WIP: Kevent

kernel/scheme/debug.rs

@@ -48,7 +48,7 @@ impl Scheme for DebugScheme {
             if i > 0 {
                 return Ok(i);
             } else {
-                unsafe { context::switch(); }
+                unsafe { context::switch(); } //TODO: Block
             }
         }
     }

kernel/scheme/event.rs

@@ -0,0 +1,33 @@
+use core::{mem, str};
+
+use arch::interrupt::irq::{ACKS, COUNTS, acknowledge};
+use syscall::error::*;
+use syscall::scheme::Scheme;
+
+pub struct EventScheme;
+
+impl Scheme for EventScheme {
+    fn open(&self, _path: &[u8], _flags: usize) -> Result<usize> {
+        Ok(
+    }
+
+    fn dup(&self, file: usize) -> Result<usize> {
+        Ok(file)
+    }
+
+    fn read(&self, file: usize, buffer: &mut [u8]) -> Result<usize> {
+        Ok(0)
+    }
+
+    fn write(&self, file: usize, buffer: &[u8]) -> Result<usize> {
+        Ok(0)
+    }
+
+    fn fsync(&self, _file: usize) -> Result<usize> {
+        Ok(0)
+    }
+
+    fn close(&self, _file: usize) -> Result<usize> {
+        Ok(0)
+    }
+}

kernel/scheme/user.rs

@@ -52,7 +52,7 @@ impl UserInner {
                 }
             }
 
-            unsafe { context::switch(); }
+            unsafe { context::switch(); } //TODO: Block
         }
     }
 
@@ -163,7 +163,7 @@ impl UserInner {
                 if i > 0 {
                     return Ok(i * packet_size);
                 } else {
-                    unsafe { context::switch(); }
+                    unsafe { context::switch(); } //TODO: Block
                 }
             }
         } else {
@@ -230,7 +230,12 @@ impl Scheme for UserScheme {
 
     fn seek(&self, file: usize, position: usize, whence: usize) -> Result<usize> {
         let inner = self.inner.upgrade().ok_or(Error::new(ENODEV))?;
-        inner.call(SYS_FSYNC, file, position, whence)
+        inner.call(SYS_LSEEK, file, position, whence)
+    }
+
+    fn fevent(&self, file: usize, flags: usize) -> Result<usize> {
+        let inner = self.inner.upgrade().ok_or(Error::new(ENODEV))?;
+        inner.call(SYS_FEVENT, file, flags, 0)
     }
 
     fn fstat(&self, file: usize, stat: &mut Stat) -> Result<usize> {