Create biergarten brewery pipeline project (#199)

pipeline/includes/llama_backend_state.h

@@ -0,0 +1,32 @@
+#ifndef BIERGARTEN_PIPELINE_INCLUDES_LLAMA_BACKEND_STATE_H_
+#define BIERGARTEN_PIPELINE_INCLUDES_LLAMA_BACKEND_STATE_H_
+
+/**
+ * @file llama_backend_state.h
+ * @brief RAII guard for llama.cpp backend process lifetime.
+ */
+
+#include <llama.h>
+
+/**
+ * @brief RAII wrapper for llama_backend_init and llama_backend_free.
+ *
+ * Create one instance in application startup before using llama.cpp and keep
+ * it alive for application lifetime.
+ */
+class LlamaBackendState {
+ public:
+  /// @brief Initializes global llama backend state.
+  LlamaBackendState() { llama_backend_init(); }
+
+  /// @brief Cleans up global llama backend state.
+  ~LlamaBackendState() { llama_backend_free(); }
+
+  /// @brief Non-copyable type.
+  LlamaBackendState(const LlamaBackendState&) = delete;
+
+  /// @brief Non-copyable type.
+  LlamaBackendState& operator=(const LlamaBackendState&) = delete;
+};
+
+#endif  // BIERGARTEN_PIPELINE_INCLUDES_LLAMA_BACKEND_STATE_H_