Rare case of timer callback with scheduler disabled

[aggarg (Gaurav Aggarwal)]

Very interesting discussion.

@richard-damon

but it actually doesn’t do it, as the tick interrupt can still happen and increase the tick, causing the block to go too late.

As @jefftenney explained, this cannot happen because the ticks are accumulated in xPendedTicks when the scheduler is suspended.

I wanted to point out this section in the documentation which states that:

Timer callback functions execute in the context of the timer service task. It is therefore essential that timer callback functions never attempt to block. For example, a timer callback function must not call vTaskDelay(), vTaskDelayUntil(), or specify a non zero block time when accessing a queue or a semaphore.

Given that we prohibit blocking in the timer callbacks, do we need this?