gras: created uid API - replaces name and unique_id

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/element_uid.cpp b/lib/element_uid.cpp
new file mode 100644
index 0000000..89035b4
--- /dev/null
+++ b/lib/element_uid.cpp
@@ -0,0 +1,46 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#include "element_impl.hpp"
+#include <gras/element.hpp>
+#include <boost/thread/mutex.hpp>
+#include <stdexcept>
+#include <set>
+
+using namespace gras;
+
+static boost::mutex uid_mutex;
+static std::set<std::string> &get_uid_set(void)
+{
+    static std::set<std::string> uid_set;
+    return uid_set;
+}
+
+static void free_uid(void *p)
+{
+    boost::mutex::scoped_lock l(uid_mutex);
+    std::string *uid = reinterpret_cast<std::string *>(p);
+    get_uid_set().erase(*uid);
+    delete uid;
+}
+
+void Element::set_uid(const std::string &uid)
+{
+    boost::mutex::scoped_lock l(uid_mutex);
+    if (get_uid_set().count(uid) > 0)
+    {
+        throw std::invalid_argument("Element::set_uid - uid already in use: " + uid);
+    }
+    (*this)->uid.reset(new std::string(uid), &free_uid);
+    get_uid_set().insert(uid);
+}
+
+std::string Element::get_uid(void) const
+{
+    boost::mutex::scoped_lock l(uid_mutex);
+    return *((*this)->uid);
+}
+
+std::string Element::to_string(void) const
+{
+    return (*this)->repr;
+}