June 2018 Update

Task/Handle-a-signal/D/handle-a-signal.d

@@ -0,0 +1,29 @@
+import core.stdc.signal;
+import core.thread;
+import std.concurrency;
+import std.datetime.stopwatch;
+import std.stdio;
+
+__gshared int gotint = 0;
+extern(C) void handleSigint(int sig) nothrow @nogc @system {
+    /*
+     * Signal safety: It is not safe to call clock(), printf(),
+     * or exit() inside a signal handler. Instead, we set a flag.
+     */
+    gotint = 1;
+}
+
+void main() {
+    auto sw = StopWatch(AutoStart.yes);
+    signal(SIGINT, &handleSigint);
+    for (int i=0; !gotint;) {
+        Thread.sleep(500_000.usecs);
+        if (gotint) {
+            break;
+        }
+        writeln(++i);
+    }
+    sw.stop();
+    auto td = sw.peek();
+    writeln("Program has run for ", td);
+}