diff options
Diffstat (limited to 'lib/sasl/src/systools_rc.erl')
| -rw-r--r-- | lib/sasl/src/systools_rc.erl | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/lib/sasl/src/systools_rc.erl b/lib/sasl/src/systools_rc.erl index daadb79967..c16f6aa845 100644 --- a/lib/sasl/src/systools_rc.erl +++ b/lib/sasl/src/systools_rc.erl @@ -54,6 +54,7 @@ %% {sync_nodes, Id, Nodes} %% {apply, {M, F, A}} %% restart_new_emulator +%% restart_emulator %%----------------------------------------------------------------- %% High-level instructions that contain dependencies @@ -144,7 +145,10 @@ translate_merged_script(Mode, Script, Appls, PreAppls) -> {Before2, After2} = translate_dependent_instrs(Mode, Before1, After1, Appls), Before3 = merge_load_object_code(Before2), - NewScript = Before3 ++ [point_of_no_return | After2], + + {Before4,After4} = sort_emulator_restart(Mode,Before3,After2), + NewScript = Before4 ++ [point_of_no_return | After4], + check_syntax(NewScript), {ok, NewScript}. @@ -699,6 +703,39 @@ mlo([{load_object_code, {Lib, LibVsn, Mods}} | T]) -> mlo([]) -> []. %%----------------------------------------------------------------- +%% RESTART EMULATOR +%% ----------------------------------------------------------------- +%% ----------------------------------------------------------------- +%% Check if there are any 'restart_new_emulator' instructions (i.e. if +%% the emulator or core application version is changed). If so, this +%% must be done first for upgrade and last for downgrade. +%% Check if there are any 'restart_emulator' instructions, if so +%% remove all and place one the end. +%% ----------------------------------------------------------------- +sort_emulator_restart(Mode,Before,After) -> + {Before1,After1} = + case filter_out(restart_new_emulator, After) of + After -> + {Before,After}; + A1 when Mode==up -> + {[restart_new_emulator|Before],A1}; + A1 when Mode==dn -> + {Before,A1++[restart_emulator]} + end, + After2 = + case filter_out(restart_emulator, After1) of + After1 -> + After1; + A2 -> + A2++[restart_emulator] + end, + {Before1,After2}. + + +filter_out(What,List) -> + lists:filter(fun(X) when X=:=What -> false; (_) -> true end, List). + +%%----------------------------------------------------------------- %% SYNTAX CHECK %%----------------------------------------------------------------- %%----------------------------------------------------------------- @@ -817,6 +854,7 @@ check_op({apply, {M, F, A}}) -> check_func(F), check_args(A); check_op(restart_new_emulator) -> ok; +check_op(restart_emulator) -> ok; check_op(X) -> throw({error, {bad_instruction, X}}). check_mod(Mod) when is_atom(Mod) -> ok; |