daemon: Implement 'set_variables' (atomic set multiple variables) call.

diff --git a/daemon/daemon.ml b/daemon/daemon.ml
index ed5e067..8929cfa 100644 (file)
--- a/daemon/daemon.ml
+++ b/daemon/daemon.ml
@@ -79,6 +79,7 @@ let rec init j d =
       ~proc_cancel_job
       ~proc_start_job
       ~proc_get_job
+      ~proc_set_variables
       (Rpc_server.Unix addr)
       Rpc.Tcp (* not TCP, this is the same as SOCK_STREAM *)
       Rpc.Socket
@@ -180,6 +181,38 @@ and proc_get_job serial =
   | Not_found -> failwith "job not found"
   | exn -> failwith (Printexc.to_string exn)
 
+and proc_set_variables vars =
+  try
+    let vars = Array.map (
+      fun { Whenproto_aux.sv_name = name; sv_value = value } ->
+        name, variable_of_rpc value
+    ) vars in
+    let vars = Array.to_list vars in
+
+    if !debug then
+      Syslog.notice "remote call: set_variables (%s)"
+        (String.concat " "
+           (List.map (
+             fun (name, value) ->
+               sprintf "%s=%s" name (string_of_variable value)
+            ) vars));
+
+    List.iter (fun (name, _) -> check_valid_variable_name name) vars;
+
+    (* Update all the variables atomically. *)
+    let s = List.fold_left (
+      fun s (name, value) -> Whenstate.set_variable s name value
+    ) !state vars in
+    state := s;
+
+    (* Which jobs need to be re-evaluated? *)
+    let jobs = Whenstate.get_dependencies !state (List.map fst vars) in
+    reevaluate_whenjobs jobs;
+
+    `ok
+  with
+    Failure msg -> `error msg
+
 (* Reload the jobs file. *)
 and reload_file () =
   let file = sprintf "%s/jobs.cmo" !jobsdir in

diff --git a/lib/whenproto.x b/lib/whenproto.x
index 5754821..f7ea513 100644 (file)
--- a/lib/whenproto.x
+++ b/lib/whenproto.x
@@ -70,6 +70,12 @@ union variable switch (variable_type t) {
    double f;                    /* C 'double' maps to an OCaml 'float' */
 };
 
+struct set_variable {
+  variable_name sv_name;
+  variable sv_value;
+};
+typedef set_variable set_variable_list<>;
+
 struct job {
   job_name job_name;
   string_big_int job_serial;
@@ -91,5 +97,6 @@ program When {
     status cancel_job (string_big_int) = 7;
     status start_job (job_name) = 8;
     job get_job (string_big_int) = 9;
+    status set_variables (set_variable_list) = 10;
   } = 1;
 } = 0x20008081;