diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/tools/src/lcnt.erl | 107 |
1 files changed, 52 insertions, 55 deletions
diff --git a/lib/tools/src/lcnt.erl b/lib/tools/src/lcnt.erl index 78407a651a..23d66b084e 100644 --- a/lib/tools/src/lcnt.erl +++ b/lib/tools/src/lcnt.erl @@ -23,67 +23,57 @@ -author("Björn-Egil Dahlberg"). %% gen_server callbacks --export([ - init/1, - handle_call/3, - handle_cast/2, - handle_info/2, - terminate/2, - code_change/3 - ]). +-export([init/1, + handle_call/3, + handle_cast/2, + handle_info/2, + terminate/2, + code_change/3]). %% start/stop --export([ - start/0, - stop/0 - ]). +-export([start/0, + stop/0]). %% erts_debug:lock_counters api --export([ - rt_collect/0, - rt_collect/1, - rt_clear/0, - rt_clear/1, - rt_opt/1, - rt_opt/2 - ]). +-export([rt_collect/0, + rt_collect/1, + rt_clear/0, + rt_clear/1, + rt_opt/1, + rt_opt/2]). %% gen_server call api --export([ - raw/0, - collect/0, - collect/1, - clear/0, - clear/1, - conflicts/0, - conflicts/1, - locations/0, - locations/1, - inspect/1, - inspect/2, - histogram/1, - histogram/2, - information/0, - swap_pid_keys/0, - % set options - set/1, - set/2, - - load/1, - save/1 - ]). +-export([raw/0, + collect/0, + collect/1, + clear/0, + clear/1, + conflicts/0, + conflicts/1, + locations/0, + locations/1, + inspect/1, + inspect/2, + histogram/1, + histogram/2, + information/0, + swap_pid_keys/0, + % set options + set/1, + set/2, + + load/1, + save/1]). %% convenience --export([ - apply/3, - apply/2, - apply/1, - all_conflicts/0, - all_conflicts/1, - pid/2, pid/3, - port/1, port/2 - ]). +-export([apply/3, + apply/2, + apply/1, + all_conflicts/0, + all_conflicts/1, + pid/2, pid/3, + port/1, port/2]). -define(version, "1.0"). @@ -135,6 +125,13 @@ start() -> gen_server:start({local, ?MODULE}, ?MODULE, [], []). stop() -> gen_server:call(?MODULE, stop, infinity). init([]) -> {ok, #state{ locks = [], duration = 0 } }. +start_internal() -> + case start() of + {ok,_} -> ok; + {error, {already_started,_}} -> ok; + Error -> Error + end. + %% -------------------------------------------------------------------- %% %% %% API erts_debug:lock_counters @@ -184,7 +181,7 @@ raw() -> call(raw). set(Option, Value) -> call({set, Option, Value}). set({Option, Value}) -> call({set, Option, Value}). save(Filename) -> call({save, Filename}). -load(Filename) -> start(), call({load, Filename}). +load(Filename) -> ok = start_internal(), call({load, Filename}). call(Msg) -> gen_server:call(?MODULE, Msg, infinity). @@ -195,7 +192,7 @@ call(Msg) -> gen_server:call(?MODULE, Msg, infinity). %% -------------------------------------------------------------------- %% apply(M,F,As) when is_atom(M), is_atom(F), is_list(As) -> - lcnt:start(), + ok = start_internal(), Opt = lcnt:rt_opt({copy_save, true}), lcnt:clear(), Res = erlang:apply(M,F,As), @@ -207,7 +204,7 @@ apply(Fun) when is_function(Fun) -> lcnt:apply(Fun, []). apply(Fun, As) when is_function(Fun) -> - lcnt:start(), + ok = start_internal(), Opt = lcnt:rt_opt({copy_save, true}), lcnt:clear(), Res = erlang:apply(Fun, As), |