change filenames and directory structure to use halo (#81)

include/halo/halo.h

@@ -0,0 +1,67 @@
+#ifndef HALO_INCLUDE_HALO_H
+#define HALO_INCLUDE_HALO_H
+
+#include <vector>
+#include <unordered_map>
+
+typedef size_t ObjRef;
+typedef size_t WorkerId;
+typedef size_t ObjStoreId;
+typedef size_t OperationId;
+
+class FnInfo {
+  size_t num_return_vals_;
+  std::vector<WorkerId> workers_; // `workers_` is a sorted vector
+public:
+  void set_num_return_vals(size_t num) {
+    num_return_vals_ = num;
+  }
+  size_t num_return_vals() const {
+    return num_return_vals_;
+  }
+  void add_worker(WorkerId workerid) {
+    // insert `workerid` into `workers_` so that `workers_` stays sorted
+    workers_.insert(std::lower_bound(workers_.begin(), workers_.end(), workerid), workerid);
+  }
+  size_t num_workers() const {
+    return workers_.size();
+  }
+  const std::vector<WorkerId>& workers() const {
+    return workers_;
+  }
+};
+
+typedef std::vector<std::vector<ObjStoreId> > ObjTable;
+typedef std::unordered_map<std::string, FnInfo> FnTable;
+
+#define HALO_VERBOSE -1
+#define HALO_INFO 0
+#define HALO_DEBUG 1
+#define HALO_FATAL 2
+#define HALO_REFCOUNT HALO_VERBOSE
+#define HALO_ALIAS HALO_VERBOSE
+
+#define HALO_LOG(LEVEL, MESSAGE) \
+  if (LEVEL == HALO_VERBOSE) { \
+    \
+  } else if (LEVEL == HALO_FATAL) { \
+    std::cerr << "fatal error occured: " << MESSAGE << std::endl; \
+    std::exit(1); \
+  } else if (LEVEL == HALO_DEBUG) { \
+    \
+  } else { \
+    std::cout << MESSAGE << std::endl; \
+  }
+
+class objstore_not_registered_error : public std::runtime_error
+{
+public:
+  objstore_not_registered_error(const std::string& msg) : std::runtime_error(msg) {}
+};
+
+struct slice {
+  uint8_t* data;
+  size_t len;
+};
+
+#endif