Function cushion

kernel/generic/src/proc/thread.c:119–150

Thread wrapper. * * This wrapper is provided to ensure that every thread makes a call to * thread_exit() when its implementing function returns. * * interrupts_disable() is assumed. * */

 *
 */
static void cushion(void)
{
	void (*f)(void *) = THREAD->thread_code;
	void *arg = THREAD->thread_arg;
	THREAD->last_cycle = get_cycle();

	/* This is where each thread wakes up after its creation */
	irq_spinlock_unlock(&THREAD->lock, false);
	interrupts_enable();

	f(arg);

	/* Accumulate accounting to the task */
	irq_spinlock_lock(&THREAD->lock, true);
	if (!THREAD->uncounted) {
		thread_update_accounting(true);
		uint64_t ucycles = THREAD->ucycles;
		THREAD->ucycles = 0;
		uint64_t kcycles = THREAD->kcycles;
		THREAD->kcycles = 0;

		irq_spinlock_pass(&THREAD->lock, &TASK->lock);
		TASK->ucycles += ucycles;
		TASK->kcycles += kcycles;
		irq_spinlock_unlock(&TASK->lock, true);
	} else
		irq_spinlock_unlock(&THREAD->lock, true);

	thread_exit();

	/* Not reached */
}

/** Initialization and allocation for thread_t structure
 *