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nuttx/sched/sched/sched_continue.c

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This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
/****************************************************************************
* sched/sched/sched_continue.c
*
Completes the Implementation of the TLS-based errno - Remove per-thread errno from the TCB structure (pterrno) - Remove get_errno() and set_errno() as functions. The macros are still available as stubs and will be needed in the future if we need to access the errno from a different address environment (KERNEL mode). - Add errno value to the tls_info_s structure definitions - Move sched/errno to libs/libc/errno. Replace old TCB access to the errno with TLS access to the errno.
2020-05-07 22:15:09 +02:00
* 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
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
*
Completes the Implementation of the TLS-based errno - Remove per-thread errno from the TCB structure (pterrno) - Remove get_errno() and set_errno() as functions. The macros are still available as stubs and will be needed in the future if we need to access the errno from a different address environment (KERNEL mode). - Add errno value to the tls_info_s structure definitions - Move sched/errno to libs/libc/errno. Replace old TCB access to the errno with TLS access to the errno.
2020-05-07 22:15:09 +02:00
* http://www.apache.org/licenses/LICENSE-2.0
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
*
Completes the Implementation of the TLS-based errno - Remove per-thread errno from the TCB structure (pterrno) - Remove get_errno() and set_errno() as functions. The macros are still available as stubs and will be needed in the future if we need to access the errno from a different address environment (KERNEL mode). - Add errno value to the tls_info_s structure definitions - Move sched/errno to libs/libc/errno. Replace old TCB access to the errno with TLS access to the errno.
2020-05-07 22:15:09 +02:00
* 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.
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sched.h>
#include <assert.h>
#include <nuttx/irq.h>
#include <nuttx/sched.h>
#include <nuttx/arch.h>
#include "sched/sched.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
sched/sched/sched.h: Make naming of all internal names consistent: 1. Add internal scheduler functions should begin with nxsched_, not sched_ 2. Follow the consistent naming patter of https://cwiki.apache.org/confluence/display/NUTTX/Naming+of+OS+Internal+Functions
2020-05-09 20:40:14 +02:00
* Name: nxsched_continue
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
*
* Description:
* Resume the specified thread. This is normally calling indirectly
* via group_continue();
*
****************************************************************************/
sched/sched/sched.h: Make naming of all internal names consistent: 1. Add internal scheduler functions should begin with nxsched_, not sched_ 2. Follow the consistent naming patter of https://cwiki.apache.org/confluence/display/NUTTX/Naming+of+OS+Internal+Functions
2020-05-09 20:40:14 +02:00
void nxsched_continue(FAR struct tcb_s *tcb)
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
{
irqstate_t flags;
DEBUGASSERT(tcb != NULL && tcb->task_state == TSTATE_TASK_STOPPED);
flags = enter_critical_section();
/* Simply restart the thread. If is was blocked before, it will awaken
Completes the Implementation of the TLS-based errno - Remove per-thread errno from the TCB structure (pterrno) - Remove get_errno() and set_errno() as functions. The macros are still available as stubs and will be needed in the future if we need to access the errno from a different address environment (KERNEL mode). - Add errno value to the tls_info_s structure definitions - Move sched/errno to libs/libc/errno. Replace old TCB access to the errno with TLS access to the errno.
2020-05-07 22:15:09 +02:00
* with errcode = EINTR and will appears as if it were awakened by a
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT. Squashed commit of the following: Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored. sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues. sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error. sched/group and sched/sched: Finish framework for continue/resume logic. sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 18:27:18 +02:00
* signal. If pre-emption is not disabled this action could block this
* task here!
*/
up_unblock_task(tcb);
leave_critical_section(flags);
}
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