diff options
Diffstat (limited to 'lib/stdlib/doc')
| -rw-r--r-- | lib/stdlib/doc/src/gen_statem.xml | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml index 35b842c173..4af6732e7c 100644 --- a/lib/stdlib/doc/src/gen_statem.xml +++ b/lib/stdlib/doc/src/gen_statem.xml @@ -374,7 +374,7 @@ erlang:'!' -----> Module:StateName/3 When used in the <seealso marker="#type-action">action()</seealso> <c>{remove_event,RemoveEventPredicate}</c>, - the event for which the predicate returns <c>true</c> + the oldest event for which the predicate returns <c>true</c> will be removed. </p> <p> @@ -442,6 +442,14 @@ erlang:'!' -----> Module:StateName/3 is reset to start with the oldest postponed. </item> <item> + All events inserted with + <seealso marker="#type-action"> + <c>action() next_event</c> + </seealso> + are inserted in the queue to be processed before + all other events. + </item> + <item> If the <seealso marker="#type-postpone"> <c>transition_option()</c> @@ -450,7 +458,8 @@ erlang:'!' -----> Module:StateName/3 <c>timeout</c> </seealso> is set a state timer may be started or a timeout zero event - may be enqueued as the newest incoming. + may be enqueued as the newest incoming that is the last + to process before going into <c>receive</c> for new events. </item> <item> The (possibly new) @@ -582,16 +591,16 @@ erlang:'!' -----> Module:StateName/3 and <c><anno>EventContent</anno></c> as the next to process. This will bypass any events in the process mailbox as well as any other queued events. + All <c>next_event</c> actions + in the containing list are buffered and inserted + after the actions have been done + so the first in the list will be the first to process. An event of type <seealso marker="#type-event_type"> <c>internal</c> </seealso> should be used when you want to reliably distinguish an event inserted this way from any external event. - If there are multiple <c>next_event</c> actions - in the containing list they are buffered and all are - inserted so the first in the list will be the - first to process. </item> <tag><c>remove_event</c></tag> <item> @@ -599,7 +608,11 @@ erlang:'!' -----> Module:StateName/3 that matches equal to <c><anno>EventType</anno></c> and <c><anno>EventContent</anno></c> or for which <c><anno>EventPredicate</anno></c> - returns <c>true</c>. + returns <c>true</c>. Note that <c>next_event</c> + and <c>postpone</c> events in the same actions list + does not get into the event queue until after all actions + has been done so you can not remove an event that you insert + in the same actions list. Make up your mind! </item> <tag><c>cancel_timer</c></tag> <item> |