From 7582966e16ce620c8f5227297588ab55c2fc90b9 Mon Sep 17 00:00:00 2001
From: Daniel Krebs <github@daniel-krebs.net>
Date: Tue, 30 Jan 2018 15:11:29 +0100
Subject: [PATCH] lib: first draft of memory manager

---
 fpga/include/villas/memory_manager.hpp | 47 ++++++++++++++++++++++++++
 fpga/lib/CMakeLists.txt                |  1 +
 fpga/lib/memory_manager.cpp            | 19 +++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 fpga/include/villas/memory_manager.hpp
 create mode 100644 fpga/lib/memory_manager.cpp

diff --git a/fpga/include/villas/memory_manager.hpp b/fpga/include/villas/memory_manager.hpp
new file mode 100644
index 000000000..a992f84a0
--- /dev/null
+++ b/fpga/include/villas/memory_manager.hpp
@@ -0,0 +1,47 @@
+#pragma once
+
+#include <cstdint>
+
+#include "log.hpp"
+#include "directed_graph.hpp"
+
+namespace villas {
+
+
+class Mapping : public graph::Edge {
+public:
+    // create mapping here (if needed)
+    Mapping() {}
+
+    // destroy mapping here (if needed)
+    ~Mapping() {}
+
+private:
+    uintptr_t src;
+    uintptr_t dest;
+    size_t size;
+};
+
+class AddressSpace : public graph::Vertex {
+private:
+    // do we need any metadata? maybe a name?
+    int id;
+};
+
+
+// is or has a graph
+class MemoryManager {
+
+// This is a singleton
+private:
+    MemoryManager() = default;
+    static MemoryManager* instance;
+public:
+    static MemoryManager& get();
+
+
+private:
+//    std::list<>
+};
+
+} // namespace villas
diff --git a/fpga/lib/CMakeLists.txt b/fpga/lib/CMakeLists.txt
index 62cff3113..2302a32eb 100644
--- a/fpga/lib/CMakeLists.txt
+++ b/fpga/lib/CMakeLists.txt
@@ -25,6 +25,7 @@ set(SOURCES
 	kernel/pci.c
 	kernel/vfio.c
 
+	memory_manager.cpp
 	plugin.c
 	plugin.cpp
 	utils.c
diff --git a/fpga/lib/memory_manager.cpp b/fpga/lib/memory_manager.cpp
new file mode 100644
index 000000000..d00460219
--- /dev/null
+++ b/fpga/lib/memory_manager.cpp
@@ -0,0 +1,19 @@
+#include "memory_manager.hpp"
+
+namespace villas {
+
+MemoryManager*
+MemoryManager::instance = nullptr;
+
+MemoryManager&
+MemoryManager::get()
+{
+	if(instance == nullptr) {
+		instance = new MemoryManager;
+	}
+
+	return *instance;
+}
+
+
+} // namespace villas