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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LINUX_SCHED_H_
#define _LINUX_SCHED_H_
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/sleepqueue.h>
#define MAX_SCHEDULE_TIMEOUT LONG_MAX
#define TASK_DORMANT 0
#define TASK_RUNNING 1
#define TASK_INTERRUPTIBLE 2
#define TASK_UNINTERRUPTIBLE 4
#define TASK_DEAD 64
#define TASK_WAKEKILL 128
#define TASK_WAKING 256
#define TASK_SHOULD_STOP 1
#define TASK_STOPPED 2
/*
* A task_struct is only provided for those tasks created with kthread.
* Using these routines with threads not started via kthread will cause
* panics because no task_struct is allocated and td_retval[1] is
* overwritten by syscalls which kernel threads will not make use of.
*/
struct task_struct {
struct thread *task_thread;
int (*task_fn)(void *data);
void *task_data;
int task_ret;
int state;
int should_stop;
struct mtx lock;
};
#define current ((struct task_struct *)curthread->td_retval[1])
#define task_struct_get(x) (struct task_struct *)(x)->td_retval[1]
#define task_struct_set(x, y) (x)->td_retval[1] = (register_t)(y)
#define set_current_state(x) \
atomic_store_rel_int((volatile int *)¤t->state, (x))
#define __set_current_state(x) current->state = (x)
#define schedule() \
do { \
void *c; \
\
if (cold) \
break; \
c = curthread; \
sleepq_lock(c); \
if (current->state == TASK_INTERRUPTIBLE || \
current->state == TASK_UNINTERRUPTIBLE) { \
sleepq_add(c, NULL, "task", SLEEPQ_SLEEP, 0); \
sleepq_wait(c, 0); \
} else { \
sleepq_release(c); \
sched_relinquish(curthread); \
} \
} while (0)
#define wake_up_process(x) \
do { \
int wakeup_swapper; \
void *c; \
\
c = (x)->task_thread; \
sleepq_lock(c); \
(x)->state = TASK_RUNNING; \
wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0); \
sleepq_release(c); \
if (wakeup_swapper) \
kick_proc0(); \
} while (0)
#define cond_resched() if (!cold) sched_relinquish(curthread)
static inline long
schedule_timeout(signed long timeout)
{
if (timeout < 0)
return 0;
pause("lstim", timeout);
return 0;
}
#endif /* _LINUX_SCHED_H_ */
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