draft

Author: romgrk

examples/editor.js

@@ -153,6 +153,7 @@ const execute = function(command) {
 
 
 textView.on('key-press-event', function(event) {
+    Gdk.test_error()
     let keyname = Gdk.keyvalName(event.keyval);
     let label = Gtk.acceleratorGetLabel(event.keyval, event.state);
 

src/closure.cc

@@ -1,5 +1,5 @@
 #include <glib.h>
-#include <nan.h>
+// #include <nan.h>
 
 #include "debug.h"
 #include "function.h"
@@ -13,9 +13,10 @@ namespace GNodeJS {
 struct Closure {
     GClosure base;
     Persistent<Function> persistent;
-    GISignalInfo* info;
+    GIBaseInfo* info;
 
     ~Closure() {
+        persistent.Reset();
         if (info)
             g_base_info_unref(info);
     }
@@ -40,7 +41,7 @@ void Closure::Marshal(GClosure *base,
     HandleScope scope(isolate);
     Local<Context> context = Context::New(isolate);
     Context::Scope context_scope(context);
-    Nan::TryCatch try_catch;
+    // Nan::TryCatch try_catch;
 
     Local<Function> func = Local<Function>::New(isolate, closure->persistent);
 
@@ -78,12 +79,14 @@ void Closure::Marshal(GClosure *base,
         }
     }
     else {
-        auto stackTrace = try_catch.StackTrace();
-        if (!stackTrace.IsEmpty())
-            printf("%s\n", *Nan::Utf8String(stackTrace.ToLocalChecked()));
-        else
-            printf("%s\n", *Nan::Utf8String(try_catch.Exception()));
-        exit(1);
+        log("did throw");
+        /* auto stackTrace = try_catch.StackTrace();
+         * if (!stackTrace.IsEmpty())
+         *     printf("%s\n", *Nan::Utf8String(stackTrace.ToLocalChecked()));
+         * else
+         *     printf("%s\n", *Nan::Utf8String(try_catch.Exception()));
+         * exit(1);  */
+        // try_catch.ReThrow();
     }
 
     #ifndef __linux__
@@ -96,7 +99,7 @@ void Closure::Invalidated(gpointer data, GClosure *base) {
     closure->~Closure();
 }
 
-GClosure *MakeClosure(Isolate *isolate, Local<Function> function, GISignalInfo* info) {
+GClosure *MakeClosure(Isolate *isolate, Local<Function> function, GIBaseInfo* info) {
     Closure *closure = (Closure *) g_closure_new_simple (sizeof (*closure), NULL);
     closure->persistent.Reset(isolate, function);
     closure->info = info;

src/loop.cc

@@ -1,73 +1,93 @@
+/*
+ * Taken from https://github.com/endlessm/eos-knowledge-content-node/blob/master/src/mainloop.cc
+ * Relicensed in https://github.com/Place1/node-gir/issues/24
+ */
+
 #include <glib.h>
 #include <uv.h>
 
 #include "loop.h"
 #include "util.h"
 
-/* Integration for the GLib main loop and uv's main loop */
-
-/* The way that this works is that we take uv's loop and nest it inside GLib's
- * mainloop, since nesting GLib inside uv seems to be fairly impossible until
- * either uv allows external sources to drive prepare/check, or until GLib
- * exposes an epoll fd to wait on... */
+using namespace v8;
 
 namespace GNodeJS {
 
-struct uv_loop_source {
-    GSource source;
-    uv_loop_t *loop;
+struct ThreadData {
+    uv_thread_t thread_handle;
+    uv_mutex_t mutex_handle;
+    uv_async_t async_handle;
+    GPollFD *fds;
+    gint nfds;
 };
 
-static gboolean uv_loop_source_prepare (GSource *base, int *timeout) {
-    struct uv_loop_source *source = (struct uv_loop_source *) base;
-    uv_update_time (source->loop);
+/*
+ * GLibs mainloop is not easy to embed directly right now. So rather then
+ * embedding glib's mainloop inside libuvs mainloop, we are running glibs
+ * mainloop in a separate thread. However we still want to be able to callback
+ * into v8 javascript context from glib async code, so we call the dispatch
+ * phase of glibs mainloop back on libuvs main thread. The flow is something
+ * like
+ *
+ * glib thread: poll for events
+ * glib thread: got events. wakeup libuv thread and lock
+ * libuv thread: dispatch glib events
+ * libuv thread: unlock glib thread
+ * glib thread: poll for events
+ * ...
+ *
+ * If in the future glib moves to epoll to drive its mainloop, we could easily
+ * embed it inside of libuvs mainloop on the same thread, by polling on a single
+ * fd. See https://bugzilla.gnome.org/show_bug.cgi?id=156048
+ */
+static void DispatchGLibMainloop (uv_async_t *async_handle) {
+    ThreadData *data = (ThreadData *)async_handle->data;
+    GMainContext *context = g_main_context_default ();
+    g_main_context_acquire (context);
+    g_main_context_dispatch (context);
+    g_main_context_release (context);
+    uv_mutex_unlock (&data->mutex_handle);
+}
 
-    bool loop_alive = uv_loop_alive (source->loop);
+static void IterateGLibMainloop (ThreadData *data) {
+    GMainContext *context = g_main_context_default ();
+    gint max_priority, timeout;
+    g_main_context_prepare (context, &max_priority);
 
-    /* If the loop is dead, we can simply sleep forever until a GTK+ source
-     * (presumably) wakes us back up again. */
-    if (!loop_alive)
-        return FALSE;
+    gint nfds;
+    while ((nfds = g_main_context_query (context, max_priority, &timeout, data->fds, data->nfds)) > data->nfds) {
+        delete[] data->fds;
+        data->fds = new GPollFD[nfds];
+        data->nfds = nfds;
+    }
 
-    /* Otherwise, check the timeout. If the timeout is 0, that means we're
-     * ready to go. Otherwise, keep sleeping until the timeout happens again. */
-    int t = uv_backend_timeout (source->loop);
-    *timeout = t;
+    g_poll (data->fds, data->nfds, timeout);
 
-    if (t == 0)
-        return TRUE;
-    else
-        return FALSE;
-}
+    gboolean some_ready = g_main_context_check (context, max_priority, data->fds, data->nfds);
 
-static gboolean uv_loop_source_dispatch (GSource *base, GSourceFunc callback, gpointer user_data) {
-    struct uv_loop_source *source = (struct uv_loop_source *) base;
-    uv_run (source->loop, UV_RUN_NOWAIT);
-    Util::CallNextTickCallback();
-    return G_SOURCE_CONTINUE;
+    if (some_ready) {
+        g_main_context_release (context);
+        uv_async_send(&data->async_handle);
+        uv_mutex_lock (&data->mutex_handle);
+        g_main_context_acquire (context);
+    }
 }
 
-static GSourceFuncs uv_loop_source_funcs = {
-    uv_loop_source_prepare,
-    NULL,
-    uv_loop_source_dispatch,
-    NULL,
-
-    NULL, NULL,
-};
-
-static GSource *uv_loop_source_new (uv_loop_t *loop) {
-    struct uv_loop_source *source = (struct uv_loop_source *) g_source_new (&uv_loop_source_funcs, sizeof (*source));
-    source->loop = loop;
-    g_source_add_unix_fd (&source->source,
-                          uv_backend_fd (loop),
-                          (GIOCondition) (G_IO_IN | G_IO_OUT | G_IO_ERR));
-    return &source->source;
+static void RunGLibMainloop (ThreadData *data) {
+    g_main_context_acquire (g_main_context_default ());
+    uv_mutex_lock (&data->mutex_handle);
+    while (uv_loop_alive (uv_default_loop ()))
+        IterateGLibMainloop(data);
+    delete data;
 }
 
 void StartLoop() {
-    GSource *source = uv_loop_source_new (uv_default_loop ());
-    g_source_attach (source, NULL);
+    ThreadData *data = new ThreadData();
+    uv_mutex_init (&data->mutex_handle);
+    uv_async_init (uv_default_loop (), &data->async_handle, DispatchGLibMainloop);
+    data->async_handle.data = data;
+
+    uv_thread_create (&data->thread_handle, (uv_thread_cb)RunGLibMainloop, data);
 }
 
 };

tests/loop.js

@@ -0,0 +1,23 @@
+/*
+ * loop.js
+ */
+
+
+const gi = require('../lib/')
+const Gtk = gi.require('Gtk', '3.0')
+
+gi.startLoop()
+Gtk.init()
+
+setTimeout(() => {
+  console.log('timeout')
+}, 1000)
+
+const promise = new Promise(resolve => resolve('promise resolved'))
+promise.then(result => console.log(result))
+
+setTimeout(() => {
+  console.log('quit')
+  Gtk.mainQuit()
+}, 5000)
+Gtk.main()