diff options
Diffstat (limited to 'lib/kernel/src/application.erl')
| -rw-r--r-- | lib/kernel/src/application.erl | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/lib/kernel/src/application.erl b/lib/kernel/src/application.erl index c299fb085c..5dd6b73857 100644 --- a/lib/kernel/src/application.erl +++ b/lib/kernel/src/application.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2011. All Rights Reserved. +%% Copyright Ericsson AB 1996-2013. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -22,8 +22,9 @@ load/1, load/2, unload/1, takeover/2, which_applications/0, which_applications/1, loaded_applications/0, permit/2]). +-export([ensure_started/1, ensure_started/2]). -export([set_env/3, set_env/4, unset_env/2, unset_env/3]). --export([get_env/1, get_env/2, get_all_env/0, get_all_env/1]). +-export([get_env/1, get_env/2, get_env/3, get_all_env/0, get_all_env/1]). -export([get_key/1, get_key/2, get_all_key/0, get_all_key/1]). -export([get_application/0, get_application/1, info/0]). -export([start_type/0]). @@ -37,8 +38,7 @@ -type application_opt() :: {'description', Description :: string()} | {'vsn', Vsn :: string()} | {'id', Id :: string()} - | {'modules', [(Module :: module()) | - {Module :: module(), Version :: term()}]} + | {'modules', [Module :: module()]} | {'registered', Names :: [Name :: atom()]} | {'applications', [Application :: atom()]} | {'included_applications', [Application :: atom()]} @@ -136,6 +136,28 @@ start(Application, RestartType) -> Error end. +-spec ensure_started(Application) -> 'ok' | {'error', Reason} when + Application :: atom(), + Reason :: term(). + +ensure_started(Application) -> + ensure_started(Application, temporary). + +-spec ensure_started(Application, Type) -> 'ok' | {'error', Reason} when + Application :: atom(), + Type :: restart_type(), + Reason :: term(). + +ensure_started(Application, RestartType) -> + case start(Application, RestartType) of + ok -> + ok; + {error, {already_started, Application}} -> + ok; + Error -> + Error + end. + -spec start_boot(Application :: atom()) -> 'ok' | {'error', term()}. start_boot(Application) -> @@ -265,6 +287,20 @@ get_env(Key) -> get_env(Application, Key) -> application_controller:get_env(Application, Key). +-spec get_env(Application, Par, Def) -> Val when + Application :: atom(), + Par :: atom(), + Def :: term(), + Val :: term(). + +get_env(Application, Key, Def) -> + case get_env(Application, Key) of + {ok, Val} -> + Val; + undefined -> + Def + end. + -spec get_all_env() -> Env when Env :: [{Par :: atom(), Val :: term()}]. |