3f1b80218e
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@107 42af7a65-404d-4744-a932-0658087f49c3
148 lines
5.3 KiB
C
148 lines
5.3 KiB
C
/********************************************************************************
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* sched.h
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 Gregory Nutt 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 __SCHED_H
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#define __SCHED_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 <nuttx/sched.h>
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/********************************************************************************
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* Definitions
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********************************************************************************/
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/* Task Management Definitins ***************************************************/
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/* POSIX-like scheduling policies */
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#define SCHED_FIFO 1 /* FIFO per priority scheduling policy */
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#define SCHED_RR 2 /* Round robin scheduling policy */
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#define SCHED_OTHER 4 /* Not used */
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/* Pthread definitions **********************************************************/
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#define PTHREAD_KEYS_MAX CONFIG_NPTHREAD_KEYS
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/********************************************************************************
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* Global Type Definitions
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********************************************************************************/
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/* This is the POSIX-like scheduling parameter structure */
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struct sched_param
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{
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int sched_priority;
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};
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/********************************************************************************
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* Global Function Prototypes
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********************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/* Task Control Interfaces (non-standard) */
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#ifndef CONFIG_CUSTOM_STACK
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EXTERN STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
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FAR uint32 *stack, uint32 stack_size,
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main_t entry, char *argv[]);
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#else
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EXTERN STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
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main_t entry, char *argv[]);
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#endif
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EXTERN STATUS task_activate(FAR _TCB *tcb);
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#ifndef CONFIG_CUSTOM_STACK
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EXTERN int task_create(const char *name, int priority, int stack_size,
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main_t entry, char *argv[]);
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#else
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EXTERN int task_create(const char *name, int priority,
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main_t entry, char *argv[]);
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#endif
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EXTERN STATUS task_delete(pid_t pid);
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EXTERN STATUS task_restart(pid_t pid);
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/* Task Scheduling Interfaces (based on POSIX APIs) */
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EXTERN int sched_setparam(pid_t pid, const struct sched_param *param);
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EXTERN int sched_getparam(pid_t pid, struct sched_param *param);
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EXTERN int sched_setscheduler(pid_t pid, int policy,
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const struct sched_param *param);
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EXTERN int sched_getscheduler(pid_t pid);
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EXTERN int sched_yield(void);
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EXTERN int sched_get_priority_max(int policy);
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EXTERN int sched_get_priority_min(int policy);
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EXTERN int sched_rr_get_interval(pid_t pid, struct timespec *interval);
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/* Task Switching Interfaces (non-standard) */
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EXTERN STATUS sched_lock(void);
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EXTERN STATUS sched_unlock(void);
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EXTERN sint32 sched_lockcount(void);
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/* If instrumentation of the scheduler is enabled, then some
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* outboard logic must provide the following interfaces.
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*/
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#ifdef CONFIG_SCHED_INSTRUMENTATION
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EXTERN void sched_note_start(FAR _TCB *tcb );
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EXTERN void sched_note_stop(FAR _TCB *tcb );
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EXTERN void sched_note_switch(FAR _TCB *pFromTcb, FAR _TCB *pToTcb);
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#else
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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_switch(t1, t2)
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#endif /* CONFIG_SCHED_INSTRUMENTATION */
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __SCHED_H */
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