xo-gc: + CollectorTypeRegistry for streamlined init

xo-gc/src/gc/CMakeLists.txt

@@ -3,8 +3,11 @@
 set(SELF_LIB xo_gc)
 set(SELF_SRCS
 
+    CollectorTypeRegistry.cpp
+
     ICollector_Any.cpp
     IGCObject_Any.cpp
+
     IAllocator_DX1Collector.cpp
     ICollector_DX1Collector.cpp
     IAllocIterator_DX1CollectorIterator.cpp

xo-gc/src/gc/CollectorTypeRegistry.cpp

@@ -0,0 +1,45 @@
+/** @file CollectorTypeRegistry.cpp
+ **/
+
+#include "CollectorTypeRegistry.hpp"
+#include <xo/indentlog/scope.hpp>
+
+namespace xo {
+    namespace mm {
+        CollectorTypeRegistry &
+        CollectorTypeRegistry::instance() {
+            static CollectorTypeRegistry s_instance;
+
+            return s_instance;
+        }
+
+        void
+        CollectorTypeRegistry::register_types(init_function_type fn) {
+            scope log(XO_DEBUG(true));
+
+            init_seq_v_.push_back(fn);
+        }
+
+        bool
+        CollectorTypeRegistry::install_types(obj<ACollector> gc) {
+            scope log(XO_DEBUG(true));
+
+            bool ok = true;
+
+            size_t i = 0;
+            size_t n = init_seq_v_.size();
+            log && log("run n init steps", xtag("n", n));
+
+            for (const auto & fn : init_seq_v_) {
+                log && log("do install fn (", i+1, "/", n, ")");
+
+                ok = ok & fn(gc);
+            }
+
+            return ok;
+        }
+
+    } /*namespace mm*/
+} /*namespace xo*/
+
+/* end CollectorTypeRegistry.cpp */