diff options
Diffstat (limited to 'lib/nt_ffi.ml')
| -rw-r--r-- | lib/nt_ffi.ml | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/lib/nt_ffi.ml b/lib/nt_ffi.ml deleted file mode 100644 index 4d73c32..0000000 --- a/lib/nt_ffi.ml +++ /dev/null @@ -1,178 +0,0 @@ -(* Low-level ctypes bindings to RNT_C_API.h. - This module is internal to Nt — never import it anywhere else. *) - -open Ctypes -open Foreign - -let fn name typ = foreign name typ - -(* Runtime ----------------------------------------------------------------- *) -let rnt_init = fn "rnt_init" (string @-> string @-> returning int) - -(* Auth -------------------------------------------------------------------- *) -let rnt_firewall = fn "rnt_firewall" (string @-> ptr (ptr char) @-> returning int) - -(* Session lifecycle ------------------------------------------------------- *) -let rnt_session_open = fn "rnt_session_open" (ptr void @-> ptr (ptr char) @-> returning int) -let rnt_session_close = fn "rnt_session_close" (string @-> returning int) - -let rnt_session_set_branch = - fn "rnt_session_set_branch" (string @-> string @-> string @-> returning int) - -(* Ephemeral relations ------------------------------------------------------ *) - -(* rnt_generator_fn: (ctx, args, offset, limit, sink) -> int. - OCaml closures passed here cross into C; the closure must stay reachable - for as long as RNT may invoke it (Nt retains them, see - Nt.retained_generators). *) -let rnt_generator_fn = - funptr (ptr void @-> string @-> size_t @-> size_t @-> ptr void @-> returning int) - -let rnt_sink_emit = fn "rnt_sink_emit" (ptr void @-> string @-> returning int) - -let rnt_register_ephemeral_relation = - fn "rnt_register_ephemeral_relation" - ( string - @-> int - @-> string - @-> rnt_generator_fn - @-> ptr void - @-> int - @-> string - @-> string - @-> string - @-> ptr (ptr char) - @-> returning int ) - -let rnt_drop_ephemeral_relation = - fn "rnt_drop_ephemeral_relation" (string @-> string @-> returning int) - -(* Handle lifecycle -------------------------------------------------------- *) -let rnt_open_handle = fn "rnt_open_handle" (string @-> ptr void @-> returning (ptr void)) -let rnt_close_handle = fn "rnt_close_handle" (ptr void @-> returning int) - -(* Branch hash-pointer ----------------------------------------------------- *) -let rnt_branch_target = fn "rnt_branch_target" (ptr void @-> ptr (ptr char) @-> returning int) -let rnt_branch_advance = fn "rnt_branch_advance" (string @-> string @-> returning int) - -(* Object registration ----------------------------------------------------- *) -let rnt_register_relation = fn "rnt_register_relation" (string @-> returning int) -let rnt_register_branch = fn "rnt_register_branch" (string @-> string @-> returning int) - -(* Branch / snapshot relation enumeration ----------------------------------- *) -let rnt_list_relations = fn "rnt_list_relations" (string @-> ptr (ptr char) @-> returning int) - -let rnt_list_branch_multigroups = - fn "rnt_list_branch_multigroups" (string @-> ptr (ptr char) @-> returning int) - -let rnt_list_snapshot_relations = - fn "rnt_list_snapshot_relations" (string @-> ptr (ptr char) @-> returning int) - -(* Tuple storage ----------------------------------------------------------- *) -let rnt_link_tuple = fn "rnt_link_tuple" (string @-> string @-> ptr (ptr char) @-> returning int) -let rnt_unlink_tuple = fn "rnt_unlink_tuple" (string @-> string @-> returning int) -let rnt_clear_relation = fn "rnt_clear_relation" (string @-> returning int) -let rnt_relation_root = fn "rnt_relation_root" (string @-> ptr (ptr char) @-> returning int) - -(* Cursor and VM ----------------------------------------------------------- *) -let rnt_cursor_open = fn "rnt_cursor_open" (ptr void @-> returning (ptr void)) -let rnt_cursor_next = fn "rnt_cursor_next" (ptr void @-> ptr (ptr char) @-> returning int) -let rnt_cursor_close = fn "rnt_cursor_close" (ptr void @-> returning int) - -(* VM plan builder --------------------------------------------------------- *) - -(* For PlanAction in RNT_C_API.h, where one context struct per operator is laid - side by side (no unions unfortunately as ctypes has no union support 🤡, and - the C side reads only the member matching [operation]). Strings are passed - as [ptr char]; the caller owns the backing CArray and must keep it alive across - the rnt_plan_assemble call (the C side copies immediately). *) - -type plan_args_scan - -let plan_args_scan : plan_args_scan structure typ = structure "PlanArgsScan" -let scan_relation_path = field plan_args_scan "relation_path" (ptr char) -let () = seal plan_args_scan - -type plan_args_join - -let plan_args_join : plan_args_join structure typ = structure "PlanArgsJoin" -let join_left = field plan_args_join "left" (ptr void) -let join_right = field plan_args_join "right" (ptr void) -let join_attrs = field plan_args_join "attrs" (ptr (ptr char)) -let () = seal plan_args_join - -type plan_args_take - -let plan_args_take : plan_args_take structure typ = structure "PlanArgsTake" -let take_source = field plan_args_take "source" (ptr void) -let take_limit = field plan_args_take "limit" size_t -let () = seal plan_args_take - -type plan_args_project - -let plan_args_project : plan_args_project structure typ = structure "PlanArgsProject" -let project_source = field plan_args_project "source" (ptr void) -let project_attrs = field plan_args_project "attrs" (ptr (ptr char)) -let () = seal plan_args_project - -type plan_action - -let plan_action : plan_action structure typ = structure "PlanAction" -let action_operation = field plan_action "operation" int -let action_scan = field plan_action "scan" plan_args_scan -let action_join = field plan_action "join" plan_args_join -let action_take = field plan_action "take" plan_args_take -let action_project = field plan_action "project" plan_args_project -let () = seal plan_action - -(* nt::Operation values, RNT include/VM.h *) -let fol_operation_scan = 1 -let fol_operation_join = 2 -let fol_operation_take = 3 -let fol_operation_project = 4 -let rnt_plan_assemble = fn "rnt_plan_assemble" (plan_action @-> returning (ptr void)) -let rnt_plan_free = fn "rnt_plan_free" (ptr void @-> returning void) -let rnt_vm_execute_plan = fn "rnt_vm_execute_plan" (ptr void @-> returning (ptr void)) -let rnt_vm_cursor_next = fn "rnt_vm_cursor_next" (ptr void @-> ptr (ptr char) @-> returning int) -let rnt_vm_cursor_close = fn "rnt_vm_cursor_close" (ptr void @-> returning int) - -(* Memory management ------------------------------------------------------- *) -let rnt_free_string = fn "rnt_free_string" (ptr char @-> returning void) -let rnt_free_bytes = fn "rnt_free_bytes" (ptr uint8_t @-> returning void) - -(* -------------------------------------------------------------------------- - Helpers shared by Nt (not exported from the library module) - -------------------------------------------------------------------------- *) - -let null_char_ptr : char ptr = from_voidp char null - -let cstring (s : string) : char CArray.t = - let n = String.length s in - let arr = CArray.make char (n + 1) in - String.iteri (CArray.set arr) s; - CArray.set arr n '\000'; - arr - -(* Reads a null-terminated C string from a char pointer, then frees it. *) -let consume_cstring (p : char ptr) : string = - let n = ref 0 in - while !@(p +@ !n) <> '\000' do - incr n - done; - let s = string_from_ptr p ~length:!n in - rnt_free_string p; s - -(* Allocates a char* out-parameter, calls [f], returns the rc and string. *) -let with_out_string (f : char ptr ptr -> int) : int * string option = - let pp = allocate (ptr char) null_char_ptr in - let rc = f pp in - let p = !@pp in - if is_null p then rc, None else rc, Some (consume_cstring p) - -(* Converts a void* (returned from open_handle / cursor_open) to nativeint. - Returns None when the pointer is NULL (failure). *) -let ptr_to_opt (p : unit ptr) : nativeint option = - if is_null p then None else Some (raw_address_of_ptr p) - -(* Converts a stored nativeint back to a void* for API calls. *) -let nint_to_ptr (n : nativeint) : unit ptr = ptr_of_raw_address n |