146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/****************************************************************************
|
|
* sched/sched/sched_resumescheduler.c
|
|
*
|
|
* Copyright (C) 2015, 2018 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <assert.h>
|
|
|
|
#include <nuttx/sched.h>
|
|
#include <nuttx/clock.h>
|
|
#include <nuttx/sched_note.h>
|
|
|
|
#include "irq/irq.h"
|
|
#include "sched/sched.h"
|
|
|
|
#if CONFIG_RR_INTERVAL > 0 || defined(CONFIG_SCHED_RESUMESCHEDULER)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sched_resume_scheduler
|
|
*
|
|
* Description:
|
|
* Called by architecture specific implementations that block task
|
|
* execution. This function prepares the scheduler for the thread that is
|
|
* about to be restarted.
|
|
*
|
|
* Input Parameters:
|
|
* tcb - The TCB of the thread to be restarted.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void sched_resume_scheduler(FAR struct tcb_s *tcb)
|
|
{
|
|
#if CONFIG_RR_INTERVAL > 0
|
|
#ifdef CONFIG_SCHED_SPORADIC
|
|
if ((tcb->flags & TCB_FLAG_POLICY_MASK) == TCB_FLAG_SCHED_RR)
|
|
#endif
|
|
{
|
|
/* Reset the task's timeslice. */
|
|
|
|
tcb->timeslice = MSEC2TICK(CONFIG_RR_INTERVAL);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SCHED_SPORADIC
|
|
#if CONFIG_RR_INTERVAL > 0
|
|
else
|
|
#endif
|
|
if ((tcb->flags & TCB_FLAG_POLICY_MASK) == TCB_FLAG_SCHED_SPORADIC)
|
|
{
|
|
/* Reset the replenishment cycle if it is appropriate to do so */
|
|
|
|
DEBUGVERIFY(sched_sporadic_resume(tcb));
|
|
}
|
|
#endif
|
|
|
|
/* Indicate the task has been resumed */
|
|
|
|
#ifdef CONFIG_SCHED_CRITMONITOR
|
|
sched_critmon_resume(tcb);
|
|
#endif
|
|
#ifdef CONFIG_SCHED_INSTRUMENTATION
|
|
sched_note_resume(tcb);
|
|
#endif
|
|
|
|
#ifdef CONFIG_SMP
|
|
/* NOTE: The following logic for adjusting global IRQ controls were
|
|
* derived from sched_addreadytorun() and sched_removedreadytorun()
|
|
* Here, we only handles clearing logic to defer unlocking IRQ lock
|
|
* followed by context switching.
|
|
*/
|
|
|
|
int me = this_cpu();
|
|
|
|
/* Adjust global IRQ controls. If irqcount is greater than zero,
|
|
* then this task/this CPU holds the IRQ lock
|
|
*/
|
|
|
|
if (tcb->irqcount > 0)
|
|
{
|
|
/* Do notihing here
|
|
* NOTE: spin_setbit() is done in sched_addreadytorun()
|
|
* and sched_removereadytorun()
|
|
*/
|
|
}
|
|
|
|
/* No.. This CPU will be relinquishing the lock. But this works
|
|
* differently if we are performing a context switch from an
|
|
* interrupt handler and the interrupt handler has established
|
|
* a critical section. We can detect this case when
|
|
* g_cpu_nestcount[me] > 0.
|
|
*/
|
|
|
|
else if (g_cpu_nestcount[me] <= 0)
|
|
{
|
|
/* Release our hold on the IRQ lock. */
|
|
|
|
spin_clrbit(&g_cpu_irqset, me, &g_cpu_irqsetlock,
|
|
&g_cpu_irqlock);
|
|
}
|
|
#endif /* CONFIG_SMP */
|
|
}
|
|
|
|
#endif /* CONFIG_RR_INTERVAL > 0 || CONFIG_SCHED_RESUMESCHEDULER */
|