lib: intro module to manage C signals

[nit.git] / tests / test_signals.nit

diff --git a/tests/test_signals.nit b/tests/test_signals.nit
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+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2012 Alexis Laferrière <alexis.laf@xymus.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+module test_signals
+
+import signals
+
+class MyReceiver
+       super SignalHandler
+
+       redef fun receive_signal( signal ) do print "received safely {signal}"
+       redef fun receive_signal_unsafe( signal ) do print "received unsafely {signal}"
+end
+
+class MyAlarmReceiver
+       super SignalHandler
+
+       init do handle_signal( sigalarm, true )
+
+       redef fun receive_signal( signal )
+       do
+               if signal == sigalarm then print "alarm!"
+       end
+end
+
+var r = new MyReceiver
+r.handle_signal( r.sigint, true ) # will call back when "check_signals" is called
+r.handle_signal( r.sigsegv, false ) # the only way to receive a sigsegv
+
+var ar = new MyAlarmReceiver
+set_alarm( 1 ) # calls C "alarm()"
+
+loop
+       var hit = check_signals # callbacks are amde here
+       if hit then break
+end