e54b602208
It takes about 10 cycles to obtain the task list according to the task status. In most cases, we know the task status, so we can directly delete the task from the specified task list to reduce time consuming.
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/****************************************************************************
|
|
* sched/task/task_activate.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sched.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/irq.h>
|
|
#include <nuttx/sched.h>
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/sched_note.h>
|
|
|
|
#include "sched/sched.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nxtask_activate
|
|
*
|
|
* Description:
|
|
* This function activates tasks initialized by nxtask_setup_scheduler().
|
|
* Without activation, a task is ineligible for execution by the
|
|
* scheduler.
|
|
*
|
|
* Input Parameters:
|
|
* tcb - The TCB for the task for the task (same as the nxtask_init
|
|
* argument).
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void nxtask_activate(FAR struct tcb_s *tcb)
|
|
{
|
|
irqstate_t flags = enter_critical_section();
|
|
FAR struct tcb_s *rtcb = this_task();
|
|
|
|
#ifdef CONFIG_SCHED_INSTRUMENTATION
|
|
|
|
/* Check if this is really a re-start */
|
|
|
|
if (tcb->task_state != TSTATE_TASK_INACTIVE)
|
|
{
|
|
/* Inform the instrumentation layer that the task
|
|
* has stopped
|
|
*/
|
|
|
|
sched_note_stop(tcb);
|
|
}
|
|
|
|
/* Inform the instrumentation layer that the task
|
|
* has started
|
|
*/
|
|
|
|
sched_note_start(tcb);
|
|
#endif
|
|
|
|
/* Remove the task from waitting list */
|
|
|
|
nxsched_remove_blocked(tcb);
|
|
|
|
/* Add the task to ready-to-run task list, and
|
|
* perform the context switch if one is needed
|
|
*/
|
|
|
|
if (nxsched_add_readytorun(tcb))
|
|
{
|
|
up_unblock_task(tcb, rtcb);
|
|
}
|
|
|
|
leave_critical_section(flags);
|
|
}
|