4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * libcfs/include/libcfs/libcfs_prim.h
40 #ifndef __LIBCFS_PRIM_H__
41 #define __LIBCFS_PRIM_H__
43 #ifndef CFS_EXPORT_SYMBOL
44 # define CFS_EXPORT_SYMBOL(s)
50 void cfs_schedule_timeout_and_set_state(cfs_task_state_t state,
52 void cfs_schedule_timeout(int64_t timeout);
53 void cfs_schedule(void);
54 void cfs_pause(cfs_duration_t ticks);
55 int cfs_need_resched(void);
56 void cfs_cond_resched(void);
61 void cfs_waitq_init(cfs_waitq_t *waitq);
62 void cfs_waitlink_init(cfs_waitlink_t *link);
63 void cfs_waitq_add(cfs_waitq_t *waitq, cfs_waitlink_t *link);
64 void cfs_waitq_add_exclusive(cfs_waitq_t *waitq,
65 cfs_waitlink_t *link);
66 void cfs_waitq_add_exclusive_head(cfs_waitq_t *waitq,
67 cfs_waitlink_t *link);
68 void cfs_waitq_del(cfs_waitq_t *waitq, cfs_waitlink_t *link);
69 int cfs_waitq_active(cfs_waitq_t *waitq);
70 void cfs_waitq_signal(cfs_waitq_t *waitq);
71 void cfs_waitq_signal_nr(cfs_waitq_t *waitq, int nr);
72 void cfs_waitq_broadcast(cfs_waitq_t *waitq);
73 void cfs_waitq_wait(cfs_waitlink_t *link, cfs_task_state_t state);
74 int64_t cfs_waitq_timedwait(cfs_waitlink_t *link, cfs_task_state_t state,
80 typedef void (cfs_timer_func_t)(ulong_ptr_t);
82 void cfs_init_timer(cfs_timer_t *t);
83 void cfs_timer_init(cfs_timer_t *t, cfs_timer_func_t *func, void *arg);
84 void cfs_timer_done(cfs_timer_t *t);
85 void cfs_timer_arm(cfs_timer_t *t, cfs_time_t deadline);
86 void cfs_timer_disarm(cfs_timer_t *t);
87 int cfs_timer_is_armed(cfs_timer_t *t);
88 cfs_time_t cfs_timer_deadline(cfs_timer_t *t);
93 #ifndef cfs_memory_pressure_get
94 #define cfs_memory_pressure_get() (0)
96 #ifndef cfs_memory_pressure_set
97 #define cfs_memory_pressure_set() do {} while (0)
99 #ifndef cfs_memory_pressure_clr
100 #define cfs_memory_pressure_clr() do {} while (0)
103 static inline int cfs_memory_pressure_get_and_set(void)
105 int old = cfs_memory_pressure_get();
108 cfs_memory_pressure_set();
112 static inline void cfs_memory_pressure_restore(int old)
115 cfs_memory_pressure_set();
117 cfs_memory_pressure_clr();