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authorFredrik Gustafsson <[email protected]>2013-04-15 11:57:40 +0200
committerFredrik Gustafsson <[email protected]>2013-04-15 11:57:40 +0200
commit8e236f7c5a0c6383e5f604a781e68b1685127e15 (patch)
treefaf91cbdaa25d71b01e5bfddcfda7bb1d675e7c5 /lib
parentf7641c8aafecc7b54b3f6f226892f825ac19f63a (diff)
parentc82e9fad33302ff24fdddbd50f110c06d4eb81d4 (diff)
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Merge branch 'lh/demonitor-flush/OTP-11039' into maint
* lh/demonitor-flush/OTP-11039: Use erlang:demonitor(Ref, [flush]) where applicable
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/test/receive_SUITE_data/ref_opt/yes_5.erl6
-rw-r--r--lib/debugger/src/dbg_debugged.erl14
-rw-r--r--lib/et/src/et_collector.erl9
-rw-r--r--lib/kernel/src/application_master.erl9
-rw-r--r--lib/kernel/src/disk_log.erl18
-rw-r--r--lib/kernel/src/file_io_server.erl3
-rw-r--r--lib/kernel/src/file_server.erl3
-rw-r--r--lib/kernel/src/inet_gethost_native.erl3
-rw-r--r--lib/kernel/src/rpc.erl24
-rw-r--r--lib/kernel/test/gen_sctp_SUITE.erl3
-rw-r--r--lib/orber/src/orber_iiop_outproxy.erl35
-rw-r--r--lib/runtime_tools/src/dbg.erl6
-rw-r--r--lib/snmp/src/agent/snmpa_target_cache.erl37
-rw-r--r--lib/stdlib/src/dets.erl9
-rw-r--r--lib/stdlib/src/epp.erl3
-rw-r--r--lib/stdlib/src/gen_server.erl18
-rw-r--r--lib/stdlib/src/io.erl6
-rw-r--r--lib/tools/src/fprof.erl8
18 files changed, 48 insertions, 166 deletions
diff --git a/lib/compiler/test/receive_SUITE_data/ref_opt/yes_5.erl b/lib/compiler/test/receive_SUITE_data/ref_opt/yes_5.erl
index 3f02fba6a6..5070e3e546 100644
--- a/lib/compiler/test/receive_SUITE_data/ref_opt/yes_5.erl
+++ b/lib/compiler/test/receive_SUITE_data/ref_opt/yes_5.erl
@@ -24,11 +24,7 @@ do_call(Process, Label, Request, Timeout) ->
{'DOWN', Mref, _, _, Reason} ->
exit(Reason)
after Timeout ->
- erlang:demonitor(Mref),
- receive
- {'DOWN', Mref, _, _, _} -> true
- after 0 -> true
- end,
+ erlang:demonitor(Mref, [flush]),
exit(timeout)
end
catch
diff --git a/lib/debugger/src/dbg_debugged.erl b/lib/debugger/src/dbg_debugged.erl
index c21ad486e8..d8285d7288 100644
--- a/lib/debugger/src/dbg_debugged.erl
+++ b/lib/debugger/src/dbg_debugged.erl
@@ -19,8 +19,6 @@
-module(dbg_debugged).
%% External exports
-%% Avoid warning for local function demonitor/1 clashing with autoimported BIF.
--compile({no_auto_import,[demonitor/1]}).
-export([eval/3]).
%%====================================================================
@@ -47,7 +45,7 @@ msg_loop(Meta, Mref, SaveStacktrace) ->
%% Evaluated function has returned a value
{sys, Meta, {ready, Val}} ->
- demonitor(Mref),
+ erlang:demonitor(Mref, [flush]),
%% Restore original stacktrace and return the value
try erlang:raise(throw, stack, SaveStacktrace)
@@ -63,7 +61,7 @@ msg_loop(Meta, Mref, SaveStacktrace) ->
%% Evaluated function raised an (uncaught) exception
{sys, Meta, {exception,{Class,Reason,Stacktrace}}} ->
- demonitor(Mref),
+ erlang:demonitor(Mref, [flush]),
%% ...raise the same exception
erlang:error(erlang:raise(Class, Reason, Stacktrace),
@@ -107,14 +105,6 @@ reply({eval,Expr,Bs}) ->
%% Bindings is an orddict (sort them)
erl_eval:expr(Expr, lists:sort(Bs)). % {value, Value, Bs2}
-%% Demonitor and delete message from inbox
-%%
-demonitor(Mref) ->
- erlang:demonitor(Mref),
- receive {'DOWN',Mref,_,_,_} -> ok
- after 0 -> ok
- end.
-
%% Fix stacktrace - keep all above call to this module.
%%
stacktrace_f([]) -> [];
diff --git a/lib/et/src/et_collector.erl b/lib/et/src/et_collector.erl
index a63d15fb4c..ce8cf6d4e0 100644
--- a/lib/et/src/et_collector.erl
+++ b/lib/et/src/et_collector.erl
@@ -654,13 +654,8 @@ start_trace_client(CollectorPid, Type, FileName) when Type =:= file ->
Ref = erlang:monitor(process, Pid),
receive
WaitFor ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, _, _, _} ->
- file_loaded
- after 0 ->
- file_loaded
- end;
+ erlang:demonitor(Ref, [flush]),
+ file_loaded;
{'DOWN', Ref, _, _, Reason} ->
exit(Reason)
end;
diff --git a/lib/kernel/src/application_master.erl b/lib/kernel/src/application_master.erl
index 679fefaed9..34a3efcaf2 100644
--- a/lib/kernel/src/application_master.erl
+++ b/lib/kernel/src/application_master.erl
@@ -76,13 +76,8 @@ call(AppMaster, Req) ->
{'DOWN', Ref, process, _, _Info} ->
ok;
{Tag, Res} ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, process, _, _Info} ->
- Res
- after 0 ->
- Res
- end
+ erlang:demonitor(Ref, [flush]),
+ Res
end.
%%%-----------------------------------------------------------------
diff --git a/lib/kernel/src/disk_log.erl b/lib/kernel/src/disk_log.erl
index 0c5af2857e..c238eff12f 100644
--- a/lib/kernel/src/disk_log.erl
+++ b/lib/kernel/src/disk_log.erl
@@ -1914,13 +1914,8 @@ multi_req(Msg, Pids) ->
{'DOWN', Ref, process, Pid, _Info} ->
Reply;
{disk_log, Pid, _Reply} ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, process, Pid, _Reason} ->
- ok
- after 0 ->
- ok
- end
+ erlang:demonitor(Ref, [flush]),
+ ok
end
end, {error, nonode}, Refs).
@@ -1965,13 +1960,8 @@ monitor_request(Pid, Req) ->
{error, no_such_log};
{disk_log, Pid, Reply} when not is_tuple(Reply) orelse
element(2, Reply) =/= disk_log_stopped ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, process, Pid, _Reason} ->
- Reply
- after 0 ->
- Reply
- end
+ erlang:demonitor(Ref, [flush]),
+ Reply
end.
req2(Pid, R) ->
diff --git a/lib/kernel/src/file_io_server.erl b/lib/kernel/src/file_io_server.erl
index fad2ed7fb3..07fb55f390 100644
--- a/lib/kernel/src/file_io_server.erl
+++ b/lib/kernel/src/file_io_server.erl
@@ -92,8 +92,7 @@ do_start(Spawn, Owner, FileName, ModeList) ->
Mref = erlang:monitor(process, Pid),
receive
{Ref, {error, _Reason} = Error} ->
- erlang:demonitor(Mref),
- receive {'DOWN', Mref, _, _, _} -> ok after 0 -> ok end,
+ erlang:demonitor(Mref, [flush]),
Error;
{Ref, ok} ->
erlang:demonitor(Mref),
diff --git a/lib/kernel/src/file_server.erl b/lib/kernel/src/file_server.erl
index 49ec6f96cc..d036dbb516 100644
--- a/lib/kernel/src/file_server.erl
+++ b/lib/kernel/src/file_server.erl
@@ -317,8 +317,7 @@ do_start_slave(start, Filer, Name) ->
SlaveMonitor = erlang:monitor(process, Slave),
receive
{started, Token} ->
- erlang:demonitor(SlaveMonitor),
- receive {'DOWN', SlaveMonitor, _, _, _} -> ok after 0 -> ok end,
+ erlang:demonitor(SlaveMonitor, [flush]),
{ok, Slave};
{'DOWN', SlaveMonitor, _, _, Reason} ->
exit(Reason)
diff --git a/lib/kernel/src/inet_gethost_native.erl b/lib/kernel/src/inet_gethost_native.erl
index db3e44ce6f..df866660b4 100644
--- a/lib/kernel/src/inet_gethost_native.erl
+++ b/lib/kernel/src/inet_gethost_native.erl
@@ -503,8 +503,7 @@ getit(Req, DefaultName) ->
Pid, Reason} ->
{error, Reason}
end,
- catch erlang:demonitor(Ref2),
- receive {'DOWN',Ref2,_,_,_} -> ok after 0 -> ok end,
+ catch erlang:demonitor(Ref2, [flush]),
Res2
end.
diff --git a/lib/kernel/src/rpc.erl b/lib/kernel/src/rpc.erl
index 7c965ca384..83e0b59cc2 100644
--- a/lib/kernel/src/rpc.erl
+++ b/lib/kernel/src/rpc.erl
@@ -388,13 +388,8 @@ server_call(Node, Name, ReplyWrapper, Msg)
{'DOWN', Ref, _, _, _} ->
{error, nodedown};
{ReplyWrapper, Node, Reply} ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, _, _, _} ->
- Reply
- after 0 ->
- Reply
- end
+ erlang:demonitor(Ref, [flush]),
+ Reply
end
end.
@@ -501,17 +496,6 @@ start_monitor(Node, Name) ->
{Node,erlang:monitor(process, {Name, Node})}
end.
-%% Cancels a monitor started with Ref=erlang:monitor(_, _),
-%% i.e return value {Node, Ref} from start_monitor/2 above.
-unmonitor(Ref) when is_reference(Ref) ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, _, _, _} ->
- true
- after 0 ->
- true
- end.
-
%% Call apply(M,F,A) on all nodes in parallel
-spec multicall(Module, Function, Args) -> {ResL, BadNodes} when
@@ -635,10 +619,10 @@ rec_nodes(Name, [{N,R} | Tail], Badnodes, Replies) ->
rec_nodes(Name, Tail, [N|Badnodes], Replies);
{?NAME, N, {nonexisting_name, _}} ->
%% used by sbcast()
- unmonitor(R),
+ erlang:demonitor(R, [flush]),
rec_nodes(Name, Tail, [N|Badnodes], Replies);
{Name, N, Reply} -> %% Name is bound !!!
- unmonitor(R),
+ erlang:demonitor(R, [flush]),
rec_nodes(Name, Tail, Badnodes, [Reply|Replies])
end.
diff --git a/lib/kernel/test/gen_sctp_SUITE.erl b/lib/kernel/test/gen_sctp_SUITE.erl
index 2a886b2efc..c5d8becfd3 100644
--- a/lib/kernel/test/gen_sctp_SUITE.erl
+++ b/lib/kernel/test/gen_sctp_SUITE.erl
@@ -1399,8 +1399,7 @@ s_req(S, Req) ->
{'DOWN',Mref,_,_,Error} ->
exit(Error);
{S,Mref,Reply} ->
- erlang:demonitor(Mref),
- receive {'DOWN',Mref,_,_,_} -> ok after 0 -> ok end,
+ erlang:demonitor(Mref, [flush]),
Reply
end.
diff --git a/lib/orber/src/orber_iiop_outproxy.erl b/lib/orber/src/orber_iiop_outproxy.erl
index 879af8222d..9c4e603753 100644
--- a/lib/orber/src/orber_iiop_outproxy.erl
+++ b/lib/orber/src/orber_iiop_outproxy.erl
@@ -69,13 +69,8 @@ request(Pid, true, Timeout, Msg, RequestId) ->
gen_server:cast(Pid, {request, Timeout, Msg, RequestId, self(), MRef}),
receive
{MRef, Reply} ->
- erlang:demonitor(MRef),
- receive
- {'DOWN', MRef, _, _, _} ->
- Reply
- after 0 ->
- Reply
- end;
+ erlang:demonitor(MRef, [flush]),
+ Reply;
{'DOWN', MRef, _, Pid, _Reason} when is_pid(Pid) ->
receive
%% Clear EXIT message from queue
@@ -444,13 +439,7 @@ collect_fragments(GIOPHdr1, InBuffer, Bytes, Proxy, RequestId, MRef) ->
%% the reply and send it to the client.
{fragment, #giop_message{byte_order = ByteOrder,
message = Message} = GIOPHdr2, RequestId, MRef} ->
- erlang:demonitor(MRef),
- receive
- {'DOWN', MRef, _, _, _} ->
- ok
- after 0 ->
- ok
- end,
+ erlang:demonitor(MRef, [flush]),
case catch cdr_decode:dec_message_header(null, GIOPHdr2, Message) of
{_, #fragment_header{}, FragBody, _, _} ->
%% This buffer is all the fragments concatenated.
@@ -484,13 +473,8 @@ Unable to decode Reply or LocateReply header",[?LINE, NewGIOP, Error], ?DEBUG_LE
{MRef, {'EXCEPTION', E}} ->
orber:dbg("[~p] orber_iiop:collect_fragments(~p);",
[?LINE, E], ?DEBUG_LEVEL),
- erlang:demonitor(MRef),
- receive
- {'DOWN', MRef, _, _, _} ->
- corba:raise(E)
- after 0 ->
- corba:raise(E)
- end;
+ erlang:demonitor(MRef, [flush]),
+ corba:raise(E);
{'DOWN', MRef, _, Proxy, Reason} when is_pid(Proxy) ->
orber:dbg("[~p] orber_iiop:collect_fragments(~p);~n"
"Monitor generated a DOWN message.",
@@ -511,13 +495,8 @@ clear_queue(Proxy, RequestId, MRef) ->
{MRef, RequestId, cancelled} ->
%% This is the last message that the proxy will send
%% after we've cancelled the request.
- erlang:demonitor(MRef),
- receive
- {'DOWN', MRef, _, _, _} ->
- ok
- after 0 ->
- ok
- end;
+ erlang:demonitor(MRef, [flush]),
+ ok;
{'DOWN', MRef, _, Proxy, _Reason} ->
%% The proxy terminated. Clear EXIT message from queue
receive
diff --git a/lib/runtime_tools/src/dbg.erl b/lib/runtime_tools/src/dbg.erl
index 6e3bfe31c6..6b2fb0460f 100644
--- a/lib/runtime_tools/src/dbg.erl
+++ b/lib/runtime_tools/src/dbg.erl
@@ -551,8 +551,7 @@ c(M, F, A, Flags) ->
stop_clear(),
{error, Reason};
{Pid, Res} ->
- erlang:demonitor(Mref),
- receive {'DOWN', Mref, _, _, _} -> ok after 0 -> ok end,
+ erlang:demonitor(Mref, [flush]),
%% 'sleep' prevents the tracer (recv_all_traces) from
%% receiving garbage {'EXIT',...} when dbg i stopped.
timer:sleep(1),
@@ -592,8 +591,7 @@ req(R) ->
{'DOWN', Mref, _, _, _} -> % If server died
exit(dbg_server_crash);
{dbg, Reply} ->
- erlang:demonitor(Mref),
- receive {'DOWN', Mref, _, _, _} -> ok after 0 -> ok end,
+ erlang:demonitor(Mref, [flush]),
Reply
end.
diff --git a/lib/snmp/src/agent/snmpa_target_cache.erl b/lib/snmp/src/agent/snmpa_target_cache.erl
index 2aa35aa46a..1fcaf82373 100644
--- a/lib/snmp/src/agent/snmpa_target_cache.erl
+++ b/lib/snmp/src/agent/snmpa_target_cache.erl
@@ -21,8 +21,6 @@
-behaviour(gen_server).
%% External exports
-%% Avoid warning for local function demonitor/1 clashing with autoimported BIF.
--compile({no_auto_import,[demonitor/1]}).
-export([start_link/2, stop/0, verbosity/1]).
-export([
@@ -213,21 +211,6 @@ do_init(Prio, Opts) ->
%% requests will have to wait.
%%
-monitor(Pid) -> erlang:monitor(process, Pid).
--ifdef(SNMP_R10).
-demonitor(Ref) ->
- erlang:demonitor(Ref),
- receive
- {_, Ref, _, _, _} ->
- true
- after 0 ->
- true
- end.
--else.
-demonitor(Ref) ->
- erlang:demonitor(Ref, [flush]).
--endif.
-
%% (1) No write_lock active or waiting
handle_call({lock, read = Type, infinity}, {Pid, _} = From,
@@ -236,7 +219,7 @@ handle_call({lock, read = Type, infinity}, {Pid, _} = From,
"entry when no waiting or active writer with"
"~n Pid: ~p"
"~n Cnt: ~p", [Pid, Cnt]),
- MonRef = monitor(Pid),
+ MonRef = erlang:monitor(process, Pid),
Locker = #locker{pid = Pid,
from = From,
mon_ref = MonRef,
@@ -252,7 +235,7 @@ handle_call({lock, read = Type, infinity}, {Pid, _} = From, State) ->
?vlog("lock(read, infinity) -> "
"entry when active or waiting write locks with"
"~n Pid: ~p", [Pid]),
- MonRef = monitor(Pid),
+ MonRef = erlang:monitor(process, Pid),
Locker = #locker{pid = Pid,
from = From,
mon_ref = MonRef,
@@ -273,7 +256,7 @@ handle_call({lock, write = Type, infinity}, {Pid, _} = From,
?vlog("lock(write, infinity) -> "
"entry when no active lockers with"
"~n Pid: ~p", [Pid]),
- MonRef = monitor(Pid),
+ MonRef = erlang:monitor(process, Pid),
Locker = #locker{pid = Pid,
from = From,
mon_ref = MonRef,
@@ -290,7 +273,7 @@ handle_call({lock, write = Type, infinity}, {Pid, _} = From,
?vlog("lock(write, infinity) -> "
"entry when active lockers with"
"~n Pid: ~p", [Pid]),
- MonRef = monitor(Pid),
+ MonRef = erlang:monitor(process, Pid),
Locker = #locker{pid = Pid,
from = From,
mon_ref = MonRef,
@@ -307,7 +290,7 @@ handle_call({lock, write = Type, infinity}, {Pid, _} = From,
#state{writer = true} = State) ->
?vlog("lock(write, infinity) -> entry with"
"~n Pid: ~p", [Pid]),
- MonRef = monitor(Pid),
+ MonRef = erlang:monitor(process, Pid),
Locker = #locker{pid = Pid,
from = From,
mon_ref = MonRef,
@@ -429,7 +412,7 @@ handle_cast({unlock, Pid},
[#locker{mon_ref = MonRef, type = read}] ->
?vdebug("unlock -> found read locker"
"~n MonRef: ~p", [MonRef]),
- demonitor(MonRef),
+ erlang:demonitor(MonRef, [flush]),
ets:delete(?LOCKER_TAB, Pid),
%% ?vtrace("unlock -> done when"
%% "~n Lockers: ~p", [ets:tab2list(?LOCKER_TAB)]),
@@ -437,7 +420,7 @@ handle_cast({unlock, Pid},
[#locker{mon_ref = MonRef, type = write}] ->
?vdebug("unlock -> found write locker"
"~n MonRef: ~p", [MonRef]),
- demonitor(MonRef),
+ erlang:demonitor(MonRef, [flush]),
ets:delete(?LOCKER_TAB, Pid),
%% ?vtrace("unlock -> done when"
%% "~n Lockers: ~p", [ets:tab2list(?LOCKER_TAB)]),
@@ -459,7 +442,7 @@ handle_cast({unlock, Pid},
[#locker{mon_ref = MonRef, type = read}] when (Cnt == 1) ->
?vdebug("unlock -> found read locker"
"~n MonRef: ~p", [MonRef]),
- demonitor(MonRef),
+ erlang:demonitor(MonRef, [flush]),
ets:delete(?LOCKER_TAB, Pid),
case active_waiting_writer(Waiting) of
{true, StillWaiting} ->
@@ -482,7 +465,7 @@ handle_cast({unlock, Pid},
[#locker{mon_ref = MonRef, type = read}] ->
?vdebug("unlock -> found read locker"
"~n MonRef: ~p", [MonRef]),
- demonitor(MonRef),
+ erlang:demonitor(MonRef, [flush]),
ets:delete(?LOCKER_TAB, Pid),
%% ?vtrace("unlock -> done when"
%% "~n Lockers: ~p", [ets:tab2list(?LOCKER_TAB)]),
@@ -492,7 +475,7 @@ handle_cast({unlock, Pid},
%% Release the hord (maybe)
?vdebug("unlock -> found write locker"
"~n MonRef: ~p", [MonRef]),
- demonitor(MonRef),
+ erlang:demonitor(MonRef, [flush]),
ets:delete(?LOCKER_TAB, Pid),
{Active, StillWaiting, Writer} =
activate_waiting_readers_or_maybe_writer(Waiting),
diff --git a/lib/stdlib/src/dets.erl b/lib/stdlib/src/dets.erl
index 45aef0ea80..50812cc532 100644
--- a/lib/stdlib/src/dets.erl
+++ b/lib/stdlib/src/dets.erl
@@ -1246,13 +1246,8 @@ req(Proc, R) ->
{'DOWN', Ref, process, Proc, _Info} ->
badarg;
{Proc, Reply} ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, process, Proc, _Reason} ->
- Reply
- after 0 ->
- Reply
- end
+ erlang:demonitor(Ref, [flush]),
+ Reply
end.
%% Inlined.
diff --git a/lib/stdlib/src/epp.erl b/lib/stdlib/src/epp.erl
index 0a1caa7178..e31cd63f69 100644
--- a/lib/stdlib/src/epp.erl
+++ b/lib/stdlib/src/epp.erl
@@ -1339,8 +1339,7 @@ epp_reply(From, Rep) ->
wait_epp_reply(Epp, Mref) ->
receive
{epp_reply,Epp,Rep} ->
- erlang:demonitor(Mref),
- receive {'DOWN',Mref,_,_,_} -> ok after 0 -> ok end,
+ erlang:demonitor(Mref, [flush]),
Rep;
{'DOWN',Mref,_,_,E} ->
receive {epp_reply,Epp,Rep} -> Rep
diff --git a/lib/stdlib/src/gen_server.erl b/lib/stdlib/src/gen_server.erl
index 9c4b95acf6..30a81ade49 100644
--- a/lib/stdlib/src/gen_server.erl
+++ b/lib/stdlib/src/gen_server.erl
@@ -472,11 +472,11 @@ rec_nodes(Tag, [{N,R}|Tail], Name, Badnodes, Replies, Time, TimerId ) ->
{'DOWN', R, _, _, _} ->
rec_nodes(Tag, Tail, Name, [N|Badnodes], Replies, Time, TimerId);
{{Tag, N}, Reply} -> %% Tag is bound !!!
- unmonitor(R),
+ erlang:demonitor(R, [flush]),
rec_nodes(Tag, Tail, Name, Badnodes,
[{N,Reply}|Replies], Time, TimerId);
{timeout, TimerId, _} ->
- unmonitor(R),
+ erlang:demonitor(R, [flush]),
%% Collect all replies that already have arrived
rec_nodes_rest(Tag, Tail, Name, [N|Badnodes], Replies)
end;
@@ -527,10 +527,10 @@ rec_nodes_rest(Tag, [{N,R}|Tail], Name, Badnodes, Replies) ->
{'DOWN', R, _, _, _} ->
rec_nodes_rest(Tag, Tail, Name, [N|Badnodes], Replies);
{{Tag, N}, Reply} -> %% Tag is bound !!!
- unmonitor(R),
+ erlang:demonitor(R, [flush]),
rec_nodes_rest(Tag, Tail, Name, Badnodes, [{N,Reply}|Replies])
after 0 ->
- unmonitor(R),
+ erlang:demonitor(R, [flush]),
rec_nodes_rest(Tag, Tail, Name, [N|Badnodes], Replies)
end;
rec_nodes_rest(Tag, [N|Tail], Name, Badnodes, Replies) ->
@@ -572,16 +572,6 @@ start_monitor(Node, Name) when is_atom(Node), is_atom(Name) ->
end
end.
-%% Cancels a monitor started with Ref=erlang:monitor(_, _).
-unmonitor(Ref) when is_reference(Ref) ->
- erlang:demonitor(Ref),
- receive
- {'DOWN', Ref, _, _, _} ->
- true
- after 0 ->
- true
- end.
-
%%% ---------------------------------------------------
%%% Message handling functions
%%% ---------------------------------------------------
diff --git a/lib/stdlib/src/io.erl b/lib/stdlib/src/io.erl
index c92e9e3ade..53728237ca 100644
--- a/lib/stdlib/src/io.erl
+++ b/lib/stdlib/src/io.erl
@@ -598,11 +598,7 @@ default_output() ->
wait_io_mon_reply(From, Mref) ->
receive
{io_reply, From, Reply} ->
- erlang:demonitor(Mref),
- receive
- {'DOWN', Mref, _, _, _} -> true
- after 0 -> true
- end,
+ erlang:demonitor(Mref, [flush]),
Reply;
{'EXIT', From, _What} ->
receive
diff --git a/lib/tools/src/fprof.erl b/lib/tools/src/fprof.erl
index 4cbb910f11..877218bda0 100644
--- a/lib/tools/src/fprof.erl
+++ b/lib/tools/src/fprof.erl
@@ -1226,10 +1226,7 @@ spawn_3step(Spawn, FunPrelude, FunAck, FunBody)
MRef = erlang:monitor(process, Parent),
receive
{Parent, Ref, Go} ->
- erlang:demonitor(MRef),
- receive {'DOWN', MRef, _, _, _} -> ok
- after 0 -> ok
- end,
+ erlang:demonitor(MRef, [flush]),
FunBody(Go);
{'DOWN', MRef, _, _, _} ->
ok
@@ -1238,8 +1235,7 @@ spawn_3step(Spawn, FunPrelude, FunAck, FunBody)
MRef = erlang:monitor(process, Child),
receive
{Child, Ref, Ack} ->
- erlang:demonitor(MRef),
- receive {'DOWN', MRef, _, _, _} -> ok after 0 -> ok end,
+ erlang:demonitor(MRef, [flush]),
try FunAck(Ack) of
{Result, Go} ->
catch Child ! {Parent, Ref, Go},