1 files changed, 65 insertions, 0 deletions
diff --git a/klm/search/context.hh b/klm/search/context.hh
new file mode 100644
index 00000000..27940053
--- /dev/null
+++ b/klm/search/context.hh
@@ -0,0 +1,65 @@
+#ifndef SEARCH_CONTEXT__
+#define SEARCH_CONTEXT__
+
+#include "lm/model.hh"
+#include "search/config.hh"
+#include "search/final.hh"
+#include "search/types.hh"
+#include "search/vertex.hh"
+#include "util/exception.hh"
+
+#include <boost/pool/object_pool.hpp>
+#include <boost/ptr_container/ptr_vector.hpp>
+
+#include <vector>
+
+namespace search {
+
+class Weights;
+
+class ContextBase {
+  public:
+    explicit ContextBase(const Config &config) : pop_limit_(config.PopLimit()), weights_(config.GetWeights()) {}
+
+    Final *NewFinal() {
+     Final *ret = final_pool_.construct();
+     assert(ret);
+     return ret;
+    }
+
+    VertexNode *NewVertexNode() {
+      VertexNode *ret = vertex_node_pool_.construct();
+      assert(ret);
+      return ret;
+    }
+
+    void DeleteVertexNode(VertexNode *node) {
+      vertex_node_pool_.destroy(node);
+    }
+
+    unsigned int PopLimit() const { return pop_limit_; }
+
+    const Weights &GetWeights() const { return weights_; }
+
+  private:
+    boost::object_pool<Final> final_pool_;
+    boost::object_pool<VertexNode> vertex_node_pool_;
+
+    unsigned int pop_limit_;
+
+    const Weights &weights_;
+};
+
+template <class Model> class Context : public ContextBase {
+  public:
+    Context(const Config &config, const Model &model) : ContextBase(config), model_(model) {}
+
+    const Model &LanguageModel() const { return model_; }
+
+  private:
+    const Model &model_;
+};
+
+} // namespace search
+
+#endif // SEARCH_CONTEXT__