Light Scheduler
===============

It is a simple and light scheduler. It is non preemptive and priority based.
The task with the lowest priority will be executed next.

It will be very to use on embedded devices.



Dependency
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It requires the following libraries :
#include <stddef.h> for NULL
#include <stdint.h> for uint8_t, etc

Quick Start
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Only three function are necessary for using the LightScheduler.

1/ int SchedulerInit(SleepFct_t sleep_fct, ErrorFct_t error_fct);

This function will initalize the LightScheduler. 
You can pass a sleep_fct which will be executed when no more task are ready.
It can be use to set the device in a low power mode waiting for an interrupt.
If you do not wish to use this feature, just put a NULL instead.

You can pass a error_fct which will run at the end of each task and has as parameter the return value of this task.
It can be use to handle error of the tasks.
If you do not wish to use this feature, just put a NULL instead.

2/ int SchedulerAddTask(int32_t priority, const Task_t *task);

This function add a task to the scheduler.
The lowest priority will be executed fist by the scheduler.
/!\ WARNING: if you use this function inside an interrupt, it will be necessary to add critical section protection inside the SchedulerRunLoop.

3/ void SchedulerRunLoop(void)

Your program will never leave this function.
It start the scheduler.