Add basic class along with exception and attach

Signed-off-by: varun-r-mallya <varunrmallya@gmail.com>

src/core/bpf_program.h

@@ -0,0 +1,29 @@
+#ifndef PYLIBBPF_BPF_PROGRAM_H
+#define PYLIBBPF_BPF_PROGRAM_H
+
+#include "libbpf.h"
+#include <pybind11/stl.h>
+#include <string>
+
+namespace py = pybind11;
+
+class BpfProgram {
+private:
+    struct bpf_object* obj_;
+    struct bpf_program* prog_;
+    struct bpf_link* link_;
+    std::string object_path_;
+    std::string program_name_;
+
+public:
+    explicit BpfProgram(const std::string& object_path, const std::string& program_name = "");
+    ~BpfProgram();
+
+    bool load();
+    bool attach();
+
+    bool is_loaded() const { return obj_ != nullptr; }
+    bool is_attached() const { return link_ != nullptr; }
+};
+
+#endif //PYLIBBPF_BPF_PROGRAM_H