process: use uv_signal instead of ev_signal

node.gyp

@@ -87,6 +87,7 @@
         'src/node_string.cc',
         'src/node_zlib.cc',
         'src/pipe_wrap.cc',
+        'src/signal_wrap.cc',
         'src/stream_wrap.cc',
         'src/slab_allocator.cc',
         'src/tcp_wrap.cc',
@@ -205,7 +206,6 @@
         }, { # POSIX
           'defines': [ '__POSIX__' ],
           'sources': [
-            'src/node_signal_watcher.cc',
             'src/node_io_watcher.cc',
           ],
         }],

src/node.cc

@@ -694,6 +694,10 @@ const char *signo_string(int signo) {
   SIGNO_CASE(SIGTSTP);
 #endif
 
+#ifdef SIGBREAK
+  SIGNO_CASE(SIGBREAK);
+#endif
+
 #ifdef SIGTTIN
   SIGNO_CASE(SIGTTIN);
 #endif

src/node.js

@@ -562,40 +562,47 @@
   startup.processSignalHandlers = function() {
     // Load events module in order to access prototype elements on process like
     // process.addListener.
-    var signalWatchers = {};
+    var signalWraps = {};
     var addListener = process.addListener;
     var removeListener = process.removeListener;
 
     function isSignal(event) {
-      return event.slice(0, 3) === 'SIG' && startup.lazyConstants()[event];
+      return event.slice(0, 3) === 'SIG' &&
+             startup.lazyConstants().hasOwnProperty(event);
     }
 
     // Wrap addListener for the special signal types
     process.on = process.addListener = function(type, listener) {
-      var ret = addListener.apply(this, arguments);
-      if (isSignal(type)) {
-        if (!signalWatchers.hasOwnProperty(type)) {
-          var b = process.binding('signal_watcher');
-          var w = new b.SignalWatcher(startup.lazyConstants()[type]);
-          w.callback = function() { process.emit(type); };
-          signalWatchers[type] = w;
-          w.start();
-
-        } else if (this.listeners(type).length === 1) {
-          signalWatchers[type].start();
+      if (isSignal(type) &&
+          !signalWraps.hasOwnProperty(type)) {
+        var Signal = process.binding('signal_wrap').Signal;
+        var wrap = new Signal();
+
+        wrap.unref();
+
+        wrap.onsignal = function () { process.emit(type); };
+
+        var signum = startup.lazyConstants()[type];
+        var r = wrap.start(signum);
+        if (r) {
+          wrap.close();
+          throw errnoException(errno, "uv_signal_start");
         }
+
+        signalWraps[type] = wrap;
       }
 
-      return ret;
+      return addListener.apply(this, arguments);
     };
 
     process.removeListener = function(type, listener) {
       var ret = removeListener.apply(this, arguments);
       if (isSignal(type)) {
-        assert(signalWatchers.hasOwnProperty(type));
+        assert(signalWraps.hasOwnProperty(type));
 
         if (this.listeners(type).length === 0) {
-          signalWatchers[type].stop();
+          signalWraps[type].close();
+          delete signalWraps[type];
         }
       }
 

src/node_constants.cc

@@ -791,6 +791,10 @@ void DefineConstants(Handle<Object> target) {
   NODE_DEFINE_CONSTANT(target, SIGTSTP);
 #endif
 
+#ifdef SIGBREAK
+  NODE_DEFINE_CONSTANT(target, SIGBREAK);
+#endif
+
 #ifdef SIGTTIN
   NODE_DEFINE_CONSTANT(target, SIGTTIN);
 #endif

src/node_extensions.h

@@ -29,9 +29,6 @@ NODE_EXT_LIST_ITEM(node_crypto)
 NODE_EXT_LIST_ITEM(node_evals)
 NODE_EXT_LIST_ITEM(node_fs)
 NODE_EXT_LIST_ITEM(node_http_parser)
-#ifdef __POSIX__
-NODE_EXT_LIST_ITEM(node_signal_watcher)
-#endif
 NODE_EXT_LIST_ITEM(node_os)
 NODE_EXT_LIST_ITEM(node_zlib)
 
@@ -44,6 +41,7 @@ NODE_EXT_LIST_ITEM(node_cares_wrap)
 NODE_EXT_LIST_ITEM(node_tty_wrap)
 NODE_EXT_LIST_ITEM(node_process_wrap)
 NODE_EXT_LIST_ITEM(node_fs_event_wrap)
+NODE_EXT_LIST_ITEM(node_signal_wrap)
 
 NODE_EXT_LIST_END
 

src/signal_wrap.cc

@@ -0,0 +1,132 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#include "node.h"
+#include "handle_wrap.h"
+
+
+namespace node {
+
+using v8::Object;
+using v8::Handle;
+using v8::Local;
+using v8::Persistent;
+using v8::Value;
+using v8::HandleScope;
+using v8::FunctionTemplate;
+using v8::String;
+using v8::Function;
+using v8::TryCatch;
+using v8::Context;
+using v8::Arguments;
+using v8::Integer;
+
+static Persistent<String> onsignal_sym;
+
+
+class SignalWrap : public HandleWrap {
+ public:
+  static void Initialize(Handle<Object> target) {
+    HandleScope scope;
+
+    HandleWrap::Initialize(target);
+
+    Local<FunctionTemplate> constructor = FunctionTemplate::New(New);
+    constructor->InstanceTemplate()->SetInternalFieldCount(1);
+    constructor->SetClassName(String::NewSymbol("Signal"));
+
+    NODE_SET_PROTOTYPE_METHOD(constructor, "close", HandleWrap::Close);
+    NODE_SET_PROTOTYPE_METHOD(constructor, "ref", HandleWrap::Ref);
+    NODE_SET_PROTOTYPE_METHOD(constructor, "unref", HandleWrap::Unref);
+    NODE_SET_PROTOTYPE_METHOD(constructor, "start", Start);
+    NODE_SET_PROTOTYPE_METHOD(constructor, "stop", Stop);
+
+    onsignal_sym = NODE_PSYMBOL("onsignal");
+
+    target->Set(String::NewSymbol("Signal"), constructor->GetFunction());
+  }
+
+ private:
+  static Handle<Value> New(const Arguments& args) {
+    // This constructor should not be exposed to public javascript.
+    // Therefore we assert that we are not trying to call this as a
+    // normal function.
+    assert(args.IsConstructCall());
+
+    HandleScope scope;
+    SignalWrap* wrap = new SignalWrap(args.This());
+
+    return scope.Close(args.This());
+  }
+
+  SignalWrap(Handle<Object> object)
+      : HandleWrap(object, reinterpret_cast<uv_handle_t*>(&handle_)) {
+    int r = uv_signal_init(uv_default_loop(), &handle_);
+    assert(r == 0);
+  }
+
+  ~SignalWrap() {
+  }
+
+  static Handle<Value> Start(const Arguments& args) {
+    HandleScope scope;
+
+    UNWRAP(SignalWrap)
+
+    int signum = args[0]->Int32Value();
+
+    int r = uv_signal_start(&wrap->handle_, OnSignal, signum);
+
+    if (r) SetErrno(uv_last_error(uv_default_loop()));
+
+    return scope.Close(Integer::New(r));
+  }
+
+  static Handle<Value> Stop(const Arguments& args) {
+    HandleScope scope;
+
+    UNWRAP(SignalWrap)
+
+    int r = uv_signal_stop(&wrap->handle_);
+
+    if (r) SetErrno(uv_last_error(uv_default_loop()));
+
+    return scope.Close(Integer::New(r));
+  }
+
+  static void OnSignal(uv_signal_t* handle, int signum) {
+    HandleScope scope;
+
+    SignalWrap* wrap = container_of(handle, SignalWrap, handle_);
+    assert(wrap);
+
+    Local<Value> argv[1] = { Integer::New(signum) };
+    MakeCallback(wrap->object_, onsignal_sym, ARRAY_SIZE(argv), argv);
+  }
+
+  uv_signal_t handle_;
+};
+
+
+}  // namespace node
+
+
+NODE_MODULE(node_signal_wrap, node::SignalWrap::Initialize)