hypha: move libraries to libs/

libs/xen/xenevtchn/src/lib.rs

@@ -0,0 +1,66 @@
+pub mod error;
+pub mod sys;
+
+use crate::error::Result;
+use crate::sys::{BindInterdomain, BindUnboundPort, BindVirq, Notify, UnbindPort};
+
+use std::fs::{File, OpenOptions};
+use std::os::fd::AsRawFd;
+
+pub struct EventChannel {
+    pub handle: File,
+}
+
+impl EventChannel {
+    pub fn open() -> Result<EventChannel> {
+        let file = OpenOptions::new()
+            .read(true)
+            .write(true)
+            .open("/dev/xen/evtchn")?;
+        Ok(EventChannel { handle: file })
+    }
+
+    pub fn bind_virq(&mut self, virq: u32) -> Result<u32> {
+        unsafe {
+            let mut request = BindVirq { virq };
+            Ok(sys::bind_virq(self.handle.as_raw_fd(), &mut request)? as u32)
+        }
+    }
+
+    pub fn bind_interdomain(&mut self, domid: u32, port: u32) -> Result<u32> {
+        unsafe {
+            let mut request = BindInterdomain {
+                remote_domain: domid,
+                remote_port: port,
+            };
+            Ok(sys::bind_interdomain(self.handle.as_raw_fd(), &mut request)? as u32)
+        }
+    }
+
+    pub fn bind_unbound_port(&mut self, domid: u32) -> Result<u32> {
+        unsafe {
+            let mut request = BindUnboundPort {
+                remote_domain: domid,
+            };
+            Ok(sys::bind_unbound_port(self.handle.as_raw_fd(), &mut request)? as u32)
+        }
+    }
+
+    pub fn unbind(&mut self, port: u32) -> Result<u32> {
+        unsafe {
+            let mut request = UnbindPort { port };
+            Ok(sys::unbind(self.handle.as_raw_fd(), &mut request)? as u32)
+        }
+    }
+
+    pub fn notify(&mut self, port: u32) -> Result<u32> {
+        unsafe {
+            let mut request = Notify { port };
+            Ok(sys::notify(self.handle.as_raw_fd(), &mut request)? as u32)
+        }
+    }
+
+    pub fn reset(&mut self) -> Result<u32> {
+        unsafe { Ok(sys::reset(self.handle.as_raw_fd())? as u32) }
+    }
+}