diff options
Diffstat (limited to 'lib/percept/src/percept_db.erl')
| -rw-r--r-- | lib/percept/src/percept_db.erl | 49 |
1 files changed, 40 insertions, 9 deletions
diff --git a/lib/percept/src/percept_db.erl b/lib/percept/src/percept_db.erl index edb0d79a29..52e9afb78f 100644 --- a/lib/percept/src/percept_db.erl +++ b/lib/percept/src/percept_db.erl @@ -33,7 +33,7 @@ ]). -include("percept.hrl"). - +-define(STOP_TIMEOUT, 1000). %%========================================================================== %% %% Type definitions @@ -77,17 +77,32 @@ start() -> case erlang:whereis(percept_db) of undefined -> - Pid = spawn( fun() -> init_percept_db() end), - erlang:register(percept_db, Pid), - {started, Pid}; + {started, do_start()}; PerceptDB -> - erlang:unregister(percept_db), - PerceptDB ! {action, stop}, - Pid = spawn( fun() -> init_percept_db() end), - erlang:register(percept_db, Pid), - {restarted, Pid} + {restarted, restart(PerceptDB)} end. +%% @spec restart(pid()) -> pid() +%% @private +%% @doc restarts the percept database. + +-spec restart(pid())-> pid(). + +restart(PerceptDB)-> + stop_sync(PerceptDB), + do_start(). + +%% @spec do_start(pid()) -> pid() +%% @private +%% @doc starts the percept database. + +-spec do_start()-> pid(). + +do_start()-> + Pid = spawn( fun() -> init_percept_db() end), + erlang:register(percept_db, Pid), + Pid. + %% @spec stop() -> not_started | {stopped, Pid} %% Pid = pid() %% @doc Stops the percept database. @@ -103,6 +118,22 @@ stop() -> {stopped, Pid} end. +%% @spec stop_sync(pid()) -> true +%% @private +%% @doc Stops the percept database, with a synchronous call. + +-spec stop_sync(pid())-> true. + +stop_sync(Pid)-> + MonitorRef = erlang:monitor(process, Pid), + stop(), + receive + {'DOWN', MonitorRef, _Type, Pid, _Info}-> + true + after ?STOP_TIMEOUT-> + exit(Pid, kill) + end. + %% @spec insert(tuple()) -> ok %% @doc Inserts a trace or profile message to the database. |