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use crate::prelude::v1::*;
use crate::base::*;
use crate::shim::*;
use crate::units::*;
unsafe impl Send for Timer {}
unsafe impl Sync for Timer {}
pub struct Timer {
handle: FreeRtosTimerHandle,
detached: bool
}
pub struct TimerBuilder<D: DurationTicks> {
name: String,
period: D,
auto_reload: bool
}
impl<D: DurationTicks> TimerBuilder<D> {
pub fn set_name(&mut self, name: &str) -> &mut Self {
self.name = name.into();
self
}
pub fn set_period(&mut self, period: D) -> &mut Self {
self.period = period;
self
}
pub fn set_auto_reload(&mut self, auto_reload: bool) -> &mut Self {
self.auto_reload = auto_reload;
self
}
pub fn create<F>(&self, callback: F) -> Result<Timer, FreeRtosError>
where F: Fn(Timer) -> (),
F: Send + 'static
{
Timer::spawn(self.name.as_str(), self.period.to_ticks(), self.auto_reload, callback)
}
}
impl Timer {
pub fn new<D: DurationTicks>(period: D) -> TimerBuilder<D> {
TimerBuilder {
name: "timer".into(),
period: period,
auto_reload: true
}
}
unsafe fn spawn_inner<'a>(name: &str,
period_ticks: FreeRtosTickType,
auto_reload: bool,
callback: Box<dyn Fn(Timer) + Send + 'a>,)
-> Result<Timer, FreeRtosError> {
let f = Box::new(callback);
let param_ptr = &*f as *const _ as *mut _;
let (success, timer_handle) = {
let name = name.as_bytes();
let name_len = name.len();
let mut _timer_handle = mem::zeroed::<CVoid>();
let ret = freertos_rs_timer_create(name.as_ptr(),
name_len as u8,
period_ticks,
if auto_reload { 1 } else { 0 },
param_ptr,
timer_callback);
((ret as usize) != 0, ret)
};
if success {
mem::forget(f);
} else {
return Err(FreeRtosError::OutOfMemory);
}
extern "C" fn timer_callback(handle: FreeRtosTimerHandle) -> () {
unsafe {
{
let timer = Timer {
handle: handle,
detached: true
};
if let Ok(callback_ptr) = timer.get_id() {
let b = Box::from_raw(callback_ptr as *mut Box<dyn Fn(Timer)>);
b(timer);
Box::into_raw(b);
}
}
}
}
Ok(Timer {
handle: timer_handle as *const _,
detached: false
})
}
fn spawn<F>(name: &str,
period_tick: FreeRtosTickType,
auto_reload: bool,
callback: F)
-> Result<Timer, FreeRtosError>
where F: Fn(Timer) -> (),
F: Send + 'static
{
unsafe {
Timer::spawn_inner(name, period_tick, auto_reload, Box::new(callback))
}
}
pub fn start<D: DurationTicks>(&self, block_time: D) -> Result<(), FreeRtosError> {
unsafe {
if freertos_rs_timer_start(self.handle, block_time.to_ticks()) == 0 {
Ok(())
} else {
Err(FreeRtosError::Timeout)
}
}
}
pub fn stop<D: DurationTicks>(&self, block_time: D) -> Result<(), FreeRtosError> {
unsafe {
if freertos_rs_timer_stop(self.handle, block_time.to_ticks()) == 0 {
Ok(())
} else {
Err(FreeRtosError::Timeout)
}
}
}
pub fn change_period<D: DurationTicks>(&self, block_time: D, new_period: D) -> Result<(), FreeRtosError> {
unsafe {
if freertos_rs_timer_change_period(self.handle, block_time.to_ticks(), new_period.to_ticks()) == 0 {
Ok(())
} else {
Err(FreeRtosError::Timeout)
}
}
}
pub unsafe fn detach(mut self) {
self.detached = true;
}
fn get_id(&self) -> Result<FreeRtosVoidPtr, FreeRtosError> {
unsafe {
Ok(freertos_rs_timer_get_id(self.handle))
}
}
}
impl Drop for Timer {
#[allow(unused_must_use)]
fn drop(&mut self) {
if self.detached == true { return; }
unsafe {
if let Ok(callback_ptr) = self.get_id() {
Box::from_raw(callback_ptr as *mut Box<dyn Fn(Timer)>);
}
freertos_rs_timer_delete(self.handle, Duration::ms(1000).to_ticks());
}
}
}