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167 lines
6.1 KiB
167 lines
6.1 KiB
/******************************************************************************** |
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* include/sched.h |
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* |
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* Copyright (C) 2007-2009, 2011 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_SCHED_H |
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#define __INCLUDE_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 <sys/types.h> |
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#include <stdint.h> |
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#include <nuttx/sched.h> |
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/******************************************************************************** |
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* Pre-processor Definitions |
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********************************************************************************/ |
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/* Task Management Definitions **************************************************/ |
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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_SPORADIC 3 /* Not supported */ |
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#define SCHED_OTHER 4 /* Not supported */ |
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/* Pthread definitions **********************************************************/ |
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#define PTHREAD_KEYS_MAX CONFIG_NPTHREAD_KEYS |
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/* Non-standard Helper **********************************************************/ |
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/* One processor family supported by NuttX has a single, fixed hardware stack. |
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* That is the 8051 family. So for that family only, there is a variant form |
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* of task_create() that does not take a stack size parameter. The following |
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* helper macros are provided to work around the ugliness of that exception. |
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*/ |
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#ifndef CONFIG_CUSTOM_STACK |
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# define TASK_INIT(t,n,p,m,s,e,a) task_init(t,n,p,m,s,e,a) |
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# define TASK_CREATE(n,p,s,e,a) task_create(n,p,s,e,a) |
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#else |
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# define TASK_INIT(t,n,p,m,s,e,a) task_init(t,n,p,e,a) |
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# define TASK_CREATE(n,p,s,e,a) task_create(n,p,e,a) |
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#endif |
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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 int task_init(FAR _TCB *tcb, const char *name, int priority, |
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FAR uint32_t *stack, uint32_t stack_size, |
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main_t entry, const char *argv[]); |
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#else |
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EXTERN int task_init(FAR _TCB *tcb, const char *name, int priority, |
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main_t entry, const char *argv[]); |
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#endif |
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EXTERN int 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, const 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, const char *argv[]); |
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#endif |
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EXTERN int task_delete(pid_t pid); |
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EXTERN int 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 int sched_lock(void); |
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EXTERN int sched_unlock(void); |
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EXTERN int sched_lockcount(void); |
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/* If instrumentation of the scheduler is enabled, then some outboard logic |
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* 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 /* __INCLUDE_SCHED_H */ |
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