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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.
*/
#ifndef _LINUX_COMPLETION_H_
#define _LINUX_COMPLETION_H_
#include <linux/errno.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sleepqueue.h>
#include <sys/kernel.h>
#include <sys/proc.h>
struct completion {
unsigned int done;
};
#define INIT_COMPLETION(c) ((c).done = 0)
#define init_completion(c) ((c)->done = 0)
static inline void
_complete_common(struct completion *c, int all)
{
int wakeup_swapper;
sleepq_lock(c);
c->done++;
if (all)
wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
else
wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
sleepq_release(c);
if (wakeup_swapper)
kick_proc0();
}
#define complete(c) _complete_common(c, 0)
#define complete_all(c) _complete_common(c, 1)
/*
* Indefinite wait for done != 0 with or without signals.
*/
static inline long
_wait_for_common(struct completion *c, int flags)
{
flags |= SLEEPQ_SLEEP;
for (;;) {
sleepq_lock(c);
if (c->done)
break;
sleepq_add(c, NULL, "completion", flags, 0);
if (flags & SLEEPQ_INTERRUPTIBLE) {
if (sleepq_wait_sig(c, 0) != 0)
return (-ERESTARTSYS);
} else
sleepq_wait(c, 0);
}
c->done--;
sleepq_release(c);
return (0);
}
#define wait_for_completion(c) _wait_for_common(c, 0)
#define wait_for_completion_interuptible(c) \
_wait_for_common(c, SLEEPQ_INTERRUPTIBLE)
static inline long
_wait_for_timeout_common(struct completion *c, long timeout, int flags)
{
long end;
end = ticks + timeout;
flags |= SLEEPQ_SLEEP;
for (;;) {
sleepq_lock(c);
if (c->done)
break;
sleepq_add(c, NULL, "completion", flags, 0);
sleepq_release(c);
sleepq_set_timeout(c, end - ticks);
sleepq_lock(c);
if (flags & SLEEPQ_INTERRUPTIBLE) {
if (sleepq_timedwait_sig(c, 0) != 0)
return (-ERESTARTSYS);
} else
sleepq_timedwait(c, 0);
}
c->done--;
sleepq_release(c);
timeout = end - ticks;
return (timeout > 0 ? timeout : 1);
}
#define wait_for_completion_timeout(c, timeout) \
_wait_for_timeout_common(c, timeout, 0)
#define wait_for_completion_interruptible_timeout(c, timeout) \
_wait_for_timeout_common(c, timeout, SLEEPQ_INTERRUPTIBLE)
static inline int
try_wait_for_completion(struct completion *c)
{
int isdone;
isdone = 1;
sleepq_lock(c);
if (c->done)
c->done--;
else
isdone = 0;
sleepq_release(c);
return (isdone);
}
static inline int
completion_done(struct completion *c)
{
int isdone;
isdone = 1;
sleepq_lock(c);
if (c->done == 0)
isdone = 0;
sleepq_release(c);
return (isdone);
}
#endif /* _LINUX_COMPLETION_H_ */
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