diff options
Diffstat (limited to 'lib/kernel/src/rpc.erl')
| -rw-r--r-- | lib/kernel/src/rpc.erl | 193 |
1 files changed, 165 insertions, 28 deletions
diff --git a/lib/kernel/src/rpc.erl b/lib/kernel/src/rpc.erl index e09acb5024..e214ffa404 100644 --- a/lib/kernel/src/rpc.erl +++ b/lib/kernel/src/rpc.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2010. All Rights Reserved. +%% Copyright Ericsson AB 1996-2011. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -263,14 +263,28 @@ proxy_user_flush() -> %% THE rpc client interface --spec call(node(), atom(), atom(), [term()]) -> term(). +-spec call(Node, Module, Function, Args) -> Res | {badrpc, Reason} when + Node :: node(), + Module :: module(), + Function :: atom(), + Args :: [term()], + Res :: term(), + Reason :: term(). call(N,M,F,A) when node() =:= N -> %% Optimize local call local_call(M, F, A); call(N,M,F,A) -> do_call(N, {call,M,F,A,group_leader()}, infinity). --spec call(node(), atom(), atom(), [term()], timeout()) -> term(). +-spec call(Node, Module, Function, Args, Timeout) -> + Res | {badrpc, Reason} when + Node :: node(), + Module :: module(), + Function :: atom(), + Args :: [term()], + Res :: term(), + Reason :: term(), + Timeout :: timeout(). call(N,M,F,A,_Timeout) when node() =:= N -> %% Optimize local call local_call(M,F,A); @@ -279,14 +293,28 @@ call(N,M,F,A,infinity) -> call(N,M,F,A,Timeout) when is_integer(Timeout), Timeout >= 0 -> do_call(N, {call,M,F,A,group_leader()}, Timeout). --spec block_call(node(), atom(), atom(), [term()]) -> term(). +-spec block_call(Node, Module, Function, Args) -> Res | {badrpc, Reason} when + Node :: node(), + Module :: module(), + Function :: atom(), + Args :: [term()], + Res :: term(), + Reason :: term(). block_call(N,M,F,A) when node() =:= N -> %% Optimize local call local_call(M,F,A); block_call(N,M,F,A) -> do_call(N, {block_call,M,F,A,group_leader()}, infinity). --spec block_call(node(), atom(), atom(), [term()], timeout()) -> term(). +-spec block_call(Node, Module, Function, Args, Timeout) -> + Res | {badrpc, Reason} when + Node :: node(), + Module :: module(), + Function :: atom(), + Args :: [term()], + Res :: term(), + Reason :: term(), + Timeout :: timeout(). block_call(N,M,F,A,_Timeout) when node() =:= N -> %% Optimize local call local_call(M, F, A); @@ -339,7 +367,13 @@ rpc_check(X) -> X. %% The entire call is packed into an atomic transaction which %% either succeeds or fails, i.e. never hangs (unless the server itself hangs). --spec server_call(node(), atom(), term(), term()) -> term() | {'error', 'nodedown'}. +-spec server_call(Node, Name, ReplyWrapper, Msg) -> Reply | {error, Reason} when + Node :: node(), + Name :: atom(), + ReplyWrapper :: term(), + Msg :: term(), + Reply :: term(), + Reason :: nodedown. server_call(Node, Name, ReplyWrapper, Msg) when is_atom(Node), is_atom(Name) -> @@ -362,7 +396,11 @@ server_call(Node, Name, ReplyWrapper, Msg) end end. --spec cast(node(), atom(), atom(), [term()]) -> 'true'. +-spec cast(Node, Module, Function, Args) -> true when + Node :: node(), + Module :: module(), + Function :: atom(), + Args :: [term()]. cast(Node, Mod, Fun, Args) when Node =:= node() -> catch spawn(Mod, Fun, Args), @@ -373,12 +411,17 @@ cast(Node, Mod, Fun, Args) -> %% Asynchronous broadcast, returns nothing, it's just send'n prey --spec abcast(atom(), term()) -> 'abcast'. +-spec abcast(Name, Msg) -> abcast when + Name :: atom(), + Msg :: term(). abcast(Name, Mess) -> abcast([node() | nodes()], Name, Mess). --spec abcast([node()], atom(), term()) -> 'abcast'. +-spec abcast(Nodes, Name, Msg) -> abcast when + Nodes :: [node()], + Name :: atom(), + Msg :: term(). abcast([Node|Tail], Name, Mess) -> Dest = {Name,Node}, @@ -396,23 +439,39 @@ abcast([], _,_) -> abcast. %% message when we return from the call, we can't know that they have %% processed the message though. --spec sbcast(atom(), term()) -> {[node()], [node()]}. +-spec sbcast(Name, Msg) -> {GoodNodes, BadNodes} when + Name :: atom(), + Msg :: term(), + GoodNodes :: [node()], + BadNodes :: [node()]. sbcast(Name, Mess) -> sbcast([node() | nodes()], Name, Mess). --spec sbcast([node()], atom(), term()) -> {[node()], [node()]}. +-spec sbcast(Nodes, Name, Msg) -> {GoodNodes, BadNodes} when + Name :: atom(), + Msg :: term(), + Nodes :: [node()], + GoodNodes :: [node()], + BadNodes :: [node()]. sbcast(Nodes, Name, Mess) -> Monitors = send_nodes(Nodes, ?NAME, {sbcast, Name, Mess}, []), rec_nodes(?NAME, Monitors). --spec eval_everywhere(atom(), atom(), [term()]) -> 'abcast'. +-spec eval_everywhere(Module, Function, Args) -> abcast when + Module :: module(), + Function :: atom(), + Args :: [term()]. eval_everywhere(Mod, Fun, Args) -> eval_everywhere([node() | nodes()] , Mod, Fun, Args). --spec eval_everywhere([node()], atom(), atom(), [term()]) -> 'abcast'. +-spec eval_everywhere(Nodes, Module, Function, Args) -> abcast when + Nodes :: [node()], + Module :: module(), + Function :: atom(), + Args :: [term()]. eval_everywhere(Nodes, Mod, Fun, Args) -> gen_server:abcast(Nodes, ?NAME, {cast,Mod,Fun,Args,group_leader()}). @@ -453,20 +512,45 @@ unmonitor(Ref) when is_reference(Ref) -> %% Call apply(M,F,A) on all nodes in parallel --spec multicall(atom(), atom(), [term()]) -> {[_], [node()]}. +-spec multicall(Module, Function, Args) -> {ResL, BadNodes} when + Module :: module(), + Function :: atom(), + Args :: [term()], + ResL :: [term()], + BadNodes :: [node()]. multicall(M, F, A) -> multicall(M, F, A, infinity). --spec multicall([node()], atom(), atom(), [term()]) -> {[_], [node()]} - ; (atom(), atom(), [term()], timeout()) -> {[_], [node()]}. +-spec multicall(Nodes, Module, Function, Args) -> {ResL, BadNodes} when + Nodes :: [node()], + Module :: module(), + Function :: atom(), + Args :: [term()], + ResL :: [term()], + BadNodes :: [node()]; + (Module, Function, Args, Timeout) -> {ResL, BadNodes} when + Module :: module(), + Function :: atom(), + Args :: [term()], + Timeout :: timeout(), + ResL :: [term()], + BadNodes :: [node()]. multicall(Nodes, M, F, A) when is_list(Nodes) -> multicall(Nodes, M, F, A, infinity); multicall(M, F, A, Timeout) -> multicall([node() | nodes()], M, F, A, Timeout). --spec multicall([node()], atom(), atom(), [term()], timeout()) -> {[_], [node()]}. +-spec multicall(Nodes, Module, Function, Args, Timeout) -> + {ResL, BadNodes} when + Nodes :: [node()], + Module :: module(), + Function :: atom(), + Args :: [term()], + Timeout :: timeout(), + ResL :: [term()], + BadNodes :: [node()]. multicall(Nodes, M, F, A, infinity) when is_list(Nodes), is_atom(M), is_atom(F), is_list(A) -> @@ -495,12 +579,21 @@ do_multicall(Nodes, M, F, A, Timeout) -> %% %% There is no apparent order among the replies. --spec multi_server_call(atom(), term()) -> {[_], [node()]}. +-spec multi_server_call(Name, Msg) -> {Replies, BadNodes} when + Name :: atom(), + Msg :: term(), + Replies :: [Reply :: term()], + BadNodes :: [node()]. multi_server_call(Name, Msg) -> multi_server_call([node() | nodes()], Name, Msg). --spec multi_server_call([node()], atom(), term()) -> {[_], [node()]}. +-spec multi_server_call(Nodes, Name, Msg) -> {Replies, BadNodes} when + Nodes :: [node()], + Name :: atom(), + Msg :: term(), + Replies :: [Reply :: term()], + BadNodes :: [node()]. multi_server_call(Nodes, Name, Msg) when is_list(Nodes), is_atom(Name) -> @@ -509,9 +602,22 @@ multi_server_call(Nodes, Name, Msg) %% Deprecated functions. Were only needed when communicating with R6 nodes. +-spec safe_multi_server_call(Name, Msg) -> {Replies, BadNodes} when + Name :: atom(), + Msg :: term(), + Replies :: [Reply :: term()], + BadNodes :: [node()]. + safe_multi_server_call(Name, Msg) -> multi_server_call(Name, Msg). +-spec safe_multi_server_call(Nodes, Name, Msg) -> {Replies, BadNodes} when + Nodes :: [node()], + Name :: atom(), + Msg :: term(), + Replies :: [Reply :: term()], + BadNodes :: [node()]. + safe_multi_server_call(Nodes, Name, Msg) -> multi_server_call(Nodes, Name, Msg). @@ -539,7 +645,14 @@ rec_nodes(Name, [{N,R} | Tail], Badnodes, Replies) -> %% rpc's towards the same node. I.e. it returns immediately and %% it returns a Key that can be used in a subsequent yield(Key). --spec async_call(node(), atom(), atom(), [term()]) -> pid(). +-opaque key() :: pid(). + +-spec async_call(Node, Module, Function, Args) -> Key when + Node :: node(), + Module :: module(), + Function :: atom(), + Args :: [term()], + Key :: key(). async_call(Node, Mod, Fun, Args) -> ReplyTo = self(), @@ -549,20 +662,28 @@ async_call(Node, Mod, Fun, Args) -> ReplyTo ! {self(), {promise_reply, R}} %% self() is key end). --spec yield(pid()) -> term(). +-spec yield(Key) -> Res | {badrpc, Reason} when + Key :: key(), + Res :: term(), + Reason :: term(). yield(Key) when is_pid(Key) -> {value,R} = do_yield(Key, infinity), R. --spec nb_yield(pid(), timeout()) -> {'value', _} | 'timeout'. +-spec nb_yield(Key, Timeout) -> {value, Val} | timeout when + Key :: key(), + Timeout :: timeout(), + Val :: (Res :: term()) | {badrpc, Reason :: term()}. nb_yield(Key, infinity=Inf) when is_pid(Key) -> do_yield(Key, Inf); nb_yield(Key, Timeout) when is_pid(Key), is_integer(Timeout), Timeout >= 0 -> do_yield(Key, Timeout). --spec nb_yield(pid()) -> {'value', _} | 'timeout'. +-spec nb_yield(Key) -> {value, Val} | timeout when + Key :: key(), + Val :: (Res :: term()) | {badrpc, Reason :: term()}. nb_yield(Key) when is_pid(Key) -> do_yield(Key, 0). @@ -582,7 +703,12 @@ do_yield(Key, Timeout) -> %% ArgL === [{M,F,Args},........] %% Returns a lists of the evaluations in the same order as %% given to ArgL --spec parallel_eval([{atom(), atom(), [_]}]) -> [_]. +-spec parallel_eval(FuncCalls) -> ResL when + FuncCalls :: [{Module, Function, Args}], + Module :: module(), + Function :: atom(), + Args :: [term()], + ResL :: [term()]. parallel_eval(ArgL) -> Nodes = [node() | nodes()], @@ -599,7 +725,13 @@ map_nodes([{M,F,A}|Tail],[Node|MoreNodes], Original) -> %% Parallel version of lists:map/3 with exactly the same %% arguments and return value as lists:map/3, %% except that it calls exit/1 if a network error occurs. --spec pmap({atom(),atom()}, [term()], [term()]) -> [term()]. +-spec pmap(FuncSpec, ExtraArgs, List1) -> List2 when + FuncSpec :: {Module,Function}, + Module :: module(), + Function :: atom(), + ExtraArgs :: [term()], + List1 :: [Elem :: term()], + List2 :: [term()]. pmap({M,F}, As, List) -> check(parallel_eval(build_args(M,F,As, List, [])), []). @@ -616,15 +748,20 @@ check([], Ack) -> Ack. %% location transparent version of process_info --spec pinfo(pid()) -> [{atom(), _}] | 'undefined'. +-spec pinfo(Pid) -> [{Item, Info}] | undefined when + Pid :: pid(), + Item :: atom(), + Info :: term(). pinfo(Pid) when node(Pid) =:= node() -> process_info(Pid); pinfo(Pid) -> call(node(Pid), erlang, process_info, [Pid]). --spec pinfo(pid(), Item) -> {Item, _} | 'undefined' | [] - when is_subtype(Item, atom()). +-spec pinfo(Pid, Item) -> {Item, Info} | undefined | [] when + Pid :: pid(), + Item :: atom(), + Info :: term(). pinfo(Pid, Item) when node(Pid) =:= node() -> process_info(Pid, Item); |