1 files changed, 31 insertions, 0 deletions
diff --git a/mod/build-config.cxx b/mod/build-config.cxx
new file mode 100644
index 0000000..11be1b9
--- /dev/null
+++ b/mod/build-config.cxx
@@ -0,0 +1,31 @@
+// file      : mod/build-config.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <mod/build-config>
+
+#include <map>
+
+namespace brep
+{
+  using namespace bbot;
+
+  shared_ptr<const build_configs>
+  shared_build_config (const path& p)
+  {
+    static std::map<path, weak_ptr<build_configs>> configs;
+
+    auto i (configs.find (p));
+    if (i != configs.end ())
+    {
+      if (shared_ptr<build_configs> c = i->second.lock ())
+        return c;
+    }
+
+    shared_ptr<build_configs> c (
+      make_shared<build_configs> (parse_buildtab (p)));
+
+    configs[p] = c;
+    return c;
+  }
+}