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-rw-r--r--lib/stdlib/doc/src/gen_statem.xml36
-rw-r--r--lib/stdlib/src/gen_statem.erl10
2 files changed, 28 insertions, 18 deletions
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml
index db6a4e03ea..4489ddfb91 100644
--- a/lib/stdlib/doc/src/gen_statem.xml
+++ b/lib/stdlib/doc/src/gen_statem.xml
@@ -155,7 +155,7 @@ erlang:'!' -----> Module:StateName/3
<p>
Inserting an event replaces the trick of calling your own
state handling functions that you often would have to
- resort to in e.g <seealso marker="gen_fsm">gen_fsm</seealso>
+ resort to in for example <seealso marker="gen_fsm">gen_fsm</seealso>
to force processing an inserted event before others.
If you for example in <c>gen_statem</c> postpone an event
in one state and then call some other state function of yours,
@@ -529,17 +529,16 @@ ok
all other events.
</item>
<item>
- If a
- <seealso marker="#type-state_timeout">
- <em><c>state_timeout()</c></em>
+ If an
+ <seealso marker="#type-event_timeout">
+ <em><c>event_timeout()</c></em>
</seealso>
is set through
<seealso marker="#type-action">
<c>action() timeout</c>
</seealso>
- a state timer may be started or a timeout zero event
- may be enqueued as the newest incoming, that is the last
- to process before going into <c>receive</c> for new events.
+ an event timer may be started or a timeout zero event
+ may be enqueued.
</item>
<item>
The (possibly new)
@@ -588,7 +587,7 @@ ok
</desc>
</datatype>
<datatype>
- <name name="state_timeout" />
+ <name name="event_timeout" />
<desc>
<p>
Generate an event of
@@ -600,7 +599,8 @@ ok
If the value is <c>infinity</c> no timer is started.
If it is <c>0</c> the timeout event
is immediately enqueued as the newest received
- (unless there are retried or inserted events to process).
+ (unless there are retried or inserted events to process
+ since then the timeout is cancelled).
Also note that it is not possible nor needed
to cancel this timeout since it is cancelled automatically
by any other event.
@@ -653,15 +653,25 @@ ok
</seealso>
for this state transition.
</item>
+ <tag><c>Timeout</c></tag>
+ <item>
+ Short for <c>{timeout,Timeout}</c> that is
+ the timeout message is the timeout time.
+ This form exists to make the
+ <seealso marker="#state_function">state function</seealso>
+ return value <c>{next_state,NextState,NewData,Timeout}</c>
+ allowed like for
+ <seealso marker="gen_fsm#Module:StateName/2">
+ gen_fsm Module:StateName/2</seealso>.
+ </item>
<tag><c>timeout</c></tag>
<item>
Set the
<seealso marker="#type-transition_option">
- <c>transition_option() state_timeout()</c>
+ <c>transition_option() event_timeout()</c>
</seealso>
to <c><anno>Time</anno></c> with the
- <c>EventContent</c> as <c><anno>Msg</anno></c>
- for the next state.
+ <c>EventContent</c> as <c><anno>Msg</anno></c>.
</item>
<tag><c>reply_action()</c></tag>
<item>Reply to a caller.</item>
@@ -1419,7 +1429,7 @@ ok
<p>
This function is called by a <c>gen_statem</c> when it should
update its internal state during a release upgrade/downgrade,
- i.e. when the instruction <c>{update,Module,Change,...}</c>
+ that is when the instruction <c>{update,Module,Change,...}</c>
where <c>Change={advanced,Extra}</c> is given in
the <c>appup</c> file. See
<seealso marker="doc/design_principles:release_handling#instr">
diff --git a/lib/stdlib/src/gen_statem.erl b/lib/stdlib/src/gen_statem.erl
index 438c366f8e..92e26bd7ed 100644
--- a/lib/stdlib/src/gen_statem.erl
+++ b/lib/stdlib/src/gen_statem.erl
@@ -77,7 +77,7 @@
-type callback_mode() :: 'state_functions' | 'handle_event_function'.
-type transition_option() ::
- postpone() | hibernate() | state_timeout().
+ postpone() | hibernate() | event_timeout().
-type postpone() ::
%% If 'true' postpone the current event
%% and retry it when the state changes (=/=)
@@ -85,7 +85,7 @@
-type hibernate() ::
%% If 'true' hibernate the server instead of going into receive
boolean().
--type state_timeout() ::
+-type event_timeout() ::
%% Generate a ('timeout', Msg, ...) event after Time
%% unless some other event is delivered
Time :: timeout().
@@ -111,9 +111,9 @@
'hibernate' | % Set the hibernate option
{'hibernate', Hibernate :: hibernate()} |
%%
- (Timeout :: state_timeout()) | % {timeout,Timeout}
- {'timeout', % Set the timeout option
- Time :: state_timeout(), Msg :: term()} |
+ (Timeout :: event_timeout()) | % {timeout,Timeout}
+ {'timeout', % Set the event timeout option
+ Time :: event_timeout(), Msg :: term()} |
%%
reply_action() |
%%