diff options
Diffstat (limited to 'system/doc/design_principles/spec_proc.xml')
| -rw-r--r-- | system/doc/design_principles/spec_proc.xml | 37 |
1 files changed, 14 insertions, 23 deletions
diff --git a/system/doc/design_principles/spec_proc.xml b/system/doc/design_principles/spec_proc.xml index d55427aa10..69bf2e0448 100644 --- a/system/doc/design_principles/spec_proc.xml +++ b/system/doc/design_principles/spec_proc.xml @@ -157,15 +157,15 @@ init(Parent) -> loop(Chs, Parent, Deb) -> receive {From, alloc} -> - Deb2 = sys:handle_debug(Deb, {ch4, write_debug}, + Deb2 = sys:handle_debug(Deb, fun ch4:write_debug/3, ch4, {in, alloc, From}), {Ch, Chs2} = alloc(Chs), From ! {ch4, Ch}, - Deb3 = sys:handle_debug(Deb2, {ch4, write_debug}, + Deb3 = sys:handle_debug(Deb2, fun ch4:write_debug/3, ch4, {out, {ch4, Ch}, From}), loop(Chs2, Parent, Deb3); {free, Ch} -> - Deb2 = sys:handle_debug(Deb, {ch4, write_debug}, + Deb2 = sys:handle_debug(Deb, fun ch4:write_debug/3, ch4, {in, {free, Ch}}), Chs2 = free(Ch, Chs), loop(Chs2, Parent, Deb2); @@ -185,13 +185,8 @@ system_get_state(Chs) -> {ok, Chs}. system_replace_state(StateFun, Chs) -> - try - NChs = StateFun(Chs), - {ok, NChs, NChs} - catch - _:_ -> - {ok, Chs, Chs} - end. + NChs = StateFun(Chs), + {ok, NChs, NChs}. write_debug(Dev, Event, Name) -> io:format(Dev, "~p event = ~p~n", [Name, Event]).</pre> @@ -294,10 +289,10 @@ sys:handle_debug(Deb, Func, Info, Event) => Deb1</code> <p><c>Deb</c> is the debug structure.</p> </item> <item> - <p><c>Func</c> is a tuple <c>{Module, Name}</c> (or a fun) and - should specify a (user defined) function used to format + <p><c>Func</c> is a fun specifying + a (user defined) function used to format trace output. For each system event, the format function is - called as <c>Module:Name(Dev, Event, Info)</c>, where:</p> + called as <c>Func(Dev, Event, Info)</c>, where:</p> <list type="bulleted"> <item> <p><c>Dev</c> is the IO device to which the output should @@ -332,15 +327,15 @@ sys:handle_debug(Deb, Func, Info, Event) => Deb1</code> loop(Chs, Parent, Deb) -> receive {From, alloc} -> - Deb2 = sys:handle_debug(Deb, {ch4, write_debug}, + Deb2 = sys:handle_debug(Deb, fun ch4:write_debug/3, ch4, {in, alloc, From}), {Ch, Chs2} = alloc(Chs), From ! {ch4, Ch}, - Deb3 = sys:handle_debug(Deb2, {ch4, write_debug}, + Deb3 = sys:handle_debug(Deb2, fun ch4:write_debug/3, ch4, {out, {ch4, Ch}, From}), loop(Chs2, Parent, Deb3); {free, Ch} -> - Deb2 = sys:handle_debug(Deb, {ch4, write_debug}, + Deb2 = sys:handle_debug(Deb, fun ch4:write_debug/3, ch4, {in, {free, Ch}}), Chs2 = free(Ch, Chs), loop(Chs2, Parent, Deb2); @@ -409,13 +404,9 @@ system_get_state(Chs) -> {ok, Chs, Chs}. system_replace_state(StateFun, Chs) -> - try - NChs = StateFun(Chs), - {ok, NChs, NChs} - catch - _:_ -> - {ok, Chs, Chs} - end.</code> + NChs = StateFun(Chs), + {ok, NChs, NChs}. +</code> <p>If the special process is set to trap exits, note that if the parent process terminates, the expected behavior is to terminate with the same reason:</p> |