Clone for device (RustAudio#830)

* Clone for Device and Alsa Device

* fix cloning around PCM

* add Clone for oboe Device

* add Clone for ASIO Device

src/host/alsa/enumerate.rs

@@ -2,6 +2,7 @@ use super::alsa;
 use super::parking_lot::Mutex;
 use super::{Device, DeviceHandles};
 use crate::{BackendSpecificError, DevicesError};
+use std::sync::Arc;
 
 /// ALSA's implementation for `Devices`.
 pub struct Devices {
@@ -37,7 +38,7 @@ impl Iterator for Devices {
  if let Ok(handles) = DeviceHandles::open(&name) {
  return Some(Device {
  name,
- handles: Mutex::new(handles),
+ handles: Arc::new(Mutex::new(handles)),
  });
  }
  }
@@ -50,15 +51,15 @@ impl Iterator for Devices {
 pub fn default_input_device() -> Option<Device> {
  Some(Device {
  name: "default".to_owned(),
- handles: Mutex::new(Default::default()),
+ handles: Arc::new(Mutex::new(Default::default())),
  })
 }
 
 #[inline]
 pub fn default_output_device() -> Option<Device> {
  Some(Device {
  name: "default".to_owned(),
- handles: Mutex::new(Default::default()),
+ handles: Arc::new(Mutex::new(Default::default())),
  })
 }
 

src/host/alsa/mod.rs

@@ -236,9 +236,10 @@ impl DeviceHandles {
  }
 }
 
+#[derive(Clone)]
 pub struct Device {
  name: String,
- handles: Mutex<DeviceHandles>,
+ handles: Arc<Mutex<DeviceHandles>>,
 }
 
 impl Device {

src/host/asio/device.rs

@@ -18,6 +18,7 @@ use std::hash::{Hash, Hasher};
 use std::sync::Arc;
 
 /// A ASIO Device
+#[derive(Clone)]
 pub struct Device {
  /// The driver represented by this device.
  pub driver: Arc<sys::Driver>,

src/host/oboe/mod.rs

@@ -37,6 +37,7 @@ const SAMPLE_RATES: [i32; 13] = [
 ];
 
 pub struct Host;
+#[derive(Clone)]
 pub struct Device(Option<oboe::AudioDeviceInfo>);
 pub enum Stream {
  Input(Box<RefCell<dyn AudioInputStream>>),

src/platform/mod.rs

@@ -55,6 +55,7 @@ macro_rules! impl_platform_host {
 
  /// The `Device` implementation associated with the platform's dynamically dispatched
  /// [`Host`] type.
+ #[derive(Clone)]
  pub struct Device(DeviceInner);
 
  /// The `Devices` iterator associated with the platform's dynamically dispatched [`Host`]
@@ -89,6 +90,7 @@ macro_rules! impl_platform_host {
  }
 
  /// Contains a platform specific [`Device`] implementation.
+ #[derive(Clone)]
  pub enum DeviceInner {
  $(
  $(#[cfg($feat)])?