ae9ef972c0
Current `CONFIG_PAGING` refers to an experimental implementation to enable embedded MCUs with some limited RAM space to execute large programs from some non-random access media. On-demand paging should be implemented for the kernel mode with address environment implementation enabled.
120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/****************************************************************************
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* sched/sched/sched_get_stateinfo.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <string.h>
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#include <stdio.h>
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#include <semaphore.h>
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#include <nuttx/mutex.h>
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#include <nuttx/irq.h>
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#include "nuttx/sched.h"
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/****************************************************************************
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* Pre-processor types
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****************************************************************************/
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/* This is the state info of the task_state field of the TCB */
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static FAR const char * const g_statenames[] =
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{
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"Invalid",
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"Waiting,Unlock",
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"Ready",
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#ifdef CONFIG_SMP
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"Assigned",
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#endif
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"Running",
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"Inactive",
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"Waiting,Semaphore",
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"Waiting,Signal"
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#if !defined(CONFIG_DISABLE_MQUEUE) || !defined(CONFIG_DISABLE_MQUEUE_SYSV)
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, "Waiting,MQ empty"
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, "Waiting,MQ full"
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#endif
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#ifdef CONFIG_LEGACY_PAGING
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, "Waiting,Paging fill"
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#endif
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#ifdef CONFIG_SIG_SIGSTOP_ACTION
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, "Stopped"
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#endif
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};
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxsched_get_stateinfo
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*
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* Description:
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* Report information about a thread's state
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*
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* Input Parameters:
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* tcb - The TCB for the task (same as the nxtask_init argument).
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* state - User-provided location to return the state information.
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* length - The size of the state
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*
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****************************************************************************/
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void nxsched_get_stateinfo(FAR struct tcb_s *tcb, FAR char *state,
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size_t length)
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{
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irqstate_t flags;
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#ifdef CONFIG_ARCH_ADDRENV
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FAR struct addrenv_s *oldenv;
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if (tcb->addrenv_own)
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{
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addrenv_select(tcb->addrenv_own, &oldenv);
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}
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#endif
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/* if the state is waiting mutex */
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flags = enter_critical_section();
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if (tcb->task_state == TSTATE_WAIT_SEM &&
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((FAR sem_t *)(tcb->waitobj))->flags & SEM_TYPE_MUTEX)
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{
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pid_t holder = ((FAR mutex_t *)(tcb->waitobj))->holder;
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leave_critical_section(flags);
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snprintf(state, length, "Waiting,Mutex:%d", holder);
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}
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else
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{
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leave_critical_section(flags);
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strlcpy(state, g_statenames[tcb->task_state], length);
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}
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#ifdef CONFIG_ARCH_ADDRENV
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if (tcb->addrenv_own)
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{
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addrenv_restore(oldenv);
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}
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#endif
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}
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