Rename tokio example to futures

It has nothing to do with tokio anymore with the newer futures version,
tokio would only come in if actual tokio API (e.g. for sockets) is used.

examples/Cargo.toml

@@ -17,8 +17,7 @@ gstreamer-rtsp-server-sys = { git = "https://github.com/sdroege/gstreamer-sys",
 gtk = { git = "https://github.com/gtk-rs/gtk", features = ["v3_6"], optional = true }
 gdk = { git = "https://github.com/gtk-rs/gdk", optional = true }
 gio = { git = "https://github.com/gtk-rs/gio", optional = true }
-futures = { version = "0.1", optional = true }
-tokio-core = { version = "0.1", optional = true }
+futures = { version = "0.2", optional = true }
 send-cell = "0.1"
 byte-slice-cast = "0.1"
 failure = "0.1"
@@ -30,7 +29,7 @@ gtksink = ["gtk", "gio"]
 gtkvideooverlay = ["gtk", "gdk", "gio"]
 gtkvideooverlay-x11 = ["gtkvideooverlay"]
 gtkvideooverlay-quartz = ["gtkvideooverlay"]
-tokio = ["gstreamer/futures", "futures", "tokio-core"]
+generic-futures = ["gstreamer/futures", "futures"]
 gst-rtsp-server = ["gstreamer-rtsp-server"]
 gst-rtsp-server-record = ["gstreamer-rtsp-server", "gstreamer-rtsp", "gio"]
 default-features = []
@@ -98,8 +97,8 @@ name = "tagsetter"
 name = "toc"
 
 [[bin]]
-name = "tokio"
-required-features = ["tokio"]
+name = "futures"
+required-features = ["generic-futures"]
 
 [[bin]]
 name = "rtsp-server-record"

examples/src/bin/futures.rs

@@ -2,9 +2,8 @@ extern crate gstreamer as gst;
 use gst::prelude::*;
 
 extern crate futures;
-use futures::stream::Stream;
-extern crate tokio_core;
-use tokio_core::reactor::Core;
+use futures::executor::block_on;
+use futures::prelude::*;
 
 use std::env;
 
@@ -16,39 +15,39 @@ fn example_main() {
 
     gst::init().unwrap();
 
-    let mut core = Core::new().unwrap();
-
     let pipeline = gst::parse_launch(&pipeline_str).unwrap();
     let bus = pipeline.get_bus().unwrap();
 
     let ret = pipeline.set_state(gst::State::Playing);
     assert_ne!(ret, gst::StateChangeReturn::Failure);
 
-    let messages = gst::BusStream::new(&bus).for_each(|msg| {
-        use gst::MessageView;
+    let messages = gst::BusStream::new(&bus)
+        .for_each(|msg| {
+            use gst::MessageView;
 
-        let quit = match msg.view() {
-            MessageView::Eos(..) => true,
-            MessageView::Error(err) => {
-                println!(
-                    "Error from {:?}: {} ({:?})",
-                    err.get_src().map(|s| s.get_path_string()),
-                    err.get_error(),
-                    err.get_debug()
-                );
-                true
+            let quit = match msg.view() {
+                MessageView::Eos(..) => true,
+                MessageView::Error(err) => {
+                    println!(
+                        "Error from {:?}: {} ({:?})",
+                        err.get_src().map(|s| s.get_path_string()),
+                        err.get_error(),
+                        err.get_debug()
+                    );
+                    true
+                }
+                _ => false,
+            };
+
+            if quit {
+                Err(())
+            } else {
+                Ok(())
             }
-            _ => false,
-        };
+        })
+        .and_then(|_| Ok(()));
 
-        if quit {
-            Err(())
-        } else {
-            Ok(())
-        }
-    });
-
-    let _ = core.run(messages);
+    let _ = block_on(messages);
 
     let ret = pipeline.set_state(gst::State::Null);
     assert_ne!(ret, gst::StateChangeReturn::Failure);