diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/stdlib/doc/src/gen_statem.xml | 36 | ||||
| -rw-r--r-- | lib/stdlib/src/gen_statem.erl | 10 |
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() | %% |