diff options
Diffstat (limited to 'system')
| -rw-r--r-- | system/doc/design_principles/statem.xml | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/system/doc/design_principles/statem.xml b/system/doc/design_principles/statem.xml index c44f240098..ed6338e306 100644 --- a/system/doc/design_principles/statem.xml +++ b/system/doc/design_principles/statem.xml @@ -93,10 +93,10 @@ State(S) x Event(E) -> Actions(A), State(S')</pre> </p> <list type="bulleted"> <item> - Gathered callback code for each state, + Co-located callback code for each state, regardless of - <seealso marker="#Event Types">Event Types</seealso>. - (such as <em>calls</em>, <em>casts</em> and <em>infos</em>) + <seealso marker="#Event Types">Event Type</seealso> + (such as <em>call</em>, <em>cast</em> and <em>info</em>) </item> <item> <seealso marker="#Postponing Events"> @@ -114,15 +114,14 @@ State(S) x Event(E) -> Actions(A), State(S')</pre> <seealso marker="#State Enter Calls"> State Enter Calls </seealso> - (callback on state entry gathered with the rest + (callback on state entry co-located with the rest of the state callback code) </item> <item> - Higher level timeouts - ( - <seealso marker="#State Time-Outs">State Time-Outs</seealso>, + Easy-to-use timeouts + (<seealso marker="#State Time-Outs">State Time-Outs</seealso>, <seealso marker="#Event Time-Outs">Event Time-Outs</seealso> - or + and <seealso marker="#Generic Time-Outs">Generic Time-outs</seealso> (named time-outs)) </item> @@ -133,14 +132,14 @@ State(S) x Event(E) -> Actions(A), State(S')</pre> <seealso marker="stdlib:gen_server"><c>gen_server</c></seealso>. </p> <p> - For simple state machines not needing these fetures + For simple state machines not needing these features <seealso marker="stdlib:gen_server"><c>gen_server</c></seealso> works just fine. It also has got smaller call overhead, but we are talking about something like 2 vs 3.3 microseconds call roundtrip time here, so if the server callback does just a little bit more than just replying, - or if the callback is not extremely frequent, + or if the call is not extremely frequent, that difference will be hard to notice. </p> </section> @@ -256,7 +255,7 @@ State(S) x Event(E) -> Actions(A), State(S')</pre> With <c>state_functions</c>, you are restricted to use atom-only states, and the <c>gen_statem</c> engine branches depending on state name for you. - This encourages the callback module to gather + This encourages the callback module to co-locate the implementation of all event actions particular to one state in the same place in the code, hence to focus on one state at the time. @@ -1686,7 +1685,7 @@ open(state_timeout, lock, Data) -> It can sometimes be beneficial to be able to generate events to your own state machine. This can be done with the - <seealso marker="#State Transition Action"> + <seealso marker="#State Transition Actions"> State Transition Action </seealso> <c>{next_event,EventType,EventContent}</c>. |