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use self::Req::*;
use libc;
use ptr;
use comm;
use sys::c;
use sys::fs::FileDesc;
use sys_common::helper_thread::Helper;
use prelude::*;
use io::IoResult;
helper_init! { static HELPER: Helper<Req> }
pub trait Callback {
fn call(&mut self);
}
pub struct Timer {
obj: libc::HANDLE,
on_worker: bool,
}
pub enum Req {
NewTimer(libc::HANDLE, Box<Callback + Send>, bool),
RemoveTimer(libc::HANDLE, Sender<()>),
}
unsafe impl Send for Req {}
fn helper(input: libc::HANDLE, messages: Receiver<Req>, _: ()) {
let mut objs = vec![input];
let mut chans = vec![];
'outer: loop {
let idx = unsafe {
imp::WaitForMultipleObjects(objs.len() as libc::DWORD,
objs.as_ptr(),
0 as libc::BOOL,
libc::INFINITE)
};
if idx == 0 {
loop {
match messages.try_recv() {
Ok(NewTimer(obj, c, one)) => {
objs.push(obj);
chans.push((c, one));
}
Ok(RemoveTimer(obj, c)) => {
c.send(());
match objs.iter().position(|&o| o == obj) {
Some(i) => {
drop(objs.remove(i));
drop(chans.remove(i - 1));
}
None => {}
}
}
Err(comm::Disconnected) => {
assert_eq!(objs.len(), 1);
assert_eq!(chans.len(), 0);
break 'outer;
}
Err(..) => break
}
}
} else {
let remove = {
match &mut chans[idx as uint - 1] {
&(ref mut c, oneshot) => { c.call(); oneshot }
}
};
if remove {
drop(objs.remove(idx as uint));
drop(chans.remove(idx as uint - 1));
}
}
}
}
pub fn now() -> u64 {
let mut ticks_per_s = 0;
assert_eq!(unsafe { libc::QueryPerformanceFrequency(&mut ticks_per_s) }, 1);
let ticks_per_s = if ticks_per_s == 0 {1} else {ticks_per_s};
let mut ticks = 0;
assert_eq!(unsafe { libc::QueryPerformanceCounter(&mut ticks) }, 1);
return (ticks as u64 * 1000) / (ticks_per_s as u64);
}
impl Timer {
pub fn new() -> IoResult<Timer> {
HELPER.boot(|| {}, helper);
let obj = unsafe {
imp::CreateWaitableTimerA(ptr::null_mut(), 0, ptr::null())
};
if obj.is_null() {
Err(super::last_error())
} else {
Ok(Timer { obj: obj, on_worker: false, })
}
}
fn remove(&mut self) {
if !self.on_worker { return }
let (tx, rx) = channel();
HELPER.send(RemoveTimer(self.obj, tx));
rx.recv();
self.on_worker = false;
}
pub fn sleep(&mut self, msecs: u64) {
self.remove();
let due = -(msecs as i64 * 10000) as libc::LARGE_INTEGER;
assert_eq!(unsafe {
imp::SetWaitableTimer(self.obj, &due, 0, ptr::null_mut(),
ptr::null_mut(), 0)
}, 1);
let _ = unsafe { imp::WaitForSingleObject(self.obj, libc::INFINITE) };
}
pub fn oneshot(&mut self, msecs: u64, cb: Box<Callback + Send>) {
self.remove();
let due = -(msecs as i64 * 10000) as libc::LARGE_INTEGER;
assert_eq!(unsafe {
imp::SetWaitableTimer(self.obj, &due, 0, ptr::null_mut(),
ptr::null_mut(), 0)
}, 1);
HELPER.send(NewTimer(self.obj, cb, true));
self.on_worker = true;
}
pub fn period(&mut self, msecs: u64, cb: Box<Callback + Send>) {
self.remove();
let due = -(msecs as i64 * 10000) as libc::LARGE_INTEGER;
assert_eq!(unsafe {
imp::SetWaitableTimer(self.obj, &due, msecs as libc::LONG,
ptr::null_mut(), ptr::null_mut(), 0)
}, 1);
HELPER.send(NewTimer(self.obj, cb, false));
self.on_worker = true;
}
}
impl Drop for Timer {
fn drop(&mut self) {
self.remove();
assert!(unsafe { libc::CloseHandle(self.obj) != 0 });
}
}
mod imp {
use libc::{LPSECURITY_ATTRIBUTES, BOOL, LPCSTR, HANDLE, LARGE_INTEGER,
LONG, LPVOID, DWORD, c_void};
pub type PTIMERAPCROUTINE = *mut c_void;
extern "system" {
pub fn CreateWaitableTimerA(lpTimerAttributes: LPSECURITY_ATTRIBUTES,
bManualReset: BOOL,
lpTimerName: LPCSTR) -> HANDLE;
pub fn SetWaitableTimer(hTimer: HANDLE,
pDueTime: *const LARGE_INTEGER,
lPeriod: LONG,
pfnCompletionRoutine: PTIMERAPCROUTINE,
lpArgToCompletionRoutine: LPVOID,
fResume: BOOL) -> BOOL;
pub fn WaitForMultipleObjects(nCount: DWORD,
lpHandles: *const HANDLE,
bWaitAll: BOOL,
dwMilliseconds: DWORD) -> DWORD;
pub fn WaitForSingleObject(hHandle: HANDLE,
dwMilliseconds: DWORD) -> DWORD;
}
}