258 lines
8.1 KiB
C
258 lines
8.1 KiB
C
/****************************************************************************
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* include/nuttx/sched_note.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_SCHED_NOTE_H
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#define __INCLUDE_NUTTX_SCHED_NOTE_H
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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 <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <nuttx/sched.h>
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#ifdef CONFIG_SCHED_INSTRUMENTATION
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifdef CONFIG_SCHED_INSTRUMENTATION_BUFFER
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/* This type identifies a note structure */
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enum note_type_e
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{
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NOTE_START = 0,
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NOTE_STOP,
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NOTE_SUSPEND,
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NOTE_RESUME
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#ifdef CONFIG_SCHED_INSTRUMENTATION_PREEMPTION
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,
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NOTE_PREEMPT_LOCK,
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NOTE_PREEMPT_UNLOCK
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#endif
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#ifdef CONFIG_SCHED_INSTRUMENTATION_CSECTION
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,
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NOTE_CSECTION_ENTER,
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NOTE_CSECTION_LEAVE
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#endif
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};
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/* This structure provides the common header of each note */
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struct note_common_s
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{
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uint8_t nc_length; /* Length of the note */
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uint8_t nc_type; /* See enum note_type_e */
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uint8_t nc_priority; /* Thread/task priority */
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#ifdef CONFIG_SMP
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uint8_t nc_cpu; /* CPU thread/task running on */
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#endif
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uint8_t nc_pid[2]; /* ID of the thread/task */
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uint8_t nc_systime[4]; /* Time when note buffered */
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};
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/* This is the specific form of the NOTE_START note */
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struct note_start_s
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{
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struct note_common_s nst_cmn; /* Common note parameters */
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#if CONFIG_TASK_NAME_SIZE > 0
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char nst_name[1]; /* Start of the name of the thread/task */
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#endif
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};
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/* This is the specific form of the NOTE_STOP note */
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struct note_stop_s
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{
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struct note_common_s nsp_cmn; /* Common note parameters */
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};
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/* This is the specific form of the NOTE_SUSPEND note */
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struct note_suspend_s
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{
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struct note_common_s nsu_cmn; /* Common note parameters */
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uint8_t nsu_state; /* Task state */
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};
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/* This is the specific form of the NOTE_RESUME note */
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struct note_resume_s
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{
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struct note_common_s nre_cmn; /* Common note parameters */
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};
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#ifdef CONFIG_SCHED_INSTRUMENTATION_PREEMPTION
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/* This is the specific form of the NOTE_PREEMPT_LOCK/UNLOCK note */
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struct note_preempt_s
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{
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struct note_common_s npr_cmn; /* Common note parameters */
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uint8_t npr_count[2]; /* Count of nested locks */
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};
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#endif /* CONFIG_SCHED_INSTRUMENTATION_PREEMPTION */
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#ifdef CONFIG_SCHED_INSTRUMENTATION_CSECTION
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/* This is the specific form of the NOTE_CSECTION_ENTER/LEAVE note */
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struct note_csection_s
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{
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struct note_common_s ncs_cmn; /* Common note parameters */
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#ifdef CONFIG_SMP
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uint8_t ncs_count[2]; /* Count of nested csections */
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#endif
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};
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#endif /* CONFIG_SCHED_INSTRUMENTATION_CSECTION */
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#endif /* CONFIG_SCHED_INSTRUMENTATION_BUFFER */
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/********************************************************************************
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* Name: sched_note_*
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*
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* Description:
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* If instrumentation of the scheduler is enabled, then some outboard logic
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* must provide the following interfaces. These interfaces are not availalble
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* to application code.
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*
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* NOTE: if CONFIG_SCHED_INSTRUMENTATION_BUFFER, then these interfaces are
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* *not* available to the platform-specific logic. Rather, they provided by
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* the note buffering logic. See sched_note_get() below.
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*
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* Input Parameters:
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* tcb - The TCB of the thread.
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*
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* Returned Value:
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* None
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*
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********************************************************************************/
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void sched_note_start(FAR struct tcb_s *tcb);
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void sched_note_stop(FAR struct tcb_s *tcb);
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void sched_note_suspend(FAR struct tcb_s *tcb);
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void sched_note_resume(FAR struct tcb_s *tcb);
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#ifdef CONFIG_SCHED_INSTRUMENTATION_PREEMPTION
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void sched_note_premption(FAR struct tcb_s *tcb, bool locked);
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#endif
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#ifdef CONFIG_SCHED_INSTRUMENTATION_CSECTION
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void sched_note_csection(FAR struct tcb_s *tcb, bool enter);
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#endif
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/****************************************************************************
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* Name: sched_note_get
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*
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* Description:
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* Remove the next note from the tail of the circular buffer. The note
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* is also removed from the circular buffer to make room for futher notes.
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*
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* Input Parameters:
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* buffer - Location to return the next note
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* buflen - The length of the user provided buffer.
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*
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* Returned Value:
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* On success, the positive, non-zero length of the return note is
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* provided. Zero is returned only if ther circular buffer is empty. A
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* negated errno value is returned in the event of any failure.
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*
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****************************************************************************/
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#ifdef CONFIG_SCHED_INSTRUMENTATION_BUFFER
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ssize_t sched_note_get(FAR uint8_t *buffer, size_t buflen);
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#endif
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/****************************************************************************
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* Name: sched_note_size
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*
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* Description:
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* Return the size of the next note at the tail of the circular buffer.
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*
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* Input Parameters:
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* None.
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*
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* Returned Value:
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* Zero is returned if the circular buffer is empty. Otherwise, the size
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* of the next note is returned.
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*
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****************************************************************************/
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#ifdef CONFIG_SCHED_INSTRUMENTATION_BUFFER
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ssize_t sched_note_size(void);
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#endif
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/****************************************************************************
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* Name: note_register
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*
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* Description:
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* Register a serial driver at /dev/note that can be used by an
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* application to read data from the circular not buffer.
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*
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* Input Parameters:
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* None.
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*
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* Returned Value:
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* Zero is returned if the circular buffer is empty. Otherwise, a negated
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* errno value is returned.
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*
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****************************************************************************/
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#if defined(CONFIG_SCHED_INSTRUMENTATION_BUFFER) && \
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defined(CONFIG_DRIVER_NOTE)
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int note_register(void);
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#endif
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#else /* CONFIG_SCHED_INSTRUMENTATION */
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# define sched_note_start(t)
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# define sched_note_stop(t)
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# define sched_note_suspend(t)
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# define sched_note_resume(t)
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# define sched_note_premption(t,l)
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# define sched_note_csection(t,e)
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#endif /* CONFIG_SCHED_INSTRUMENTATION */
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#endif /* __INCLUDE_NUTTX_SCHED_NOTE_H */
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