add get input_dev events in user app, but still have some problems

user/src/bin/inputdev_event.rs

@@ -0,0 +1,21 @@
+#![no_std]
+#![no_main]
+
+use user_lib::{event_get};
+
+#[macro_use]
+extern crate user_lib;
+
+#[no_mangle]
+pub fn main() -> i32 {
+    println!("Input device event test");
+    let mut event=0;
+    for _ in 0..3 {
+        while event==0 {
+            event = event_get();
+        }    
+        println!("event: {:?}", event);
+    }
+
+    0
+}

user/src/lib.rs

@@ -205,6 +205,11 @@ pub fn framebuffer_flush() -> isize {
     sys_framebuffer_flush()
 }
 
+pub fn event_get() -> isize {
+    sys_event_get()
+}
+
+
 #[macro_export]
 macro_rules! vstore {
     ($var_ref: expr, $value: expr) => {

user/src/syscall.rs

@@ -27,6 +27,7 @@ const SYSCALL_CONDVAR_SIGNAL: usize = 1031;
 const SYSCALL_CONDVAR_WAIT: usize = 1032;
 const SYSCALL_FRAMEBUFFER: usize = 2000;
 const SYSCALL_FRAMEBUFFER_FLUSH: usize = 2001;
+const SYSCALL_EVENT_GET: usize = 3000;
 
 fn syscall(id: usize, args: [usize; 3]) -> isize {
     let mut ret: isize;
@@ -164,4 +165,8 @@ pub fn sys_framebuffer() -> isize {
 
 pub fn sys_framebuffer_flush() -> isize {
     syscall(SYSCALL_FRAMEBUFFER_FLUSH, [0, 0, 0])
+}
+
+pub fn sys_event_get() -> isize {
+    syscall(SYSCALL_EVENT_GET, [0, 0, 0])
 }