aboutsummaryrefslogtreecommitdiffstats
path: root/lib/dialyzer/test/race_SUITE_data/src/ets_insert_double1.erl
diff options
context:
space:
mode:
Diffstat (limited to 'lib/dialyzer/test/race_SUITE_data/src/ets_insert_double1.erl')
-rw-r--r--lib/dialyzer/test/race_SUITE_data/src/ets_insert_double1.erl28
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/dialyzer/test/race_SUITE_data/src/ets_insert_double1.erl b/lib/dialyzer/test/race_SUITE_data/src/ets_insert_double1.erl
new file mode 100644
index 0000000000..d5b6689eb1
--- /dev/null
+++ b/lib/dialyzer/test/race_SUITE_data/src/ets_insert_double1.erl
@@ -0,0 +1,28 @@
+%% This tests the presence of possible races due to an ets:lookup/ets:insert
+%% combination. It takes into account multiple ets:inserts that might exist.
+
+-module(ets_insert_double1).
+-export([start/0]).
+
+start() ->
+ io:format("Created ~w\n", [ets:new(foo, [named_table, public])]),
+ ets:insert(foo, {random, random:uniform(150)}),
+ io:format("Inserted ~w\n", [{_, N}] = ets:lookup(foo, random)),
+ case (N rem 2 == 0) of
+ true ->
+ io:format("\nInserted an even integer\n", []),
+ io:format("\nWill make it odd and generate new password\n", []),
+ ets:insert(foo, [{random, N+1}, {pass, generate_password(N)}]);
+ false ->
+ io:format("\nInserted an odd integer\n", []),
+ io:format("\nWill make it even and generate new password\n", []),
+ ets:insert(foo, [{random, N+1}, {pass, generate_password(N)}])
+ end,
+ io:format("Update complete\n", []),
+ ObjectList = ets:lookup(foo, pass),
+ io:format("New password: ~w\n", [ObjectList]),
+ ets:insert(foo, {pass, 'empty'}).
+
+generate_password(N) ->
+ [{_, P}] = ets:lookup(foo, pass),
+ lists:map(fun (_) -> random:uniform(90)+P+$\s+1 end, lists:seq(1,N)).