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Unified Diff: runtime/bin/process_patch.dart

Issue 108003009: Signal handling. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Nicer API and Android+Mac versions. Created 7 years ago
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Index: runtime/bin/process_patch.dart
diff --git a/runtime/bin/process_patch.dart b/runtime/bin/process_patch.dart
index e0e8fc6e237d21c632eb4158506f848ec3c7d11d..b83ec1b60114c10cee1aa3ef05972e036e39937d 100644
--- a/runtime/bin/process_patch.dart
+++ b/runtime/bin/process_patch.dart
@@ -71,12 +71,77 @@ patch class Process {
}
+List<_SignalController> _signalControllers = new List(32);
+
+
+class _SignalController {
+ final ProcessSignal signal;
+
+ StreamController _controller;
+ var _id;
+
+ _SignalController(this.signal) {
+ _controller = new StreamController.broadcast(
+ onListen: _listen,
+ onCancel: _cancel);
+ }
+
+ Stream<ProcessSignal> get stream => _controller.stream;
+
+ void _listen() {
+ var id = _setSignalHandler(signal._signalNumber);
+ if (id is! int) {
+ _controller.addError(
+ new SignalException("Failed to listen for $signal", id));
+ return;
+ }
+ _id = id;
+ var socket = new _RawSocket(new _NativeSocket.watch(id));
+ socket.listen((event) {
+ if (event == RawSocketEvent.READ) {
+ var bytes = socket.read();
+ for (int i = 0; i < bytes.length; i++) {
+ _controller.add(signal);
+ }
+ }
+ });
+ }
+
+ void _cancel() {
+ if (_id != null) {
+ _clearSignalHandler(signal._signalNumber);
+ _id = null;
+ }
+ }
+
+ /* patch */ static int _setSignalHandler(int signal)
+ native "Process_SetSignalHandler";
+ /* patch */ static int _clearSignalHandler(int signal)
+ native "Process_ClearSignalHandler";
+}
+
+
patch class _ProcessUtils {
/* patch */ static void _exit(int status) native "Process_Exit";
/* patch */ static void _setExitCode(int status)
native "Process_SetExitCode";
/* patch */ static void _sleep(int millis) native "Process_Sleep";
/* patch */ static int _pid(Process process) native "Process_Pid";
+ /* patch */ static Stream<ProcessSignal> _watchSignal(ProcessSignal signal) {
+ if (signal != ProcessSignal.SIGHUP &&
+ signal != ProcessSignal.SIGINT &&
+ (Platform.isWindows ||
+ (signal != ProcessSignal.SIGUSR1 &&
+ signal != ProcessSignal.SIGUSR2 &&
+ signal != ProcessSignal.SIGWINCH))) {
+ throw new SignalException(
+ "Listening for signal $signal is not supported");
+ }
+ if (_signalControllers[signal._signalNumber] == null) {
+ _signalControllers[signal._signalNumber] = new _SignalController(signal);
+ }
+ return _signalControllers[signal._signalNumber].stream;
+ }
}
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