all tasks

Task/Synchronous-concurrency/D/synchronous-concurrency.d

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+import tools.threads, std.stdio, std.stream, std.thread;
+
+void main() {
+  // line or EOF
+  struct InputLine {
+    string data;
+    bool eof;
+    static InputLine opCall(string s) { InputLine res; res.data = s; return res; }
+    static InputLine EOF() { InputLine res; res.eof = true; return res; }
+  }
+  auto LineCh = new MessageChannel!(InputLine),
+    ResultCh = new MessageChannel!(int);
+  auto printer = new Thread({
+    int count;
+    while (true) {
+      auto line = LineCh.get();
+      if (line.eof) break;
+      count ++;
+      writefln(count, ": ", line.data);
+    }
+    ResultCh.put(count);
+    return 0;
+  });
+  printer.start;
+  auto file = new File("input.txt");
+  while (!file.eof()) {
+    auto line = file.readLine();
+    LineCh.put(InputLine(line));
+  }
+  LineCh.put(InputLine.EOF());
+  writefln("Count: ", ResultCh.get());
+}