcc80e
--- /dev/null
+++ b/contrib/nnkit/libs/intf/backend/include/nnkit/Backend.h
@@ -0,0 +1,22 @@
+#ifndef __NNKIT_BACKEND_H__
+#define __NNKIT_BACKEND_H__
+
+#include <nnkit/TensorContext.h>
+
+#include <functional>
+
+namespace nnkit
+{
+
+struct Backend
+{
+  virtual ~Backend() = default;
+
+  virtual void prepare(const std::function<void (TensorContext &)> &f) = 0;
+  virtual void run(void) = 0;
+  virtual void teardown(const std::function<void (TensorContext &)> &f) = 0;
+};
+
+} // namespace nnkit
+
+#endif // __NNKIT_BACKEND_H__
diff --git a/contrib/nnkit/libs/intf/backend/include/nnkit/BackendFactory.h b/contrib/nnkit/libs/intf/backend/include/nnkit/BackendFactory.h
new file mode 100644
index 0000000..09abbdf
--- /dev/null
+++ b/contrib/nnkit/libs/intf/backend/include/nnkit/BackendFactory.h
@@ -0,0 +1,22 @@
+#ifndef __NNKIT_BACKEND_FACTORY_H__
+#define __NNKIT_BACKEND_FACTORY_H__
+
+#include "Backend.h"
+
+#include <nnkit/CmdlineArguments.h>
+
+#include <memory>
+
+namespace nnkit
+{
+
+struct BackendFactory
+{
+  virtual ~BackendFactory() = default;
+
+  virtual std::unique_ptr<Backend> make(const CmdlineArguments &args) const = 0;
+};
+
+} // namesapce nnkit
+
+#endif // __NNKIT_BACKEND_FACTORY_H__
-- 
2.7.4