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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* libcfs/include/libcfs/libcfs_prim.h
*
* General primitives.
*
*/
#ifndef __LIBCFS_PRIM_H__
#define __LIBCFS_PRIM_H__
/*
* Schedule
*/
void cfs_pause(cfs_duration_t ticks);
/*
* Timer
*/
typedef void (cfs_timer_func_t)(ulong_ptr_t);
void schedule_timeout_and_set_state(long, int64_t);
void init_waitqueue_entry_current(wait_queue_t *link);
int64_t waitq_timedwait(wait_queue_t *, long, int64_t);
void waitq_wait(wait_queue_t *, long);
void add_wait_queue_exclusive_head(wait_queue_head_t *, wait_queue_t *);
void cfs_init_timer(struct timer_list *t);
void cfs_timer_init(struct timer_list *t, cfs_timer_func_t *func, void *arg);
void cfs_timer_done(struct timer_list *t);
void cfs_timer_arm(struct timer_list *t, cfs_time_t deadline);
void cfs_timer_disarm(struct timer_list *t);
int cfs_timer_is_armed(struct timer_list *t);
cfs_time_t cfs_timer_deadline(struct timer_list *t);
/*
* Memory
*/
#ifndef memory_pressure_get
#define memory_pressure_get() (0)
#endif
#ifndef memory_pressure_set
#define memory_pressure_set() do {} while (0)
#endif
#ifndef memory_pressure_clr
#define memory_pressure_clr() do {} while (0)
#endif
static inline int cfs_memory_pressure_get_and_set(void)
{
int old = memory_pressure_get();
if (!old)
memory_pressure_set();
return old;
}
static inline void cfs_memory_pressure_restore(int old)
{
if (old)
memory_pressure_set();
else
memory_pressure_clr();
return;
}
#endif
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